AVFM 6.1 Area-Velocity Flow Monitor

  • Sensor Protection
    IP68 for continuous submersion in liquids.
  • Flow Calculation
    Single sensor measures velocity and level to calculate the flow.
  • Applications
    For partially filled and surcharged pipes
  • Datalogger
    Built in 2 million point datalogger
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The Greyline AVFM 6.1 Area-Velocity Flow Meter uses a submerged ultrasonic sensor measuring both level and velocity to calculate flow in an open channel or pipe. Measure flow through partially filled pipes, channels, canals, and turnouts without a flume or weir. Ideal for wastewater, stormwater, effluent, industrial wastewater, and irrigation water. Configuration is simple: enter the pipe diameter or channel dimensions and the AVFM 6.1 automatically computes and displays flow volume.

The ultrasonic sensor mounts inside the pipe or on the bottom of a channel with a stainless steel mounting bracket (included) and a single screw into the bottom of the pipe or channel. No special compounds, tools or hardware are required. The sensor is completely sealed with no orifices or ports.

General Specification
Transmitter Enclosure 

Wall-mount, watertight NEMA4X (IP66) enclosure with hinged, clear cover

Transmitter operating temperature: -20°C to +60°C
Outputs 3 isolated 4-20mA, 1000 ohm (Flow, Level and Velocity) or 0-5 vdc by menu selection
Data Logging Programmable, 2 million points
Accuracy Level: ±0.25% of Range. Velocity: ±2% of Reading. 
Repeatability and Linearity  ±0.1%
Sensor Specification
Pipe diameters range:

12.5 up to 4500mm

Measuring range 0.03 to 6.2 m/s
Operating temperature: -15°C to +65°C 
Exposed material PVC, epoxy resin, polyurethane
Sensor cable 25 ft. (7.6 m) submersible polyurethane jacket, shielded, 3-coaxial
Max. cable length Up to 152 meter

Sewer Flow Monitoring and Reporting

Industrial Effluent

Storm water Monitoring

Natural Streams

Irrigation Water