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).
| Ranging range | 2m、5m、8m、10m、12m、15m、20m、25m、30m（Select when ordering） |
| Blind spot | 0.3-1.5m (different from the range) |
| Launch angle | Less than 12° (different from sensor) |
| Ranging accuracy | ±0.3%F.S |
| show | Chinese and English large screen LCD, color screen TFT (optional) |
| Minimum display resolution | 1mm |
| Temperature compensation | Automatic temperature compensation |
| working frequency | 20 KHz～200KHz (different depending on model specifications) |
| On-site setting | Finish by pressing the keys of the machine |
| Calibration | Factory calibration, can be calibrated on site |
| Language | 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 |
| Digital communication | 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 |
| powered by | Working voltage, AC220V or DC12-24V |
| Power consumption | <5W |
| Physical properties | Host outline size, 240mm×184mm×110mm /256mm×175mm×110mm |
| Host material | ABS engineering plastics/cast aluminum |
| Sensor cable | 10m shielded cable (any length can be customized) |
| Transducer material | ABS engineering plastics, nylon |
| Sensor dimensions | Φ65mm×119mm×G1 1/2(2m Range) |
| Φ74mm×137mm×M60(5m-15m Range) | |
| Φ110mm×194mm×M30(20m-30m Range) | |
| Sensor installation interface | G1 1/2(2m Range),M60×2（5m-15m Range） |
| M30X1.5 or DN80 non-standard flange (20m-30m range) | |
| Protection level | IP65 (higher protection level can be customized) |
| Explosion-proof grade | EX[ia]IIBT4 (select when ordering) |
| working environment | Temperature and pressure |
| Storage humidity | ≤80%RH without condensation |
