RVFM-2-W Surface Flow Velocity Meter

The RVFM-2-W flow meter uses radar technology to provide precise contactless measurement of surface flow velocity.

  • Features
  • Specifications

The RVFM-2-W Surface Flow Velocity Meter uses radar technology to provide precise contactless measurement of surface flow velocity.

Contactless radar technology enables quick and simple sensor installation above the water surface, and requires minimum maintenance.

The RVFM-2-W flow meter is used to monitor flow velocity of open channels such as rivers, irrigation channels or sewer systems, and for monitoring and control of hydropower plants and wastewater treatment plants.

The flow meter is also suitable for various mass flow metering applications in mining processing plants, industrial installations, and, due to operation without moving parts and robust mechanical design, is ideal for measurement of flammable fluids and harsh chemical applications.

Surface Velocity Radar Type K-band 24.125 GHz Doppler radar, 21 dBm EIRP
Surface Velocity Radar
Beam Angle
12° Azimuth
24° Elevation
Level Radar Type W-band 77-81 GHz FMCW radar
Level Radar Beam Angle 12°
Detection Distance 15 m / 30 m
Speed Range 0,02 m/s to 15 m/s
Speed Resolution 0,001 m/s
Speed Accuracy 1%
Level Resolution 0.5 mm
Level Accuracy +/-3 mm
IP Rating IP68
Power Input 9 to 27 VDC
Power Consumption <6,5 W (typical 5,2 W)
Maximal Current < 750 mA
Temperature Range -40°C to +85°C
(without heating or coolers)
Device Outer Dimensions 150mm x 200mm x 250mm
Serial Interface 1 x serial RS-485 half-duplex
1 x serial RS-232 (two wire interface)
Baud Rate 1200 bps to 115200 bps
Serial Protocols Modbus/RS-485, GLX-NMEA, ASCII-S other available on request
SDI-12 Interface Available as optional add-on module
Analog 4-20 mA Interface Available on request
EN 50293:2000
EN 61000-6-2, EN 61000-6-4:2007
EN 61000-3-2:2006+A1:2009+A2:2009, EN 61000-3-3:2008
EN 300 440-1, EN 300 440-2
FCC Part 15 Subpart C

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