Product images :
Working principle:
The non-contact measurement of flow velocity is based on the principle of Doppler effect. The internal integrated velocity radar sensor transmits a constant frequency signal to the water surface at a specific angle. Due to the movement of the water body, the signal is reflected and changes frequency. The reflected signal is received by the antenna of the integrated velocity radar sensor. By comparing the transmitted frequency and the frequency of the reflected signal from the water surface, the speed of the water flow can be determined. The integrated radar current meter points to the water surface at a specific angle, so angle correction must be performed. SCJ-LL21 uses an internal sensor to measure its vertical inclination and automatically performs angle correction; it uses frequency modulated continuous wave technology to measure water level; the internal integrated signal processor and proprietary flow velocity calculation algorithm can quickly and accurately calculate the water flow velocity and water level, without calibration and drift.
Key Features:
Adopting imported Doppler radar antenna for high-precision flow velocity measurement;
According to the on-site environment, a 7m or 60m radar water level gauge can be optionally equipped;
Compact in size, lightweight, and equipped with a dedicated bracket for easy installation;
Standard RS485 interface, long communication distance:
The flow rate range can be configured to achieve the best match between sampling accuracy and speed;
The accompanying configuration program makes debugging and configuration easier;
The measurement accuracy of flow velocity is high, and there is no drift, no need for calibration;
IP68 waterproof rating ensures reliability in humid environments and will not be damaged even when submerged in water;
Compact size, easy installation, non-contact flow measurement, unobstructed for water bodies;
Can be paired with our company's telemetry terminal to achieve remote data transmission, while providing a free platform to view data;
Main technical parameters:
Power supply range
DC 12V/24V (maximum DC9-28V) Recommended DC12V
Working current
Average current<27mA @ DC12V 25 ℃ ①
working temperature
-30℃~70℃
Storage temperature
-40℃~85℃
Flow velocity range
0-65m/s (adjustable range 0-18m/s; 0-36m/s; 0-65m/s), default 0-18m/s ②
Flow velocity accuracy
1% (accuracy within 1m ± 1cm/s)
Flow velocity resolution
1mm/s
Depth range
0-60m or 0-7m
Depth accuracy
±3mm
Depth resolution
1mm
Waterproof grade
IP68
Power protection
Anti reverse connection protection, electrostatic discharge protection
Extreme working temperature
-35℃~80℃
communication interface
RS485 interface (baud rate 9600,8, N, 1), effective transmission distance 1000m (>300m requires)
External 150 Ω matching resistor ③
Communication Protocol
Standard Modbus RTU protocol, function code 03H
Frequency of flow measurement radar
24GHz
Beam angle of flow measuring antenna
Horizontal direction 12 °, vertical direction 25 °
Radar water level gauge radar frequency
76-81GHz
Radar water level gauge antenna beam angle
Omnidirectional 6 °
size
160x100x95mm
weight
1.86Kg (excluding cables and brackets)
Bracket installation:
Application examples:
