AVFM 5.0 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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AVFM 5.0 area-velocity flow monitor flow through open channels, partially full sewer pipes and surcharged pipes without a flume or weir. Ideal for storm water, combined effluent, raw sewage, irrigation water and streams. Calibration is simple: enter the pipe diameter or channel shape and the AVFM 5.0 computes the flow volume and displays the flow rate. Measure forward and reverse flow and calibrate to channels of any shape.

 The AVFM 5.0 uses a submerged ultrasonic sensor to measure both velocity and level in the channel. The sensor is completely sealed with no orifices or ports. It mounts inside a pipe or at the bottom of a channel.

The AVFM 5.0 is recommended for pipe diameters greater than 6" (150 mm). Maximum pipe diameter or channel width should not exceed 10 ft. (3 m) unless flow velocity is evenly distributed across the channel width. Avoid sensor mounting locations where sediment builds up and locations where there is an elevation drop or bend immediately upstream from the sensor. Maximum pipe or channel slope should not exceed 3%.

The AVFM 5.0 measures flow velocity from 0.1 to 20 ft./sec (0.03 to 6.2 m/sec) and reverse flow up to 5 ft./sec (1.5 m/sec).

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