Product images：
Working principle：
SCJ-LL21 radar flowmeter is an integrated flow measurement product that combines radar speed measurement and radar water level measurement; The non-contact measurement of flow velocity is based on the principle of Doppler effect. The internally integrated velocity radar sensor emits a constant frequency signal towards 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 emitted frequency with the frequency of the reflected signal from the water surface, the velocity of the water flow can be determined. The integrated radar flowmeter points towards the water surface at a specific angle, so angle correction must be performed. SCJ-LL21 uses an internal sensor to measure its vertical inclination angle and automatically performs angle correction; Using frequency modulated continuous wave technology to measure water level; Internally integrated signal processor, proprietary flow rate calculation algorithm, can quickly and accurately calculate water flow rate and water level without calibration or drift. Made of aluminum alloy processing and integrated molding, with a protection level of IP68, it can work stably in humid environments and will not cause equipment damage even when submerged in water.
main features ：
1. Adopting imported Doppler radar antenna for high-precision flow velocity measurement;
2. Depending on the on-site environment, a 7m or 60m radar water level gauge can be optionally equipped;
3. Compact in size, lightweight, and equipped with a dedicated bracket for easy installation;
4. Standard RS485 interface, with long communication distance;
5. The flow rate range can be configured to achieve the best match between sampling accuracy and speed;
6. Supporting configuration programs make debugging and configuration easier;
7. High accuracy of flow velocity measurement, no drift, and no need for calibration;
8. IP68 waterproof rating ensures reliability in humid environments and will not be damaged even when submerged in water;
9. Small in size, easy to install, non-contact flow measurement, unobstructed for water bodies;
10. It can be matched with our company's telemetry terminal to achieve remote data transmission, and provide a free platform to view data;
Main technical parameters：
Power supply range | direct-current 12V/24V（the limit DC 9-28V）recommendation DC12V |
Working current | average current<27mA @ DC12V 25℃ |
operation temperature | -30℃~70℃ |
storage temperature | -40℃ ~85℃ |
| flow rate range | 0-65m/s (Scope can be set 0-18m/s;0-36m/s;0-65m/s),default 0-18m/s |
| Flow velocity accuracy | 1%(within 1m accuracy±1cm/s) |
Flow rate 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 |
working temperature limit | -35℃~80℃ |
Interface | RS485 interface(BAUD 9600,8,N,1) ,Effective transmission distance1000m(>300m Need to connect an external 150 Ω matching resistor) |
Communication protocol | standard Modbus-RTU agreement,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) |
Installation method：
Application Cases：
