YSI

YSI - a Xylem brand

YSI's environmental products provide high quality, high resolution data to better understand and manage our water resources. They are used for wastewater process control, climate change and drought studies, flood monitoring and warning, stormwater runoff monitoring, groundwater quantification and contamination, aquaculture production and source water safety. In addition to standard products, YSI's custom integrated systems help customers obtain critical data in most any application. Tell us what you need and let us design and deploy a total system, even if you simply just want the data.

Our environmental products provide infrequent maintenance cycles, user interchangeable sensors, and field-rugged enclosures all backed up by a passionate and knowledgeable technical support team.

YSI Life Science and laboratory products are considered the Gold Standard for QC applications. They are used for process control, research and industrial applications by food and beverage, environmental, biofuels, biotech and pharmaceutical customers.

When purchasing YSI, you can expect proven products and technologies that provide true value and low TCO (total cost of ownership). Whatever your instrumentation need, YSI is ready to provide a reliable solution. We know you are passionate about your work...we are equally passionate and enthusiastic about what we can offer to help you succeed.

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  • Products
YSI 2940-2980 Multi-Channel Online Monitor

YSI 2940-2980 Multi-Channel Online Monitor

4 and 8 Channel Online Monitoring Systems

For multiple and parallel bioreactor systems, our 4-channel and 8-channel sampling systems provide many simple and reliable online monitoring and control solutions for your bioreactor processes. Closed-loop monitoring and control capabilities are easily achieved for any scale of operation or type of bioreactor, including single-use systems.

EXO Rechargeable Lithium-Ion Battery

YSI EXO Rechargeable Lithium-Ion Battery

For EXO Handheld Display

This rechargeable Lithium-Ion battery pack allows users to power the EXO Handheld without the need to swap out batteries. Provides a full day of field use on a single charge.
Includes wall charger with user-swappable international plugs and one rechargeable battery pack.

EXO1 Hard Sided Wheeled Carrying Case

YSI EXO1 Hard Sided Wheeled Carrying Case

To be used with EXO1 Multiparameter Sonde

The perfect solution for protecting your sonde and accessories while out of the water. Includes space for one EXO1 sonde, cables/adapters, sensors, and some accessories.

6920 V2 Sonde

YSI 6920 V2 Sonde

Real-time turbidity monitoring, dissolved oxygen monitoring, algae monitoring, and more.

The YSI 6920 V2 sonde is an economical water quality logging system, ideal for long-term in situ monitoring and profiling.Real-time turbidity monitoring, dissolved oxygen monitoring, algae monitoring, and more.

YSI Anti-Fouling C-Spray

YSI Anti-Fouling C-Spray

Non-Toxic Biofouling Inhibitor

Anti-fouling nanopolymer coating that inhibits biofouling attachment on conductivity-temperature probes and other sensors and water quality instruments. 100 mL bottle.

YSI Electrode Kit, ORP15, Blue

YSI Electrode Kit, ORP15, Blue

Electrode Kit, ORP15, Blue

Electrode Kit, ORP15, Blue

YSI Pro20i Dissolved Oxygen Instrument

YSI Pro20i Dissolved Oxygen Instrument

Dissolved Oxygen and Temperature Handheld Instrument with Integral Cable

Dissolved oxygen and temperature handheld instrument with integral cable. The Pro20i is a direct replacement for the model 55 and 550A dissolved oxygen instruments.

6600V2 Sonte

YSI 6600 V2 Sonde

Simultaneous measurement of conductivity (salinity), temperature, depth or level, pH/ORP and more

The YSI 6600 V2 data sonde is the most comprehensive water quality monitoring equipment available with simultaneous measurement of conductivity (salinity), temperature, depth or level, pH/ORP and...

600OMS V2 Sonde

YSI 600OMS V2 Sonde

Single-Parameter, Low-Cost Optical Monitoring

Measure optical dissolved oxygen, chlorophyll, blue-green algae, rhodamine, or turbidity in combination with temperature, conductivity and depth. Designed for use in fresh, sea or polluted waters, the 600OMS V2 data sonde utilizes the field-proven YSI sensors and incorporates innovations in water quality sensor modules that fits into the sonde body.

YSI Anti-Fouling Copper Tape

YSI Anti-Fouling Copper Tape

For use with any sonde or long term deployment sensor

Copper tape for water quality sondes and sensors provides biofouling protection and extends deployments.

YSI EXO1 Anti-Fouling Guard

YSI EXO1 Anti-Fouling Guard

Copper-alloy guard

This copper-alloy sonde guard for the EXO1 protects water quality sensors and provide bio-fouling protection.
The copper construction naturally resists fouling agents in the water and prevents organisms from attaching to the guard.

YSI EXO Probe and Sonde Protective Sleeves

YSI EXO Probe and Sonde Protective Sleeves

Antifouling sleeves for long-term deployments in high fouling environments.

These protective probe and sonde sleeves incase your equipment in an extra layer of protection. Fouling that attaches to this sleeve can be easily removed by simply cutting off and disposing of the sleeve.

6820 V2-2 Multi-Parameter Water Quality Sonde

YSI 6820 V2 Multi Parameter Water Quality Sonde

Compact Sonde for Field Sampling

The YSI 6820 V2-2 is a cost-effective data sonde for profiling and spot-checking water quality in rivers, lakes, wetlands, wells, estuaries, and coastal waters.

YSI 6130 Rhodamine WT Sensor

YSI 6130 Rhodamine WT Sensor

Provides accurate, in situ measurement of Rhodamine WT in fresh, brackish, sea water, stormwater, and wastewater.

This sensor must be installed into a 6-Series sonde to function. Does not function on its own.

The 6130 is a fouling-resistant, wiped sensor designed to seamlessly integrate - using no external interface hardware - with all YSI sondes that contain an optical port. The YSI 6130 provides accurate, in situ measurement of Rhodamine WT in fresh, brackish, and sea water, as well as in stormwater and wastewater. The YSI 6130 Rhodamine WT Sensor rejects turbidity and chlorophyll interference.

YSI EXO3

YSI EXO3 Multiparameter Sonde

5-Port Multiparameter Water Quality Sonde

EXO3 is a purpose-built sonde for monitoring major water quality parameters, including: pH, conductivity, temperature, turbidity, and dissolved oxygen. Offering the greatest value of any sonde available on the market, EXO3 combines the maneuverability of the EXO1 with the powerful antifouling wiper of the EXO2.

EXO2s Customized Multiparameter Sonde

YSI EXO2s (Shorty) Customized Multiparameter Sonde

7-Port, Customized, batteryless Water Quality Sonde

Go more places with YSI EXO2s (Shorty) sonde! The more maneuverable monitoring platform.

This is the EXO2s conversion service only.
EXO2 sonde, cables, probes/sensors, and accessories sold separately.

We have heard from customers who need the payload and capabilities of YSI's best-in-class EXO2 sonde, but in spaces and places that can't accommodate the EXO2. EXO2s is a customized, batteryless sonde that comes with the same warranty and capabilities as the EXO2

5500D MultiDO

YSI 5500D MultiDO Optical Monitoring and Control Instrument

Designed specifically for Aquaculture Systems

Designed specifically for Aquaculture Systems, the YSI 5500D and AquaManager® Software integrate process control, alarming, and data management into one product. Simple enough to monitor one tank, powerful enough to manage a full scale farming operation from anywhere in the world. Simultaneously measure dissolved oxygen with optical technology in multiple tanks or ponds.

YSI WaterLOG Submersible Pressure Transducer(H-3123)

YSI WaterLOG Submersible Pressure Transducer (H-3123)

The WaterLOG® H-3123 is a submersible pressure transducer specifically designed for water level monitoring.

