YSI 6431AF Anti-Fouling Blue-Green Algae Sensor

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

  • Features
  • Specifications

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

Copper-based parts on the YSI 6431AF Blue-Green Algae Sensor repel aquatic growth on sensors, extending deployment periods.

Blue-green algae (a. k. a. cyanobacteria) monitoring is of growing interest due to the problems some species can present through the production of toxins and compounds that deteriorate the quality of drinking water and through the formation of blooms. Blue-green algae are of interest for ecosystem studies and monitoring as well, where they may represent the most abundant primary producer.

Features include:

  • Designed for freshwater (phycocyanin) environments
  • Optimized for excellent sensitivity for monitoring algal populations at natural levels
  • Insensitive to potential interference including chlorophyll, turbidity, and dissolved organics

The YSI 6431AF blue-green algae sensor is fully compatible with all YSI 6-series sondes equipped with optical ports.

YSI's optical sensors use an integrated wiping system to provide anti-fouling in the most hostile environments. Durable mechanical features include a non-corroding titanium wiper shaft, replaceable wiper shaft seal, and a new switch controlled wiper parking system to prevent mis-parking.

Notable Specifications:

  • Range: ~0 to 280,000 cells/mL; 0 to 100 RFU
  • Detection Limit: ~220 cells/mL
  • Resolution: 1 cell/mL; 0.1 RFU
  • Linearity: R2> 0.9999
Anti Fouling Yes
Depth / Pressure Rating / Limit 200 m
Equipment used with 6600, ADV6600, 600OMS, 6920, 6600V2, 6820, 6920V2, 6820V2
Medium Freshwater
Monitoring Yes
Parameters Measured Blue-Green Algae (phycocyanin)
User Calibratable Yes
User Replaceable Yes
Warranty 2 years

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