Online Doppler flowmeter
Online Doppler flowmeter
- Industrial stainless steel and industrial plastic materials, waterproof, anti-corrosion, strong and durable;
- No loss parts, less maintenance, low cost of use;
- High resolution, high measurement accuracy;
- The sensor has a service life of more than 5 years;
- Not afraid of interference from chemical reagents, liquid viscosity and other factors;
- Touch screen operation, English menu;
- 4~20mA isolated current output;
- Isolated Modbus RS485 and RS232 communication interface;
- Upper and lower limit alarm and timing function relay output;
Product Overview：
Acoustic Doppler ultrasonic flowmeter is a flow velocity and flow detector used in rivers, open channels and pipelines. It uses ultrasonic detection technology, has high measurement accuracy, high stability, is less affected by environmental factors, has no rotating parts, low maintenance frequency, and high working reliability. It is the preferred product for online measurement and portable measurement.
Principle: Doppler effect, the frequency difference between transmission and reception is related to the flow velocity, the time difference between ultrasonic transmission and reception is related to the liquid level, the static pressure liquid level is used for special working conditions, and the ambient temperature measurement is used to correct the actual propagation speed of the ultrasonic wave.
Application：
River and open channel monitoring: Online Doppler flowmeter can be used to monitor water flow velocity and flow in natural rivers and open channels, helping water conservancy departments know the water resource conditions and conduct water resource management.
Urban drainage network: Doppler flowmeters are often installed in urban drainage networks, such as under sewage manhole covers, and fixed to drainage pipes through brackets. Real-time monitoring of drainage pipe flow ensures the normal operation of the drainage system.
Chemical production: In the chemical production process, the flow of various liquids or gases needs to be accurately measured and controlled. The high accuracy and fast response characteristics of Doppler flowmeters make them an ideal choice for chemical production.
Product Parameter：
Transmitter:
| Dimension | 231×185×119mm |
| Weight | 1.3kg |
| Storage temperature | -40℃~60℃ |
| Ambient temperature | -20℃~ 60 °C Avoid direct sunlight |
| Relative humidity | 5%~85%（No condensation） |
| Protection level | IP65 |
| Power supply | 220VAC±10%，50Hz |
| Analog output | 4~20mA output (dissolved oxygen value or saturation, 20mA can be set to measure), loop load up to 750Ω; optional temperature 4~20mA output |
| Relay output | 2 relays, capacity 220 VAC / 5 A, outputs can be set as alarm or timing functions |
| On-site display | 5-inch touch screen with backlight
|
| On-site display | RS232 and RS485 interfaces, Modbus protocol |
Sensor：
| Dimension
| 164×50×29.5mm |
| Flow velocity index | Range -10m/s～10m/s; Resolution 0.001m/s; Repeatability ≤0.002m/s |
| Flow velocity accuracy | 1% FS |
| Ultrasonic level index | Range 0~6.5m; Resolution 1mm; Accuracy +-1mm |
| Pressure level index
| Range 0~10m; Resolution 1mm; Accuracy ±0.25% FS
|
| Temperature | Range -20℃～60℃; Accuracy 0.5℃ |
| Response time | Less than 30 seconds |
| Temperature sensor | Working range: 0~60°C; Resolution: 0.01°C Accuracy: ±0.5°C; Response time: less than 30 seconds |
| Storage temperature | -20℃~60°C |
| Ambient temperature | -20°C ~60°C |
| Medium temperature | 0℃~50℃ |
| Maximum installation depth | 10 m |
| Chemical compatibility | Methanol and ethanol are safe, avoid other organic solvents |
| Calibration | It has been calibrated at the factory and generally does not need to be calibrated again. |
| Sensor housing | Plastic and stainless steel |
| Weight | <1kg |
| Sensor cable | Standard 10 meters |