Specifically designed to measure ground and surface water pressure, temperature and levels, the WaterLOG® Submersible Pressure Transducer (H-3123) can transmit data digitally over cable lengths of up to 304.8 meters(1000 feet). Its sleek stainless steel diaphragm and polyurethane vented cable, give the Submersible Pressure Transducer the durability it needs to survive rugged environments. Unique to the Submersible Pressure Transducer is the dry air moisture barrier system, providing atmospheric compensation with no on-site calibration required. 

YSI ProSample Automated Sampler

YSI ProSample Automated Sampler

Fully Automated Programmable Sampler

The NEW YSI ProSample series of fully automated portable samplers expand our process monitoring and control equipment offering. These lightweight and easy to use samplers come with a proprietary peristaltic pump for highly accurate sampling based on time, flow, or event. 

650 MDS Multi-Parameter Display System

YSI 650 MDS Multi-Parameter Display System

Data display and logging system, interfaces with any YSI sonde

Log real-time data, calibrate YSI 6-Series sondes, set-up sondes for deployment, and upload water quality data to a PC with the feature-packed YSI 650MDS (Multiparameter Display System). Designed for reliable field use, this display and data logger features a waterproof IP-67, impact-resistant case.

YSI EXO2 multiparamter water quality instrument

YSI EXO2 Multiparameter Sonde

6-Port Multiparameter Water Quality Sonde with Anti-fouling Wiper

The EXO advanced water quality monitoring platform includes the versatile multiparameter EXO2 sonde for oceanographic, estuarine, or surface water applications. Collect data to 250m with the advanced EXO2 sonde – contains six replaceable 'smart' sensors and a central wiper to clean biofouling.

YSI EMM350 Pisces Lightweight Pontoon

YSI EMM350 Pisces Lightweight Pontoon

Ideal for coastal, estuary, river and lake monitoring.

The YSI EMM350 Pisces is a lightweight pontoon platform which supports water quality, water velocity, and meteorological sensors, as well as computer logging systems.Housing it's payload are two topside aluminum chests that contain the data acquisition system, cellular modem, and battery. The chests are easily serviceable from the water and accommodate multiple underwater cable connections.

2900D Biochemistry Analyzer

YSI 2900D Biochemistry Analyzer

Offers speed and flexibility with the precision and accuracy you need

The YSI 2900 features an intuitive graphical user interface, a USB port for data retrieval, and the ability to measure samples from a variety of sample holders including 96 well plates and microcentrifuge tubes, making 2900 series analyzers the easiest to use and most cost effective way to measure the following chemistries in a wide range of application areas.

2900M Online Monitor & Control System

YSI 2900M Online Monitor & Control System

A key and reliable partner for the monitoring and optimization of your bioprocess.

YSI 2900 Biochemistry Analyzer with YSI 2960 Online Monitor and Control System.

H-3401 RAIN GAUGE

YSI WaterLOG H-340SDI Rain Gauge

Precision tipping bucket rain gauge used in hydro-meteorological applications.

The model H-3401 is a precision tipping bucket rain gauge used in hydro-meteorological applications. Each gauge is calibrated at a rate of 10 millimeters (4 inches) per hour.
Maintain accuracy at increased rates of rainfall ranging from 635 millimeters (0-25 inches) per hour. The H-3401 series is available in .01 in, 0.1 mm and 0.2 mm resolution ranges.

Water Level Radar H-3611-12-13

YSI WaterLOG - Water Level Radar Series (H-3611/12/13)

Rugged Sensors for Reliable Data Collection

The Radar is a non-contact water level sensor, perfect for just about every tough to reach site. It contains a built in LCD display for simple monitoring, setup and maintenance. It's interface is compatible with any data logger that is SDI-12 compliant and you can set the sensor to measure in feet, meters or any other engineering unit you want.

DAA Bubbler

YSI WaterLOG Bubbler / Pressure Sensor (H-3553T)

Rugged Sensors for Reliable Data Collection

The Bubbler has an improved controller and pressure regulator that use a sophisticated system of sensors and valves to regulate the bubble rate and purge pressure. And to keep the sediment from settling around the orifice line, this Bubbler provides a purge feature to keep the pressure at a desired level. You can even start a manual purge, anytime, with the touch of a button. This system was made for those who don't have time to mess around at the site.

Nile Radar Series

YSI WaterLOG Nile Water Level Radar Series

Non-contact water level sensor

NEW Nile Series 502/504/517 models! Designed for non-contact water level measurement. The WaterLOG Nile Series (502/504/517) combines high accuracy with an out-of-the-box measurement range of up to 70 m. The rugged, innovative design was inspired for installation on a bridge or other structure over the water—making this series ideal for sites that may have ice or other instrument-damaging debris. Its reliable interface and simple SDI-12 communication ensure seamless integration with current water monitoring stations. With three models to choose from, the Nile Series is sure to meet your water monitoring needs.

YSI EMM 60

YSI EMM60 Light Weight Hand Held Buoy

Quick and easy access to water quality data

The YSI EMM60 Light Weight Hand Held Buoy provides a quickly deployable water quality monitoring platform with remote telemetry. The system can be lifted into place by one person, reducing deployment and maintenance costs. And the entire system can be installed without divers, allowing for complete serviceability from a small boat or watercraft.

EcoMapper™ AUV (Autonomous Underwater Vehicle)

YSI EcoMapper AUV

Designed for water quality, water currents, and bathymetry mapping applications

This water quality EcoMapper™ AUV (Autonomous Underwater Vehicle) has a YSI 6600 V2 bulkhead built in for collection of up to 10 water quality parameters in large water bodies. Other features include side-scan sonar imaging and a Doppler velocity log for accurate navigation below surface.

Pro1020 Handheld DO pH Meter

YSI Pro1020

Handheld field dissolved oxygen / pH / ORP Meter

The Pro1020 provides everything you need in a handheld meter that measures dissolved oxygen and temperature along with either pH or ORP (redox). Rugged, simple and reliable. Measure pH or ORP, dissolved oxygen, and temperature.

handheld pH/Conductivity or ORP/Conductivity Meter

YSI Pro1030

Handheld Field pH / ORP / Conductivity / Salinity

The Pro1030 provides everything you need in a handheld meter that measures pH or ORP (redox) along with conductivity. Rugged, simple and reliable. Measure pH or ORP, salinity, conductivity, specific conductance, TDS, and temperature.

Pro2030 Handheld DO/Conductivity Meter

YSI Pro2030

Handheld Field Dissolved Oxygen, Conductivity, Salinity Meter

The ideal replacement for the discontinued YSI Model 85. The Pro2030 provides everything you need in a handheld dissolved oxygen meter that automatically compensates for changes in salinity values. Rugged, simple and reliable. Measure DO, salinity, conductivity, specific conductance, TDS, barometric pressure and temperature.

EcoSense ODO200 Handheld

YSI EcoSense ODO200 Handheld - Optical Dissolved Oxygen Meter

Ideal for Dissolved Oxygen (DO) sampling

Accurate, economical, handheld dissolved oxygen measurements using optical technology.

The EcoSense® line of compact, handheld instruments provides the most accurate data in the most affordable format. The instruments feature an easy-to-use interface, one-hand operation, IP67 waterproof case, and low cost of ownership over the life of the product.

YSI Amazon Water Level Bubbler

YSI Amazon Water Level Bubbler

Bubbler/Pressure Sensor - The ideal system for long-term, water level monitoring sites.

Designed with simplicity in mind, the Amazon bubbler is the ideal system for long-term, water level monitoring sites. It can be used as a stand-alone system with internal data storage, or as a sensor connected to any manufacturers data logger. Easily configure and collect data using the browser-based graphical user interface with all standard web browsers on PCs, tablets and smart phones. It's rugged build, and technologically advanced system makes the Amazon Bubbler an attractive solution for real-time monitoring and data collection.

YSI EXO1 and handheld

YSI EXO1 Multiparameter Sonde

Multiparameter 4-port water quality sonde

Capturing accurate data in fresh water, ground water and marine aquatic environments is easy with the versatile multiparameter EXO1 sonde. Ideal for estuarine, surface water or ground water applications.

YSI 9500 Photometer

YSI 9300 + 9500 Photometer

The YSI 9300 and YSI 9500 are economical photometers in small packages for any application. These portable photometers allow you to easily take readings directly in the field for 100+ parameters.

2950D Biochemistry Analyzer

YSI 2950D Biochemistry Analyzer

3 biosensor modules, measures up to 6 parameters. Fast and Accurate - The YSI Gold Standard.

YSI has earned a reputation as the Gold Standard in bio-analytical instruments with highly accurate sensors and rapid results. The key to generating analyte-specific results in 60 seconds or less is YSI's innovative biosensor technology.

5200A Multiparameter Monitoring and Control Instrument

YSI 5200A Multiparameter Monitoring and Control Instrument

Designed specifically for Aquaculture Systems

Designed specifically for Aquaculture Systems, the YSI 5200A and AquaManager™ Software integrate process control, alarming, and data management into one product. Simple enough to monitor one tank, powerful enough to manage a full scale farming operation from anywhere in the world. Simultaneously measure dissolved oxygen, pH, conductivity, ORP, salinity and temperature.

YSI EXO Handheld Display

YSI EXO Handheld Display

Enhanced interface for the EXO platform

Introducing the updated EXO Handheld from YSI - In water quality monitoring, instruments must hold up to harsh conditions. Rain or shine, sleet or snow, your equipment needs to keep up with you.

EcoSense DO200A Dissolved Oxygen Meter Kit

YSI EcoSense DO200A Dissolved Oxygen Meter Kit

Fast dissolved oxygen response times in wastewater, surface water, and aquaculture applications.

The DO200A is part of the EcoSense® family of products. The DO200A dissolved oxygen instrument offers fast dissolved oxygen response times in wastewater, surface water, and aquaculture applications.

EcoSense pH100A Meter Kit

YSI EcoSense pH100A Meter Kit

Simple, one handed operation for pH readings or mV values and temperature

YSI's EcoSense® product line of compact, handheld instruments includes the pH100A pH meter. For simple, one handed operation for pH readings or mV values and temperature the pH100A is a logical choice.

YSI 556 Handheld Multiparameter Instrument

YSI 556 Handheld Multiparameter Instrument

The 556 MPS handheld instrument has been discontinued.

The 556 MPS handheld instrument has been discontinued and Xylem Analytics Australia is no longer accepting orders for this instrument. However, we will continue to support existing 556's for the next 5 years. We recommend The Professional Plus (Pro Plus) or ProDSS handheld instruments as suitable replacements.

YSI MultiLab 4010-1 Laboratory Instrument

YSI MultiLab 4010-1

Single channel benchtop multiparameter instrument

Connect digital IDS sensors to the MultiLab 4010-1 for the measurement of pH, ORP, conductivity, and DO/BOD.

YSI MultiLab 4010-2

YSI MultiLab 4010-2

Two channel benchtop multiparameter instrument

Laboratory Instruments for pH, ORP, conductivity, BOD and Ion Activity Measurement
Connect digital IDS sensors to the MultiLab 4010-2 for the measurement of pH, ORP, conductivity, and DO/BOD in any combination. Ion selective electrodes (ISEs) can also be connected to the instrument.

YSI MultiLab 4010-3

YSI MultiLab 4010-3

Three channel benchtop multiparameter instrument

Laboratory Instrument for pH, ORP, Conductivity, BOD and Ion Activity Measurement
Connect digital IDS sensors to the MultiLab 4010-3 for the measurement of pH, ORP, conductivity, and DO/BOD in any combination. Ion selective electrodes (ISEs) can also be connected to the instrument.

YSI MultiLab IDS Kit

YSI MultiLab IDS Kit

Laboratory instrument for pH, ORP, conductivity and BOD in any combination.

The YSI MultiLab line includes the 4010-1 (single channel), 4010-2 (dual channel) and 4010-3 (three channel) instruments providing easy to use and calibrate menu-driven operation ideal for the laboratory.

TruLab pH/ISE 1320

YSI TruLab 1320 pH/ISE

Laboratory Instrument for pH, mV (ORP), and Ion Activity Measurement

Measure pH, ORP, and ion activity with the TruLab 1320 dual channel instrument by choosing from our wide selection of electrodes.

5100 Dissolved Oxygen Instrument

YSI 5000/5100 DO Laboratory Benchtop Meters

Easily conduct DO, BODs or OUR/SOUR tests.

Accurate, reliable YSI benchtop dissolved oxygen instruments for the laboratory. Easily conduct DO, BODs or OUR/SOUR tests. Both instruments feature: auto-calibration, large, graphic displays and low keypad profiles for maximum efficiency.

YSI 3200 Conductivity Meter

YSI 3200 Conductivity Meter

Laboratory Conductivity, Resistivity, Salinity, TDS

The YSI 3200 is an innovative instrument that offers unmatched accuracy for ultrapure water analysis, multipoint calibration, and a high/low alarm for process applications.

YSI TruLine Nitrate Electrode Kit

YSI TruLine Nitrate Electrode Kit

Includes ISE with replaceable sensor module and refillable reference, fill solution, ISA, and high (1000 mg/L) standard.

Each TruLine ISE features an integrated reference. This eliminates the need for a separate reference half-cell when measuring ion concentration and is more convenient. Each ISE can be refilled with reference/electrode filling solution, extending the life of each ISE. The electrodes also feature a double-junction reference for optimum performance in the lab.

YSI Science pHT-G

YSI Science pHT-G pH Electrode

Double Junction, 3 in 1, ground joint junction, 170 mm length, micro electrode

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI Science pHT-Micro

YSI Science pHT-Micro pH Electrode

Double Junction, 3 in 1, Platinum junction, 170 mm length, micro electrode

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI TruLine pH 27

YSI TruLine pH 27 Electrode

Single Junction, combination, flat glass membrane, glass shaft

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI IoLine Micro - 3 in 1

YSI IoLine Micro 3 in 1 pH Electrode

3 in 1, pH electrode, Triple Junction, Iodine/Iodide reference, 3 in 1, Refillable, Micro electrode

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI TruLine Ammonia Electrode Kit

YSI TruLine Ammonia Electrode Kit

Ammonia ISE range: 0.02 to 17000 mg/L

Each TruLine ISE features an integrated reference. This eliminates the need for a separate reference half-cell when measuring ion concentration and is more convenient. Each ISE can be refilled with reference/electrode filling solution, extending the life of each ISE. The electrodes also feature a double-junction reference for optimum performance in the lab.

YSI IoLine - 3 in 1

YSI IoLine 3 in 1 pH Electrode

Triple Junction, self-flushing platinum junction, Iodine/Iodide reference, 3 in 1, refillable

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI ProOBOD Optical BOD Probe

YSI ProOBOD Optical BOD Probe

Designed for use with the YSI ProODO Instrument

The ProOBOD® self-stirring optical BOD probes are designed to fit into standard 300 mL BOD bottles with an international version also available for use with other tapers.

YSI EcoSense BOD Probe

YSI EcoSense BOD Probe

Self-stirring BOD Probe

Self-stirring laboratory BOD probe for use with the EcoSense DO200 or DO200A.
Includes external power adapter and 5908 Cap Membrane Kit (1.25 Mil PE membranes).

YSI EXO Wiped Conductivity & Temperature Sensor

YSI EXO Wiped CT Conductivity & Temperature Sensor

Better conductivity measurements for the EXO2 platform

In long-term water quality monitoring, biofouling is public enemy number one. Biofilms, barnacles, and algal growth are common culprits of poor data quality, clogging up conductivity cells and coating sensor optics. While YSI EXO2's Central Wiper can mechanically remove biofouling from other sensors to maintain data integrity over long deployment periods, the anatomy of a standard conductivity & temperature sensor makes this anti-fouling technique ineffective...until now.

