Specially applied in oxygen concentrators. Ultrasonic principle
1. Accurancy: +/-2%
2. Max. Pressure: 138KPa
3. Max. Flow: 10liters/min. If more flow, you can add seprate flow meter
4. Low battery Voltage reminding
5. Power off automatially in 15min. Without signal
6. LCD purity display, betwiin 21.0~99.9%.