Portable Open Channel Flow Meter for Partially-filled Pipes and Open Channels
Designed for flow surveys in open channels, partially full sewer pipes and surcharged pipes. MantaRay is ideal for stormwater, sewage, irrigation water and natural streams.
Hydrodynamic Ultrasonic Sensor
The MantaRay uses a submerged ultrasonic sensor to continuously measure Velocity and Level in the channel. The sensor resists fouling, corrosion and abrasion. View real-time flow rate and total flow on the large backlit LCD display.
Connect to samplers, SCADA, and telemetry systems with the 4- 20mA and relay outputs. Download flow log files to a USB memory stick.
Easy to Use
The MantaRay Portable Area-Velocity Flow Meter measures both Level and Velocity to calculate flow in an open channel or pipe. 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.
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.
Recommended Pipe or Channel Conditions
Careful selection of sensor mounting location results in the best performance and maintenance-free operation. Avoid locations where sediment builds up.
The best possible accuracy will result when the water is not highly turbulent and the velocity is evenly distributed across the channel. The channel should not have drops or direction changes immediately upstream of the sensor mounting location, and the pipe or channel slope should not exceed 3%.
The MantaRay can measure forward flow velocity up to 20 ft/sec (6.2 m/sec) and reverse flow up to 5 ft/sec (1.5m/sec). The electronics and software sample and average flow rates continuously to provide stable readings.
The submerged velocity/level sensor will measure flow in partially full and surcharged pipes with pressure up to 10 psi. No special set-up or adjustment is required. Minimum recommended pipe diameter is 6″ (150 mm)
Built-in 2-Million Point Data Logger
Use the MantaRay to store time and date-stamped flow values at 10-second to 60-minute intervals. Daily flow reports are automatically created, and total, minimum, maximum, and average flow rates are displayed on the LCD display.
Transfer log files to any USB flash drive by connecting to the logger’s USB output. Windows software is included to display log files in graph and table formats, change measurement units and generate flow reports—export data to a graphic or text format or Microsoft Excel.
Sleep Mode for Extended Battery Life
Use the MantaRay’s ‘Sleep Mode’ function to extend battery life while logging flow. The digital display, outputs and non-essential functions are suspended during sleep mode.
Based on the logger interval, the MantaRay activates the sensor for 12 seconds to obtain flow readings and then resumes low power mode until the next logger sample interval. The digital display flashes every few seconds while sleeping to indicate that sleep mode has been activated.
External Battery Input
Connect external 12 or 24VDC batteries to indefinitely extend the MantaRay’s operating time. Or connect the battery charger supplied with each flowmeter for continuous operation or long-term 4- 4-20mA output and relay operation. Maximum power consumption is 2.7 Watts.
Capabilites
- Display, transmit, totalise, & Data log flow in open channels & pipes.
- Measures reverse flow
- Works in irregular channel shapes
