ultrasonic open channel flow measurement

Parameter of ultrasonic open channel flow measurement :

Parameters:
1. Flow range: 0-10L/s (decide on specs of weir tank)
2. Accumulated flow: 12 decimal number, automatic back to zero after full
3. Accuracy: 1%
4. Measure range: 3m
5. Ranging accuracy: 0.25%
6. Level resolution: 1mm
7. Working temperature: -20~55℃
8. Protection class: Display part: IP65;Probe: IP65
9. Power supply: AC power supply 220V±10% 6W
10. Timing error of instrument: < 2min/month
11. Meter data storage: Storage records of 128/h, 64/day,32/month, 4/year, power down 64 records. Cycle use, it will cover the earliest records when the records are full.
12. Output: 4~20mA
13. Data output: RS485