Introducing the EXO Wiped Conductivity & Temperature sensor from YSI, designed with and engineered for compatibility with EXO2's Central Wiper.

EXO Conductivity & Temperature Smart Sensor

YSI EXO Conductivity & Temperature Smart Sensor

Improved range of conductivity and increased accuracy of temperature sensors to better address oceanographic challenges

Note: This product is intended for sampling and profiling applications.
This sensor must be installed into an EXO Sonde to function (EXO1 | EXO2). Does not function on its own.

For long-term monitoring in fouling environments, please see our Wiped (C/T) sensor for the EXO2 platform.

EXO pH & ORP Smart Sensor

YSI EXO pH & ORP Smart Sensor

Guarded, digital smart sensor featuring welded titanium construction and wet-mateable connectors

The EXO guarded pH & ORP sensor is a digital smart sensor featuring welded titanium construction and wet-mateable connectors. Complete calibration in less than 15 minutes using EXO's suite of smart sensors and intuitive KOR interface software.

EXO pH & ORP Sensor Replacement Module

YSI EXO pH & ORP Sensor Replacement Module

Guarded pH/ORP Module

User-replaceable tip for #599705 - EXO guarded pH/ORP sensor

EXO Turbidity Smart Sensor

YSI EXO Turbidity Smart Sensor

Optical Sensor

The EXO turbidity sensor is a digital smart sensor featuring welded titanium construction and wet-mateable connectors. Complete calibration in less than 15 minutes using EXO's suite of smart sensors and intuitive KOR interface software.

EXO Total Algae PC Smart Sensor

YSI EXO Total Algae PC Smart Sensor

Phycocyanin - Freshwater

The EXO total algae PC sensor is a digital smart sensor (chlorophyll & phycocyanin) featuring welded titanium construction and wet-mateable connectors optimized for freshwater use. Complete calibration in less than 15 minutes using EXO's suite of smart sensors and intuitive KOR interface software.

EXO Optical Dissolved Oxygen Smart Sensor

YSI EXO Optical Dissolved Oxygen Smart Sensor

Optical Sensor

The EXO optical dissolved oxygen sensor is a digital smart sensor featuring welded titanium construction and wet-mateable connectors. Complete calibration in less than 15 minutes using EXO's suite of smart sensors and intuitive KOR interface software.

6150 ROX Dissolved Oxygen Sensor

YSI 6150 ROX Dissolved Oxygen Sensor

Luminescent-based dissolved oxygen sensor

The YSI 6150 Reliable Oxygen Sensor (ROX) is a luminescent-based DO sensor that provides accurate long-term measurements in severe fouling and low oxygen environments.

6131 Blue-Green Algae Sensor

YSI 6131 Blue-Green Algae Sensor

Monitors algal populations at natural levels in freshwater

The YSI 6131 blue-green algae sensor monitors algal populations at natural levels in freshwater, providing an early warning for bloom conditions.

6025 Chlorophyll Sensor

YSI 6025 Chlorophyll Sensor

Designed to for the 6-Series sonde to estimate phytoplankton concentrations

Predict algae blooms and determine the nutrient loading in water with the YSI 6025 Chlorophyll Sensor.

6136 Turbidity Sensor

YSI 6136 Turbidity Sensor

Fouling resistant turbidity sensor for 6-Series water quality sondes.

The YSI 6136 Turbidity Probe is a fouling-resistant, wiped sensor designed to seamlessly integrate - using no external interface hardware - with all YSI sondes that contain an optical port. The YSI 6136 provides accurate, in situ measurement of turbidity in fresh, brackish, and sea water, as well as other applications requiring highly accurate turbidity data.

6560 Temperature/Conductivity Sensor

YSI 6560 Temperature/Conductivity Sensor

For use with a 6-Series Sonde

Stable multi-probe measures conductivity and temperature levels and calculates salinity values. Thermistor readings are used to temperature-correct other parameter measurements.

6589 Fast-Response pH Sensor

YSI 6589 Fast-Response pH Sensor

For use with the 6-Series Sonde

Simple, accurate pH measurement in sensors designed for minimal maintenance in sampling, profiling, and long-term monitoring applications.

6425AF Anti-Fouling Chlorophyll Sensor

YSI 6425AF Anti-Fouling Chlorophyll Sensor

For use with the 6-Series Sonde

Predict algae blooms and determine the nutrient loading in water with the YSI 6425AF Chlorophyll Sensor.

6431AF Anti-Fouling Blue-Green Algae Sensor

YSI 6431AF Anti-Fouling Blue-Green Algae Sensor

For use with the 6-Series Sonde

The YSI 6431AF blue-green algae sensor monitors algal populations at natural levels in freshwater, providing an early warning for bloom conditions.

6436AF Anti-Fouling Turbidity Sensor

YSI 6436AF Anti-Fouling Turbidity Sensor

Anti-fouling turbidity sensor for 6-Series water quality sondes.

Copper-based parts on the YSI 6436AF Turbidity Sensor repel aquatic growth on sensors, extending deployment periods.
The YSI 6436AF Turbidity Probe is an anti-fouling, wiped sensor designed to seamlessly integrate - using no external interface hardware - with all YSI sondes that contain an optical port. The YSI 6136 provides accurate, in situ measurement of turbidity in fresh, brackish, and sea water, as well as other applications requiring highly accurate turbidity data.

6450AF Anti-Fouling Dissolved Oxygen Sensor

YSI 6450AF Anti-Fouling Dissolved Oxygen Sensor

For use with the 6-Series sonde

The YSI 6450AF anti-fouling DO sensor is a luminescent-based DO sensor that provides accurate long-term measurements in severe fouling and low oxygen environments.

YSI 900 Chlorine Colorimeter

YSI 900 Chlorine Colorimeter

Waterproof, accurate, easy to use colorimeter

The YSI 900 Free and Total chlorine colorimeter is ideal for any application. This portable instrument allows you to easily take readings directly in the field or lab.

EXO fDOM Smart Sensor

YSI EXO fDOM Smart Sensor

Fluorescent Dissolved Organic Matter

The EXO fDOM (fluorescent dissolved organic matter) sensor is a digital smart sensor featuring welded titanium construction and wet-mateable connectors. Complete calibration in less than 15 minutes using EXO's suite of smart sensors and intuitive KOR interface software.

YSI 600LS Water Level Sonde

YSI 600LS Water Level Sonde

Precise Level Measurement in a Compact Sonde

Measure level, flow, temperature and conductivity with the compact 600LS sonde. Rugged and waterproof, the YSI 600LS is perfect for tide gauge monitoring, wetlands level applications, ground water, estuaries, rivers, and more.

EXO Field Cable

YSI EXO Field Cable

Designed to connect the EXO Handheld Display to the EXO sondes

EXO field cables feature rugged wet-mate connectors and are designed to connect the EXO Handheld Display to the EXO sondes. Comes in a variety of lengths to support specific application needs.

EXO Replaceable DO Sensor Cap

YSI EXO Dissolved Oxygen Sensor Cap Replacement Kit

Replaceable DO Sensor Cap

Replacement sensor cap for EXO Optical Dissolved Oxygen Sensor.
Includes hydrating cap and quick start guide.

Coastal Monitoring Buoy

YSI EMM2.0 - Coastal Buoy

monitoring buoy designed for coastal and blue water applications

The YSI EMM2.0 is one of the most versatile and reliable buoy solutions on the market. These buoys have been deployed with wet-chemistry nutrient and metal analyzers, current meters, water quality monitors, GPS, atmospheric sensors, wave sensors, hydrocarbon sensors, and more. The stable platform can be easily customized to maximize instrumentation on a single monitoring platform. Adding satellite, radio, or cellular telemetry provides data to a custom visual display, making it easy for researchers and operators alike to receive critical data on a daily basis.

