The Doppler open channel flow meter is online real-time measurement device for flowing water through open channel and pipe. It is permanent using and widely used for weirs & flumes, river, sewer lines, streams, partially filled pipe, etc. It can measure common type water (e.g. tap water, etc) and wastewater.

In the past, such Doppler open flow meter has been sold at very high price on the market. In order to make more projects utilize such flow meter, we have been working hard to develop the new generation with low price. It has been made on our latest technology which can ensure good performance with high cost-effective solution.

The Doppler flow meter is designed on the modular technology. It mainly has two parts: Doppler sensor and electronic converter. This design makes it easier for future maintenance.

The open channel flow meter can be equipped with versatile outputs, and the default is RS485 Modbus-RTU. There are relays output and 2 ways 4-20mA optional. For 4-20mA output, the default is for flow rate and can be set in related menu window. For the second 4-20mA output, it can be water velocity or water depth/level optional.

Unlike mechanical velocity sensor, Doppler flow sensor has no moving parts, thus it has long working life and better performance. Comparing with open channel flow on ultrasonic level, the Doppler open channel flow meter doesn’t require to build related flumes; it will save on-site installing fee and transportation fee. Thus, our Doppler open channel flow meter will be an ideal choice for your application of open channel and partial filled pipe, especially the price of our Doppler flow meter has been much lower.

Features and Benefits:

  • Precision measurement with high cost-effective solution (Low Price)
  • Permanent installing supports online real-time measurement
  • Multiple values test, including flow rate, total flow volume, velocity, depth/level, water temperature
  • IP68 class submerged installing, long-term stable performance
  • Flexible application range: wastewater treatment, storm water, sanitary sewer line, etc.
  • Can set to calculate flow rate and flow volume for often seen open channel and partial pipe
  • Versatile outputs are available, and the default is RS485 (Modbus-RTU). Relay output and 2 ways 4-20mA optional.

Main Parameters:

  • Power Supply: 24VDC; Solar rechargeable battery(12VDC/5w)
  • Velocity Measurement:  Range:0-5m/s(>0.02m/s); Accuracy: ±1%; Resolution:0.001m/s
  • Level Measurement: Range:0-10m(>0.02m); Accuracy: 1±%;  Resolution:0.001m
  • Instant Flow Rate Measurement: Range:  0-9999,999 m3/h; Accuracy: ±2%; Resolution:0.1m3/h
  • Water Temperature Measurement: Range:0-60℃ ; Accuracy: ±1℃; Resolution: 0.1℃
  • Display: LCD Screen window(Colorful)
  • Language: English
  • Keys: 5 local keys for operation and data inputting
  • Signal Output: RS485(Modbus-RTU); 4-20mA (for instant flow rate); another 4-20mA optional; Relay output(optional),Hart protocol(optional)
  • Protection Class: Doppler sensor(IP68); Flow converter (IP65)
  • Cable Length: 10m as default; Longer cable can made.
  • Working  Temperature: 0-60℃ ;

Note:
(1). The Max. velocity range can be 10m/s. Support customization.
(2). If use solar power supply, can use 12VDC(5W) with RS485 (Modbus-rtu) output
(3). The unit for instant flow rate can be L/s(Liter/second), US gallon/minute, m3/h(M3/hour)

A Typical Installing Case: