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Original factory packaging
Service Hotline：
(+86)010-52867771
Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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User's Manual Datasheet
The MantaRay is a portable area velocity meter that measures flow using a submersible ultrasonic sensor. The unit is designed for flow surveys in open channels, partially-full sewer pipes, and surcharged pipes – making the portable open channel flow meter suitable for sewer monitoring, industrial flow monitoring, irrigation flow, and natural streams.
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, making it resistant to build-up and fouling.
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. To indicate that sleep mode has been activated, the digital display flashes every few seconds while sleeping.
External Battery Input
Connect external 12 or 24 V DC batteries to extend the MantaRay’s operating time indefinitely. Or connect the battery charger supplied with each flowmeter for continuous operation or long-term 4-20mA output and relay operation.
Suitable for Portable Flow Monitoring
Because of the portability of the MantaRay, the unit is ideal for applications such as flow verification, sewer flow monitoring, and reporting, industrial effluent monitoring, stormwater monitoring, natural streams, and irrigation water.
Features
Measures flow in partially filled pipes and open channels
No flume or weir required
4-20 mA 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
Specifications
| Channel Types | Round pipe, rectangular, trapezoid, egg, or custom shapes |
| Electronics Enclosure | IP 67 polycarbonate |
| Accuracy |
Level: ±0.25% of range or 1 mm (0.04 in). Velocity: ±2% of Reading Repeatability & Linearity ±0.1% |
| Display | White, back-lit 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, 12 V DC, 10,000 mAh |
| Battery Charger | 6 A (100 W Max), 100-240 V AC 50/60 Hz input, UL and CE listed |
| Outputs/Communications |
4-20mA, 500 ohms or 0-5 V DC (100mA) by menu selection 2 solid-state Relays, 40 V AC/DC max., rated 250 mA; programmable for flow and/or level alarm or flow proportional pulse (sampler/totalizer, Max frequency 0.4 Hz) |
| Breakout Box | Connections for charger input, external battery input, 2 relays, 4-20mA (0-5 V) |
| Electrical Surge Protection | Sensor, 4-20mA outputs, and AC power input |
| 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 sec, 30 sec, 1 min, 2 min, 5 min, 10 min, 15 min, 30 min, 60 min |
| Software | Greyline Logger for Windows. Graph and data table presentation, level/velocity to flow conversion, exports data to Excel, exports graphs |
| Approximate Shipping Weight | 6.8 kg (15 lbs) |
| QZ02L Sensor Specifications | |
| Spec name: | Description: |
| Velocity Measurement Range | 0.031 m/s to 6.2 m/s (0.1 ft/s to 20 ft/s) and reverse flow to -1.5 m/s (-5 ft/s) |
| Level Measurement Range | Minimum Head: 25.4 mm (1 in). Maximum Head: 4.57 m (15 ft) |
| Operating Temperature | -15 °C to 80 °C (5 °F to 175 °F) |
| Exposed Materials | 316 stainless steel, epoxy resin, polyurethane |
| Sensor Cable | 7.6 m (25 ft) submersible polyurethane jacket, shielded, 3-coaxial |
| Sensor Mounting | Includes MB-QZ stainless steel mounting bracket |
| Temperature Compensation | Automatic, continuous |
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