The open channel flowmeter is based on the flow velocity-water level calculation method, and adopts advanced flow velocity measuring instruments and water level measuring instruments to ensure the accuracy of speed measurement and calculation. It is required to adopt the mathematical model of single probe method or multi-probe method for open channel flow measurement.
The microprocessor in the intelligent open channel flow system display instrument calculates according to the actual water level measured by the water level gauge and the channel geometric dimensions, slope coefficients, channel accuracy, hydraulic ramps, and vertical plane correction coefficients of flow velocity according to the predetermined mathematical model. Flow out of the channel.
The working principle of the open channel flowmeter is to use the open channel technology to measure the fluid level height, and then calculate the flow rate through the internal microprocessor of the instrument. Because it is a non-contact measurement, the open channel flowmeter can be used in harsher environments. The open channel flowmeter transmits and receives the open channel under the control of the microcomputer, and calculates the distance between the open channel flowmeter and the measured liquid level according to the transmission time, thereby obtaining the liquid level height. Because there is a certain proportional relationship between the liquid level and the flow rate, The liquid flow rate Q can be finally obtained according to the calculation formula.
1. This product has built-in GPRS and Wifi to realize the Internet of Things;
2, backup and restore setting parameters;
3, can measure the level, liquid level, volume, flow, etc.;
4. The analog output can be adjusted arbitrarily;
5. With digital filtering and echo recognition functions;
6. The fixed interference filtering function can be manually set;
7, support Bluetooth, GPRS communication, etc. (selected when ordering);
8. Support custom serial port data format (selected when ordering);
9, support custom mathematical function operations;
10, support custom sound velocity (special substance measurement);
11. Support MiniSD card data collection (selected when ordering);
12. Support USB output (selected when ordering);
13. Support micro printer (selected when ordering).
2m、5m、8m、10m、12m、15m、20m、25m、30m（Select when ordering）
0.3-1.5m (different from the range)
Less than 12° (different from sensor)
Chinese and English large screen LCD, color screen TFT (optional)
Minimum display resolution
Automatic temperature compensation
20 KHz～200KHz (different depending on model specifications)
Finish by pressing the keys of the machine
Factory calibration, can be calibrated on site
Can switch between Chinese and English automatically
Output (selected when ordering)
Analog signal output, 4～20mA (standard configuration), 0～20mA, 0～5V, 0～10V load>300Ω
RS485, HART protocol, GPRS, MiniSD card data acquisition, USB (selected when ordering)
4-channel relay output
Relay contact capacity: AC: 5A 250V DC: 10A 120V
Working voltage, AC220V or DC12-24V
Host outline size, 240mm×184mm×110mm /256mm×175mm×110mm
ABS engineering plastics/cast aluminum
10m shielded cable (any length can be customized)
ABS engineering plastics, nylon
Φ65mm×119mm×G1 1/2(2m Range)
Sensor installation interface
G1 1/2(2m Range),M60×2（5m-15m Range）
M30X1.5 or DN80 non-standard flange (20m-30m range)
IP65 (higher protection level can be customized)
EX[ia]IIBT4 (select when ordering)
Temperature and pressure
≤80%RH without condensation
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