product images：
Product Introduction
SCJ-LL01 is a contact flow measurement device suitable for open channels, full pipes, non full pipes, and natural rivers. The device has the advantages of easy installation and operation, high precision, low power consumption, and maintenance free.
working principle
The working principle of Doppler ultrasonic flowmeter. The transmitting transducer t emits ultrasonic waves of a certain frequency to the bubbles and solid particles in the flowing liquid, generating scattered waves. The scattered waves are received by the receiving transducer r, and their frequency changes are proportional to the movement speed of the particles (or bubbles) (due to the directional nature of the transducer, the received scattered signals are basically emitted from near the center of the pipeline). The relationship between Doppler frequency shift d and flow velocity is shown in the following equation: Doppler ultrasonic flowmeter, which consists of an ultrasonic flow transducer and a controller. The dual frequency Doppler flowmeter is a newly emerged product, whose controller causes the transducer to intermittently generate two continuous wave acoustic signals of different frequencies for a short period of time.
Main features
Internally integrated pressure water level gauge, no need for external water level gauge, achieving integrated monitoring of water level, flow rate, and water temperature;
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 the reliability of underwater operation;
Compact size, easy installation, and less obstruction to water bodies;
Can be paired with our company's telemetry terminal to achieve remote data transmission, while providing a free platform to view data;
Application scenarios
Mainly used for urban drainage networks, sewage discharge, natural rivers, open channels, reservoir inlet and outlet, sponge cities, scientific research, etc
Main technical parameters
Power supply range: DC 12V/24V (maximum DC 6-28V), recommended DC12V
Working current:<45 mA @ DC12V 25 ℃
Working temperature: 0 ℃~60 ℃
Storage temperature: -40 ℃~85 ℃
Flow velocity range: 0-12m/s (adjustable range 0-4m/s; 0-6m/s; 0-8m/s; 0-12m/s)
Flow velocity accuracy: 1% (accuracy within 1m is 1cm/s)
Flow velocity resolution: 1mm/s
Water depth range: 0-10m
Water depth accuracy: ± 0.5%
Depth resolution: 1mm
Water temperature range: 0 ℃~60 ℃
Water temperature accuracy: ± 0.5 ℃
Waterproof rating: IP68
Working power consumption:<0.5W @ DC12V
Power protection: anti reverse connection protection, electrostatic discharge protection
Extreme working temperature: -30 ℃~70 ℃
Communication interface: RS485 interface (baud rate 9600,8, N, 1), effective transmission distance 1000m (>300m requires an external 150 Ω matching resistor)
Communication protocol: Standard Modbus RTU protocol, function code
Compensation methods: sound speed compensation, user parameter compensation
Installation method：
Installation case：
