Greyline Mantaray Portable Area-Velocity Flow Meter


The Mantaray Portable Area-Velocity Flow Meter measures flow in open channels, partially filled and surcharged pipes using an ultraosnic sensor. The unit displays and datalogs flow rate and total flow and connects to samplers, SCADA and telemetry systems.

Calibration is simple: enter the pipe diameter or channle dimensions and the MantaRay automatically computes and displayes 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 hydronamically shaped and designed to shed deposits and stringers for reliable operation in sewage, stormwater 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 of range optional pipe bands are available for sensor installation in manholes.

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  • Measures flow in partially filled pipes and open channels
  • No flume or weir required
  • 4-20mA and Relay outputs for connection to Samplers and SCADA
  • Powered with built-in rechargeable NiMH batteries
  • 2 million point data logger with USB output to Flash drives
  • Backlit LCD display for flow rate, totalizer and menu system


Channel Types:Round pipe, Rectangular, trapezoid egg , or custom shapes
Electronics Enclosure:Watertight, airtight, dust proof ( 67) polycarbonate IP
Operating Temp. ( lectronics :-5° to 140°F (-20° to 60°C)

Level:  ±0.25% of Range . Velocity: ±2% of Reading or 1 mm (0.04”)

Repeatability and Linearity: ±0.1%

Display:White, backlit matrix - displays flow rate, totalizer, relay states, operating mode and calibration menu
Programming:built-in 5-key calibrator with English, French or Spanish language selection
Battery:internal rechargeable NiMH, 12VDC, 10,000 mAh
Battery Charger:6A (100W Max), 100-240VAC 50/60Hz input, UL and CE listed
Output : s/Communications

4-20mA, 00 ohm 5 or 0-5VDC (100 mA) by menu selection

2 solid-state 40V AC/DC max., 250mA Relays, rated ; programmable for flow and/or level alarm flow proportional pulse (sampler/totalizer )

Breakout Box:Connections for charger input, external battery input, 2 relays, 4-20mA (0-5V)
Electrical Surge Protection:Sensor, 4-20mA and AC power input outputs
Data Logger:Programmable 2-million point data capacity, time and date stamped plus formatted flow reports including Total, Average, Minimum, Maximum and times of occurrence. Includes USB output to Flash Drives
Logger Intervals:programmable 10, 30 sec, 1, 2, 5, 10, 15, 30, 60 min
Software:Greyline Logger for Windows. raph and data table presentation, level/velocity to flow G conversion ™ , exports data to Excel , exports graphs
Approximate Shipping Weight:1 lbs. ( kg) 5 6.8

Download Datasheet: Greyline Mantaray Portable Area-Velocity Flow Meter

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