Doppler flowmeter

NegotiableUpdate on 05/06

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The Doppler flowmeter sensor is designed based on the principle of Doppler effect and is used for non-contact measurement of liquid flow velocity (such as rivers, pipelines, etc.). By emitting high-frequency sound waves and receiving reflected signals, analyzing frequency offset (frequency shift) to calculate target flow velocity, it has the characteristics of anti pollution and low maintenance.

Product Details

Doppler flowmeter

1、 Product principle:

In the field of acoustics, when there is relative motion between the sound source and the receiver (i.e. probe and reflector), the frequency of the echo will change, and this frequency change is called frequency shift, or Doppler effect. The frequency of sound waves increases when moving towards the observer and decreases when moving away from the observer. Doppler flowmeter calculates flow velocity by calculating frequency changes.

2、 Technical parameters of Doppler flowmeter:

Power supply:DC10-15V

Working current:160-180mA

Sound wave frequency:2MHZ

blind area:10centimeter

Flow rate range:0.021m/s～6.00m/s(Customizable)12.00m/s），

Accuracy: ±1%±1cm/s

Water level: Range:0.03m～10m(Customizable)100m）Accuracy:0.3%±0.5cm

Water temperature: Range:-10℃～60℃, accuracy: ±1℃

Instantaneous flow range:1L/s～99.99m³/s

Cumulative traffic range:0.1m³～999999m³

Working voltage:DC7.2V～24V

3、 Typical applications

open channel/Pipeline flow monitoring

Flow rate control in sewage treatment plants

ocean/hydrologic research

4、 Installation instructions:

Normal installation ensures that it is below the lowest water level20CMTo avoid exposure to water

Doppler flowmeterSensor installation diagram:

多普勒流量流速仪

5 Wiring instructions:

Sensor red line	power supplyDC12V+
Sensor black wire	power supplyDC12V-
Sensor Green Line	RS485A
Sensor yellow wire	RS485B

Notes:

1Sensors need to avoid mud and collisions with objects such as stones. Grids should be installed in areas with abundant water and grass to prevent entanglement.

2The installation direction of the sensor, the sensor emission surface needs to be installed in the upstream direction.

3The sensor has a blind spot for sound waves, so try to ensure that the sensor is underwater as much as possible20Below centimeters(Sensors that are partially exposed to water or obstructed by sludge may produce false data, with a very low probability. Typically, large numbers of data such as2rice/For seconds or more, it is recommended to use sensors. Secondary developers can block high flow velocity values by adjusting the water level, or in practical applications where the water flow velocity is not as high, they can directly block values greater than2Flow velocity above meters.

4The cable ventilation pipe is not difficult to break, which affects water level measurement.

5Try to do a good job in signal and power lightning protection.

6If the sensor cable needs to be extended, it needs to be added485Relay. The power supply should avoid interference from the frequency converter.