PAR - Photosynthetically Active Radiation

YSI PAR System - Photosynthetically Active Radiation

Integrated Li-Cor PAR sensors with 6600 Sondes

YSI offers several PAR systems that can be directly integrated into existing or new 6600 multiparameter sondes. PAR sensors are powered by the sonde and PAR data is added to the data stream of the water quality sonde.

Cap Membrane Kit 1.00 Mil Teflon

YSI Cap Membrane Kit 1.00 Mil Teflon

YSI 5906 screw-on cap dissolved oxygen membranes.

Includes bottle of electrolyte, 1 sanding disc, and 6 screw-on cap membranes. 1.00 Mil FEP Fluoropolymer film membranes. Black cap.

YSI pH Buffer

YSI pH Buffer

Various pH buffers for pH probe calibration.

Choose between pH, 4, 7, and 10 buffer solutions.
Each buffer case contains 6 individual pints (plastic). Buffer cases are available with a single buffer type or with an assortment of buffers (2 pints of pH 4, 7, and 10 buffers).

YSI Conductivity Calibrator Solution

YSI Conductivity Calibrator Solution

Calibrate both field instruments and lab instruments and cells together for maximum accuracy

NIST-traceable conductivity solutions to calibrate both field instruments and lab instruments and cells together for maximum accuracy

YSI Turbidity Standard

YSI Turbidity Standard

Extremely accurate and stable solutions.

YSI turbidity solutions calibrate your instruments for maximum accuracy. Extremely accurate and stable solutions.

YSI Zobell Solution ORP Calibrator

YSI Zobell Solution ORP Calibrator

Used for calibrating ORP/Redox

YSI 3682 Zobell solution is used for calibrating ORP/Redox on several YSI instruments.

YSI 5580 Confidence Solution

YSI 5580 Confidence Solution

Case includes 6 plastic bottles (1 pint each).

Never worry about the accuracy of your pH, ORP, or conductivity data again! Ensure probe performance with the 5580 Confidence Solution®.

EMM25 - Sonde Spar

YSI EMM25 - Sonde Spar

low cost, rapid deployment, short term use buoy

Looking for a cost effective way to deploy a water quality sonde? The YSI EMM25, Sonde Spar is designed to be a low cost option for short and long-term monitoring. It's simple to use design allows for rapid deployment for event monitoring and emergency response. The lightweight design allows for the system to be deployed by a single person; it can be deployed from a small boat or from shore. The integral deployment tube will accept any YSI EXO or 6-Series sonde or 3rd party device.

Available options for the EMM25 Sonde Spar include an amber, self-contained flashing beacon for deployments in navigable waters. Bluetooth connectivity for remote data access from a compatible Bluetooth enabled device.

EMM68 - Harbor Buoy

YSI EMM68 - Harbour Buoy

Robust monitoring system in a small, compact design

The Harbour buoy provides a quickly deployable water quality monitoring platform with remote telemetry. The system can be lifted by two people. And it is completely serviceable from a small boat.

Remote data delivery keeps you informed of changing conditions as they occur, such as storms, discharges, CSOs, TMDLs, dredging, and construction. Collect data in waters as shallow as 1.8 meters.

WaterLOG Shaft Encoder Water Level Instrument (H-3301/11/42)

YSI WaterLOG Shaft Encoder Water Level Instrument (H-3301/11/42)

Designed specifically for measuring water level in a stilling well.

Designed specifically for measuring water level in a stilling well, the Shaft Encoder Series (H-3301/3311/3342) sturdy design incorporates the use a float and pulley to produce accurate data within minutes of installation. Now, with the use of magnetic sensors, the WaterLOG Shaft Encoder features minimize static sensitivity for enhanced performance. You'll enjoy the easy to read, ultra low power, built-in LDC display allowing you to view the last measured value at any time. And this series is compatible with most data loggers, to allow easy installation. With three models to choose from, you can be sure to get a Shaft Encoder that has all the features you are looking for and more.

ProOBOD

YSI ProODO - Dissolved Oxygen Meter

Simply the best handheld optical dissolved oxygen instrument on the market.

The YSI PRO ODO is the best handheld optical dissolved oxygen instrument on the market. The handheld dissolved oxygen meter provides extreme durability for measuring DO with optical, luminescent based technology for both the field and lab.

YSI Pro Plus multiparameter instrument

YSI Professional Plus Multiparameter Meter

Most Versatile Handheld Multiparameter Instrument

The YSI Professional Plus handheld multiparameter meter provides extreme flexibility for the measurement of a variety of parameters such as DO, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature.

EMM700 - Bay Buoy

YSI EMM700 - Bay Buoy

Monitoring buoy for coastal waters or multiple sensor payload

With more free-board and greater load capacity, this buoy supports a wide array of water quality instrumentation and other systems. Heavy-duty, lightweight foam hull withstands collisions and harsh conditions in lakes, ponds, rivers, reservoirs, and near coastal applications. The YSI Bay Buoy is easy to handle and can be deployed from most small vessels.

 i3XO EcoMapper AUV

YSI i3XO EcoMapper AUV

Generates high-resolution maps of water quality, water currents, bathymetry, and sonar imagery.

The next generation of autonomous water quality vehicles. The i3XO EcoMapper generates high-resolution maps of water quality, water currents, bathymetry, and sonar imagery.
Navigate challenging natural environments with a monitoring platform that will generate the highest-resolution data at a low cost and low risk to your personnel.

Fixed - Vertical Profiling System

YSI 6950 Fixed - Vertical Profiling System

designed for a pier, piling, or dam face

Mountable on a dam, pier, piling, or other stationary location, the 6950 offers user-programmable sample intervals with wireless transmission options. The YSI 6950 is compatible with all YSI EXO and 6-Series sondes equipped with depth, and comes with Profile Wizard software for easy set-up and deployment.

YSI EXO DCP Signal Output Adapter 2.0

YSI EXO DCP Signal Output Adapter 2.0

Converts an EXO sonde signal into either SDI-12 or RS-232.

This adapter converts an EXO sonde signal into either SDI-12 or RS-232. 
For SCADA applications, please see our EXO Modbus Adapter.
Note: This product is intended for use in a long term monitoring system. Requires an EXO Sonde, data logger, and flying lead cable to function.

YSI ProDSS Handheld Instrument

YSI ProDSS - Digital Sampling System

Handheld Multiparameter Instrument with Digital Sensors

The YSI ProDSS (digital sampling system) handheld multiparameter meter provides extreme flexibility for the measurement of a variety of combinations for dissolved oxygen, turbidity, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature along with depth.

Multiparameter water quality verticle profiler

YSI 6951 Pontoon - Vertical Profiling System

Ideal for ponds, lakes, reservoirs, and certain coastal applications

The YSI 6951 Pontoon Vertical Profiling System offers user-programmable sample intervals, redundant error recovery logic that detects unexpected activity and recovers automatically, and is compatible with all YSI EXO and 6-Series sondes equipped with depth.

YSI TruLab pH 1310

YSI TruLab pH 1310

Advanced laboratory Instrument for pH, mV (ORP) and temperature

Laboratory Instrument for pH, mV (ORP) and temperature. Perform accurate lab pH, mV (ORP) and temperature measurements with the YSI 1310 and 1310P with printer. EPA approved for drinking water and wastewater compliance reporting of pH.

Instrument Only. Cables, probes/sensors, and accessories sold separately.

YSI TruLab pH 1310P

YSI TruLab pH 1310P

Single channel pH and mV (ORP) benchtop instrument with integrated printer

Laboratory Instrument for pH, mV (ORP) and temperature.Perform accurate lab pH, mV (ORP) and temperature measurements with the YSI 1310 and 1310P with printer.

EPA approved for drinking water and wastewater compliance reporting of pH.

Instrument Only. Cables, probes/sensors, and accessories sold separately.

YSI TruLab pH 1110

YSI TruLab pH 1110

pH/mV single channel benchtop instrument with BNC and two banana plug connectors

Laboratory Instrument for pH, mV (ORP) and temperature

Perform accurate lab pH, mV (ORP) and temperature measurements with the YSI 1110. TruLab 1110 pH/mV single channel benchtop instrument with BNC and two banana plug connectors. Includes instrument, universal AC power supply and electrode stand.

EPA approved for drinking water and wastewater compliance reporting of pH.

Instrument Only. Cables, probes/sensors, and accessories sold separately.

YSI TruLab pH/ISE 1320P

YSI TruLab pH/ISE 1320P

Dual channel benchtop pH/ORP/ISE instrument with integrated printer

Laboratory Instrument for pH, mV (ORP), and Ion Activity Measurement

Measure pH, ORP, and ion activity with the TruLab 1320 dual channel instrument by choosing from our wide selection of electrodes. Data can be conveniently printed from the instrument via the optional integrated printer (1320P).

EPA approved for drinking water and wastewater compliance reporting.

Instrument Only. Cables, probes/sensors, and accessories sold separately.

YSI MultiLab IDS 4110 pH and Temperature Sensor

YSI MultiLab IDS 4110 pH and Temperature Sensor

Combination pH and temperature, Plastic, Gel filled, digital, double junction probe, 1.5 meter cable

pH electrode, plastic, gel, digital, double junction, 1.5 meter (~5 ft) cable

YSI MultiLab 4010P-1

YSI MultiLab 4010P-1

Single channel benchtop multiparameter instrument with integrated printer

Laboratory instrument for DO/BOD, pH, ORP, and conductivity measurement. EPA approved for drinking water and wastewater compliance reporting.

Connect digital IDS sensors to the MultiLab 4010-1 for the measurement of DO/BOD, pH, ORP, and conductivity. Data can be conveniently printed from the instrument via the optional integrated printer (4010P-1).

Instrument Only. Cables, probes/sensors, and accessories sold separately.

YSI MultiLab IDS 4120 pH and Temperature Sensor

YSI MultiLab IDS 4120 pH and Temperature Sensor

Combination pH and temperature, plastic, 3 mol KCl, digital,double junction, 1.5 meter cable, refillable reference

pH and temperature, plastic, 3 mol KCl, digital, double junction probe, 1.5 meter (~5 ft) cable, refillable reference

YSI MultiLab IDS 4110-3 pH and Temperature Sensor

YSI MultiLab IDS 4110-3 pH and Temperature Sensor

Combination pH and temperature, Plastic, Gel filled, digital, double junction probe, 3 meter cable

pH electrode, plastic, gel, digital, double junction, 3 meter (~10 ft) cable

YSI MultiLab IDS 4130 pH and Temperature Sensor

YSI MultiLab IDS 4130 pH and Temperature Sensor

Combination pH and temperature, Glass, 3 mol KCL, digital, double junction probe, 1.5 meter cable, refillable reference

pH and temperature, glass, 3 mol KCL, digital, double junction, 1.5 meter (~5 ft) cable, refillable reference

YSI MultiLab IDS 4210 ORP Sensor

YSI MultiLab IDS 4210 ORP Sensor

Combination ORP, Glass , digital, double junction probe, 1.5 meter cable

ORP, glass, digital, double junction, 1.5 meter (~5 ft) cable

YSI MultiLab IDS 4310 Conductivity and Temperature Sensor

YSI MultiLab IDS 4310 Conductivity and Temperature Sensor

Conductivity and temperature, Epoxy body, 4-graphite electrodes, digital probe, 1.5 meter cable

IDS 4310 digital conductivity/temperature probe for the YSI MultiLab. Features an epoxy body, 4-graphite electrodes, and a 1.5 meter cable. The 4310 probe can only be calibrated with a 1,413 uS/cm conductivity standard (060906) (Select in "Option" drop down menu).

YSI MultiLab IDS 4310-3 Conductivity and Temperature Sensor

YSI MultiLab IDS 4310-3 Conductivity and Temperature Sensor

Conductivity and temperature, Epoxy body, 4-graphite electrodes, digital probe, 3 meter cable

IDS 4310-3 digital conductivity/temperature probe for the YSI MultiLab. Features an epoxy body, 4-graphite electrodes, and a 3 meter cable. The 4310-3 can only be calibrated with a 1,413 uS/cm conductivity standard (060906) (Select in "Option" drop down menu).

YSI MultiLab IDS 4320 Conductivity and Temperature Sensor

YSI MultiLab IDS 4320 Conductivity and Temperature Sensor

Conductivity and temperature, Stainless Steel body, 2-electrodes, digital probe, 1.5 meter cable

IDS 4320 digital conductivity/temperature probe for the YSI MultiLab. Features a stainless steel body, 2-electrodes, and a 1.5 meter cable. The IDS 4320 probe is designed for ultra-pure water applications and cannot be calibrated by the user, although the probe is factory calibrated.

YSI MultiLab 4010 Stand

YSI MultiLab 4010 Stand

Stand + holder for MultiLab 4010

Stand + holder for MultiLab 4010.

YSI MultiLab IDS ProOBOD

YSI MultiLab IDS ProOBOD

Optical Self stirring BOD probe with temperature sensor, IDS

The IDS ProOBOD® self-stirring optical BOD probe for use with the YSI MultiLab. Designed to fit into standard 300 mL BOD bottles. EPA approved for wastewater compliance reporting of BOD and CBOD.

YSI MultiLab 4010 Power Supply

YSI MultiLab 4010 Power Supply

Universal power supply for MultiLab instruments

Universal power supply for MultiLab instruments.

YSI QSC Kit

YSI QSC Kit

Calibration kit for IDS pH electrodes; 3 ampules: 4.01, 6.86, 9.18
YSI TruLine Ammonium Electrode Kit

YSI TruLine Ammonium Electrode Kit

Includes ISE with replaceable sensor module and refillable reference, fill solution, ISA, and high standard.

The TruLine Ammonium ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Ammonium laboratory electrode kit includes a PVC membrane combination ISE with replaceable sensor module and refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) standard.

Ammonium ISE range: 0.02 to 1800 mg/L

YSI TruLine Cyanide Electrode Kit

YSI TruLine Cyanide Electrode Kit

Includes ISE with refillable reference, fill solution, and ISA.

The TruLine Cyanide ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Cyanide laboratory electrode kit includes a solid state combination ISE with refillable reference, bottle of fill solution (30 mL), and a bottle of ISA (30 mL).

Cyanide ISE range: 0.2 to 260 mg/L

EPA approved for wastewater and drinking water compliance reporting of cyanide.

YSI TruLine Iodide Electrode Kit

YSI TruLine Iodide Electrode Kit

Includes ISE with refillable reference, fill solution, ISA, and high standard.

The TruLine Iodide ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Iodide laboratory electrode kit includes a solid state combination ISE with refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) standard.

Iodide ISE range: 0.006 to 127000 mg/L

YSI TruLine Bromide Electrode Kit

YSI TruLine Bromide Electrode Kit

Includes ISE with refillable reference, fill solution, ISA, and high standard.

The TruLine Bromide ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Bromide laboratory electrode kit includes a solid state combination ISE with refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) standard.

Bromide ISE range: 0.4 to 79900 mg/L

EPA approved for wastewater compliance reporting of bromide.

YSI TruLine Copper Electrode Kit

YSI TruLine Copper Electrode Kit

Includes ISE with refillable reference, fill solution, ISA, and high standard.

The TruLine Copper ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Copper laboratory electrode kit includes a solid state combination ISE with refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) standard.

Copper ISE range: 0.06 to 6400 mg/L

YSI TruLine Sodium Electrode Kit

YSI TruLine Sodium Electrode Kit

Includes ISE with refillable reference, fill solution, ISA, and high standard.

