AVMS 5.1 Multi-Sensor Area-Velocity Flow Monitor

  • Sensor Protection
    IP68 for continuous submersion in liquids.
  • Flow Calculation
    Multiple sensors measures velocity and level to calculate the flow.
  • Datalogger
    Built in 2 million point datalogger
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Measures velocity and level to monitor flow with multiple ultrasonic sensors. Monitor flow through large open channels, partially full sewer pipes and surcharged pipes without a flume or weir. Designed for municipal storm water, stream flow, irrigation water, raw sewage, sluiceways, water intake channels, cooling water discharges and industrial effluent.

The AVMS 5.1 uses three submerged ultrasonic sensors to continuously measure both velocity and level in the channel. It is recommended for large channels or applications where velocity will vary across the width of the channel.

The sensors resist fouling, corrosion and abrasion. The flowmeter can be configured with three standard submerged velocity-level sensors, or with three submerged velocity plus a separate non-contacting ultrasonic level sensor.

AVMS 5.1 system overview      

The AVMS 5.1 area-velocity flow meter measures level and average velocity from multiple sensors to calculate flow in open channels or pipes. The system includes the AVMS 5.1 flowmeter with interconnect cable to a multi-sensor enclosure plus three submerged ultrasonic sensors.

The ultrasonic velocity sensors mount in the channel in positions where they will be submerged. Stainless steel mounting brackets are included. The sensors are completely sealed with no orifices or ports. Level is measured by connecting the built-in level sensor from any one of the three velocity sensors, or with an optional non-contacting ultrasonic level sensor.

Channels of any shape can be monitored. Forward and reverse flow can be measured and totalized. View flow rate and total flow on the large backlit LCD display and connect to external devices with three 4-20ma outputs and two control relays. The AVMS 5.1 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 

Watertight and dust tight NEMA4X (IP 66) polycarbonate with shatterproof covers

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%
Display White, backlit matrix - displays flow rate, totalizer, relay states, operating mode and calibration menu
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

Monitor flow through large open channels

Partially full sewer pipes and surcharged pipes without a flume or weir

Designed for municipal storm water, stream flow, irrigation water, raw sewage, sluiceways, water intake channels, cooling water discharges and industrial effluent.