Radar based non-contact open channel flowmeter

1Equipment Composition

IIEquipment principle

The radar flowmeter measures the surface velocity of the water flow, the ultrasonic water level gauge measures the water depth, and the upper computer uses the pre input cross-sectional dimensions to

Utilizing HydraulicsThe model calculates the cross-sectional flow rate.

When there is a full pipe situation, it is necessary to add an immersion Doppler flowmeter, as shown in the following figure:

IIIApplication scope

Channels and Rivers
Urban drainage network
Underground rainwater pipe network
Agricultural irrigation
Enterprise pollution discharge

4equipment installation

Radar flowmeter parameters:

1. General parameters
Sensor model: SI-3L special application radar sensor
Measurement accuracy: ± 0.1 (measurement unit: m/s or km/h, etc.)
Operating environment: -30 ℃ -70 ℃
Radar band: K-band
Communication interface: RS232 rainproof 6-core connector
Shell: Aluminum and polycarbonate
Environmental humidity: 100%
Data output port: 16 optional data interfaces, default Com 1
Power supply voltage: 12VDC
Low end speed measurement range: 0.1-20 fps (0.1-6.1 m/s)
High end speed measurement range: 0.2-65 fps (0.2-20 m/s)
Target acquisition time:<1 second


2. Mechanical parameters
Dimensions (width and height): 17.78 cm * 16.8 cm * 3.3 cm
Weight: 0.793 kg


3. Power parameters
Supply voltage range: 10.8 VDC -24 VDC
Low voltage shutdown threshold: 10.8 VDC
Maximum current consumption: 175 mA
Typical working current: 150 mA @ 12VDC
Impulse current requirement: 250 mA


4. Microwave parameters
Microwave frequency range: 24.075 GHz – 24.175 GHz
Beam width: 6.5 ° * 5.5 ° @ -3dB power point
Polarization method: linear polarization
Power spectral density: 114.3 dBuV/m @ 3 m
Power output: 20dBm
Horizontal sideband suppression: 15db
Vertical sideband suppression: 15db