The TruLine Sodium ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Sodium laboratory electrode kit includes a glass sensor combination ISE with refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) standard.

Sodium ISE range: 0.1 to 23000 mg/L

YSI 3 M KCl Electrolyte Solution

YSI 3 M KCl Electrolyte Solution

250 mL of solution for refillable lab electrodes

250 mL of solution for refillable lab electrodes

YSI TruLine Calcium Electrode Kit

YSI TruLine Calcium Electrode Kit

Includes ISE with replaceable sensor module and refillable reference, fill solution, ISA, and high standard.

The TruLine Calcium ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Calcium laboratory electrode kit includes a PVC membrane combination ISE with replaceable sensor module and refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) standard.

Calcium ISE range: 0.02 to 40000 mg/L

YSI TruLine Fluoride Electrode Kit

YSI TruLine Fluoride Electrode Kit

Includes ISE with refillable reference, fill solution, ISA, and high standard.

The TruLine Fluoride ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Fluoride laboratory electrode kit includes a solid state combination ISE with refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) standard.

Fluoride ISE range: 0.02 to saturation

EPA approved for wastewater and drinking water compliance reporting of fluoride.

YSI TruLine Lead Electrode Kit

YSI TruLine Lead Electrode Kit

Includes ISE with refillable reference, fill solution, ISA, and high standard.

The TruLine Lead ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Lead laboratory electrode kit includes a solid state combination ISE with refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) standard.

Lead ISE range: 0.02 to 20700 mg/L

YSI TruLine Cadmium Electrode Kit

YSI TruLine Cadmium Electrode Kit

Includes ISE with refillable reference, fill solution, ISA, and high standard.

The TruLine Cadmium ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Cadmium laboratory electrode kit includes a solid state combination ISE with refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) standard.

Cadmium ISE range: 0.1 to 11200 mg/L

YSI TruLine Potassium Electrode Kit

YSI TruLine Potassium Electrode Kit

Includes ISE with replaceable sensor module and refillable reference, fill solution, ISA, and high standard.

The TruLine Potassium ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Potassium laboratory electrode kit includes a PVC membrane combination ISE with replaceable sensor module and refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) standard.

Potassium ISE range: 0.04 to 39000 mg/L

EPA approved for wastewater compliance reporting of potassium.

YSI TruLine Silver/Sulfide Electrode Kit

YSI TruLine Silver/Sulfide Electrode Kit

Includes ISE with refillable reference, fill solution, ISA, and high silver standard.

The TruLine Silver/Sulfide ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Silver/Sulfide laboratory electrode kit includes a solid state combination ISE with refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) silver standard.

Silver/Sulfide ISE range: 0.01 to 107900 mg/L (silver); 0.003 to 32100 mg/L (sulfide)

EPA approved for wastewater compliance reporting of sulfide.

YSI TruLine Chloride Electrode Kit

YSI TruLine Chloride Electrode Kit

Includes ISE with refillable reference, fill solution, ISA, and high standard.

The TruLine Chloride ISE features BNC connection and can be used with the YSI TruLab 1320. It can also be used with the YSI MultiLab 4010-2 or 4010-3 if a BNC adapter is installed.

The TruLine Chloride laboratory electrode kit includes a solid state combination ISE with refillable reference, bottle of fill solution (30 mL), bottle of ISA (30 mL), and small bottle (30 mL) of high (1000 mg/L) standard.

Chloride ISE range: 1.8 to 35000 mg/L

EPA approved for wastewater compliance reporting of chloride.

YSI USB A – Mini B Cable

YSI USB A – Mini B Cable

USB cable for connecting instrument with USB-Mini B to a Computer

USB cable for connecting the MultiLab, ProPlus and ProODO instruments to a computer.

YSI 5000 Dissolved Oxygen Instrument

YSI 5000 Dissolved Oxygen Instrument

Laboratory instrument for dissolved oxygen measurements

Accurate, reliable YSI benchtop dissolved oxygen instruments for the laboratory. Easily conduct DO, BODs or OUR/SOUR tests. Both instruments feature: auto-calibration, large, graphic displays and low keypad profiles for maximum efficiency. EPA approved for wastewater compliance reporting of BOD, CBOD, and DO. 

Has the 5000 been your trusted BOD instrument for the last decade? If so, check out our new BOD instrument, the YSI MultiLab.

YSI 5100 Dissolved Oxygen Instrument

YSI 5100 Dissolved Oxygen Instrument

Advanced laboratory instrument for dissolved oxygen measurements

Accurate, reliable YSI benchtop dissolved oxygen instruments for the laboratory. Easily conduct DO, BODs or OUR/SOUR tests. Both instruments feature: auto-calibration, large, graphic displays and low keypad profiles for maximum efficiency. EPA approved for wastewater compliance reporting of BOD, CBOD, and DO.

Has the 5100 been your trusted BOD instrument for the last decade? If so, check out our new BOD instrument, the YSI MultiLab.

YSI Ecosense Carrying Case, Hard Plastic w/Form Fitted Foam Insert Only

YSI Ecosense Carrying Case, Hard Plastic w/Form Fitted Foam Insert Only

Carrying Case, Hard Plastic w/Form Fitted Foam Insert 12.5x9.5x3.7

Carrying Case, Hard Plastic w/Form Fitted Foam Insert 12.5x9.5x3.7

YSI EcoSense DO200A Dissolved Oxygen Field Cable

YSI EcoSense DO200A Dissolved Oxygen Field Cable

DO and Temp Field Probe and Cable

DO and Temp Field Probe and Cable

YSI EcoSense EC300A Conductivity Field Cable

YSI EcoSense EC300A Conductivity Field Cable

Conductivity/Temperature Probe and Cable

Conductivity/Temperature Probe and Cable

YSI EcoSense EC300A Conductivity Meter

YSI EcoSense EC300A Conductivity Meter

Conductivity, TDS, Salinity, Temperature. Instrument Only

The EC300A handheld conductivity instrument is part of the EcoSense® family of products. The EC300A offers convenient conductivity, specific conductance, salinity, total dissolved solids, and temperature with a super-stable, four-electrode conductivity cell for true field applications.

Instrument Only. Cables, probes/sensors, and accessories sold separately.

YSI EcoSense EC300A Conductivity Meter Kit

YSI EcoSense EC300A Conductivity Meter Kit

Includes EC300A instrument, cable (1, 4 or 10 meters), and hard-sided case

The EC300A handheld conductivity instrument is part of the EcoSense® family of products. The EC300A offers convenient conductivity, specific conductance, salinity, total dissolved solids, and temperature with a super-stable, four-electrode conductivity cell for true field applications.

YSI EcoSense EC30A Conductivity Pen

YSI EcoSense EC30A Conductivity Pen

Easy-to-use conductivity, TDS and temperature instrument

The EC300A handheld conductivity instrument is part of the EcoSense® family of products. The EC300A offers convenient conductivity, specific conductance, salinity, total dissolved solids, and temperature with a super-stable, four-electrode conductivity cell for true field applications.

YSI EcoSense ODO200 Optical Dissolved Oxygen Meter Kit

YSI EcoSense ODO200 Optical Dissolved Oxygen Meter Kit

EcoSense Kit with ODO200 Probe and Case

EcoSense ODO200 is an optical-based dissolved oxygen meter ideal for DO sampling. The ODO200 Kit includes the Ecosense ODO200 meter, field cable, probe and carrying case.

YSI EcoSense ORP15A ORP Temperature Pen Tester

YSI EcoSense ORP15A ORP Temperature Pen Tester

ORP Temperature Pen Tester

The ORP15A is part of the EcoSense® family of products. The ORP15A offers accurate, low-cost measurement of ORP (absolute and relative) along with temperature.

YSI EcoSense pH100A Field Cable

YSI EcoSense pH100A Field Cable

Waterproof pH and Temperature Field Probe and Cable

Waterproof pH and Temperature Field Probe and Cable

YSI EcoSense pH10A Pen Tester

YSI EcoSense pH10A Pen Tester

pH Temperature Pen Tester

The pH10A is part of the EcoSense® family of products. It's the perfect instrument for economical spot sampling of pH and temperature in many applications including wastwater, surface water, aquaculture, hydroponics, pools, and education.

YSI EcoSense DO200A Dissolved Oxygen Meter

YSI EcoSense DO200A Dissolved Oxygen Meter

Dissolved Oxygen and Temperature Instrument

The DO200A is part of the EcoSense® family of products. The DO200A dissolved oxygen instrument offers fast dissolved oxygen response times in wastewater, surface water, and aquaculture applications.

YSI EcoSense ODO200 Optical DO Field Cable

YSI EcoSense ODO200 Optical DO Field Cable

Optical DO and Temperature Field Probe and Cable

Optical DO and Temperature Field Probe and Cable

YSI EcoSense pH100A Meter

YSI EcoSense pH100A Meter

pH, mV, Temperature. Instrument Only

YSI's EcoSense® product line of compact, handheld instruments includes the pH100A pH meter. For simple, one handed operation for pH readings or mV values and temperature the pH100A is a logical choice.

YSI EcoSense EC30A Sensor Kit

YSI EcoSense EC30A Sensor Kit

Sensor Kit, EC30A, Grey

Sensor Kit, EC30A, Grey

YSI EcoSense Form Fitted Carrying Case

YSI EcoSense Form Fitted Carrying Case

Carrying Case, Form-fitted, Clear & Black Vinyl (w/Shoulder Strap)

Carrying Case, Form-fitted, Clear & Black Vinyl (w/Shoulder Strap)

EcoSense Handhelds Soft Sided Carrying Case

YSI EcoSense Handhelds Soft Sided Carrying Case

Carrying Case, Soft Sided

The 485 soft-sided carrying case is ideal for the EcoSense handheld products.

YSI EcoSense Hard Sided Carrying Case

YSI EcoSense Hard Sided Carrying Case

Carrying Case, Hard Plastic w/Form Fitted Foam Insert

Carrying Case, Hard Plastic w/Form Fitted Foam Insert

YSI EcoSense Laboratory-Grade pH Electrode

YSI EcoSense Laboratory-Grade pH Electrode

pH Electrode and 1M Cable - Laboratory-Grade

pH Electrode and 1M Cable - Laboratory-Grade

YSI EcoSense Pen Tester Battery Kit

YSI EcoSense Pen Tester Battery Kit

Replacement Part,Battery Kit

Replacement Part,Battery Kit

910 COD Colorimeter

YSI 910 COD Colorimeter

Rugged, waterproof, single parameter instrument for the measurement of COD - Chemical Oxygen Demand

The YSI 910 COD colorimeter is ideal for any application. This portable instrument allows you to easily take readings for COD.

YSI EcoSense Pens Carrying Case

YSI EcoSense Pens Carrying Case

Carrying Case, Pens, Soft-sided

Carrying Case, Pens, Soft-sided

YSI EcoSense pH Cable Weight Kit

440 Cable Weight Kit

440 Cable Weight Kit

YSI EcoSense pH Electrode Simulator

YSI EcoSense pH Electrode Simulator

Electrode Simulator

Electrode Simulator

YSI EcoSense Temperature Probe

YSI EcoSense Temperature Probe

Temperature Probe and 1 M Cable

Temperature Probe and 1 M Cable

YSI Sensor Cap Kit, EcoSense ODO200

YSI Sensor Cap Kit, EcoSense ODO200

Sensor Cap Kit, EcoSense ODO200

Sensor Cap Kit, EcoSense ODO200

YSI Electrode Kit, pH10, Blue

YSI Electrode Kit, pH10, Blue

Electrode Kit, pH10, Blue

Electrode Kit, pH10, Blue

YSI Electrode Kit, pH10A, Grey

YSI Electrode Kit, pH10A, Grey

Electrode Kit, pH10A, Grey

Electrode Kit, pH10A, Grey

YSI Electrode, Double Junction, pH10

YSI Electrode, Double Junction, pH10

Electrode, Double Junction, pH10

Electrode, Double Junction, pH10

YSI ScienceLine Temp 135

YSI ScienceLine Temp 135

ScienceLine Temp 135, Temperature sensor, Stainless Steel, 120 mm, 2 banana plugs, NTC 30 kOhm.

ScienceLine Temp 135, Temperature sensor, Stainless Steel, 120 mm, 2 banana plugs, NTC 30 kOhm.

YSI ScienceLine Temp 136

YSI ScienceLine Temp 136

ScienceLine Temp 136, Temperature sensor, Glass, 120 mm, 2 banana plugs, NTC 30 kOhm.

ScienceLine Temp 136, Temperature sensor, Glass, 120 mm, 2 banana plugs, NTC 30 kOhm.

YSI TruLine ORP 50

YSI TruLine ORP 50

TruLine ORP 50, ORP electrode, Single Junction, Refillable, Glass shaft, 1 meter cable, BNC Connector.

TruLine ORP 50, ORP electrode, Single Junction, Refillable, Glass shaft, 1 meter cable, BNC Connector.

EXO Modbus Signal Output Adapter

YSI EXO Modbus Signal Output Adapter

Converts an EXO sonde signal into a Modbus protocol over RS-232 or RS-485.

This adapter converts an EXO sonde signal into a Modbus protocol over RS-232 or RS-485.
For DCP applications with a data logger, please see our EXO DCP Adapter.
Note: This product is intended for use in a long term monitoring system. Requires an EXO Sonde, data logger, and flying lead cable to function.

Buoy - Vertical Profiling System

YSI 6952 Buoy - Vertical Profiling System

Designed for coastal applications or high energy environments

The YSI 6952 Buoy - Vertical Profiling System offers user-programmable sample intervals, redundant error recovery logic that detects unexpected activity and recovers automatically, and is compatible with all YSI EXO and 6-Series sondes equipped with depth.

EXO2 Central Wiper

YSI EXO2 Central Wiper

For use with the EXO2 platform only. Does not function on its own.

Monitor without interruption and reduce biofouling

The EXO2 Central Wiper occupies the central port on an EXO2 sonde, and is used to keep the payload sensor faces clean during long-term deployments. There's no escaping biofouling in underwater measurements. To keep it from interfering with data, an EXO2 sonde can be equipped with this anti-fouling wiper to prolong deployments and improve data accuracy.

Storm 3 Datalogger

YSI WaterLOG Storm 3 Datalogger

Central Data Collection Platform

The Storm 3 Data Logger incorporates a balanced set of inputs for analog, digital I/O and SDI-12 smart sensors to allow communication through cellular modems and GOES satellite. You'll love how easy it is to configure and collect data using the browser-based graphical user interface (GUI) with all standard web browsers on PCs, tablets and smart phones.

PRO30

YSI Pro30 Conductivity, Salinity Meter

Field Conductivity / Salinity / Specific Conductance / TDS Meter

The Pro30 provides everything you need in a handheld meter that measures salinity, conductivity, specific conductance, total dissolved solids, and temperature. Rugged, simple and reliable.

PRO10 handheld pH or ORP meter

YSI Pro10 pH / ORP Meter

Handheld Field pH / ORP Meter

The Pro10 provides everything you need in a handheld meter that measures temperature along with either pH or ORP (redox). Rugged, simple and reliable. Measure pH or ORP, and temperature.

PRO20 Handheld DO Meter

YSI Pro20 Dissolved Oxygen Meter

Lab / Field Dissolved Oxygen (D.O.) Meter

The Pro20 provides everything you need in a handheld dissolved oxygen meter. Ruggedness, simplicity and reliability are the cornerstones of the instrument's design.