MantaRay Portable Area-Velocity Flow Meter

  • Data Logger Capacity‚Äč
    2 million point data logger with USB output to flash drives
  • Accuracy
    Level: ±0.25% of Range
  • Measurement Level and Velocity
    Velocity Measurement Range: 0.03 to 6.2 and reverse flow to -1.5 m/sec
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The MantaRay Portable Area-Velocity Flow Meter measures flow in open channels, partially filled and surcharged pipes using an ultrasonic sensor. It's designed for monitoring storm water, sewage, industrial effluent, irrigation water and natural streams. The MantaRay displays and data logs flow rate and total flow and connects to samplers, SCADA and telemetry systems.

Calibration is simple: enter the pipe diameter or channel dimensions and the MantaRay automatically computes and displays the flow rate and total on its backlit LCD display. Mount the sensor at the bottom of the pipe or channel and hang the IP67 electronics case above the high water level.

The MantaRay uses a submerged ultrasonic sensor to continuously measure flow or reverse flow in open channels, partially filled or surcharged pipes. The sensor is a completely sealed ultrasonic unit with no orifices or ports. It is hydro dynamically shaped and designed to shed deposits and stringers for reliable operation in sewage, storm water and stream flow applications.

The QZ02L sensor mounts inside the pipe or at the bottom of an open channel. No special compounds, tools or hardware are required. A stainless steel mounting bracket is included and a size range of optional pipe bands are available for sensor installation in manholes.

The MantaRay stores up to 2-million data points including level, velocity and water temperature. For reduced power consumption during flow surveys you can activate the MantaRay's "sleep mode" to conserve energy for extended operation.

The MantaRay's built-in, rechargeable batteries power the flow meter. You can also connect external 12 or 24VDC batteries to extend the MantaRay's operating time indefinitely. Or connect the battery charger (supplied) for continuous operation with 4-20mA and relay operation.

General Specification
Transmitter Enclosure 

Watertight, airtight, dust proof ( 67) polycarbonate

Transmitter operating temperature: -20°C to +60°C
Display LCD displays: Level, Velocity, Water Temperature, Battery and Memory capacity
Power  4 Alkaline 'D' cell batteries
Outputs USB
Data Logging Programmable, 130,000 data points
Accuracy Level: ±0.25% of Range. Velocity: ±2% of Reading 
Repeatability and Linearity  ±0.1%
Sensor Specification
Level Measurement Range

Minimum Head: 1 in (25.4 mm). Maximum Head: 15 ft. (4.5 m)

Velocity Measuring range 0.03 to 3.8 m/s
Operating temperature: -15°C to +65°C 
Exposed material PVC, epoxy, polyurethane
Sensor cable 25 ft. (7.6 m) submersible polyurethane jacket, shielded, 3-coaxial
Max. cable length Up to 152 meter
Temperature Compensation Automatic, continuous

Flow surveys in open channels, partially full sewer pipes

Surcharged pipes deal for storm water

Sewage irrigation water