Executive standard: ISO4064-2014GBT778-2018 Measured fluid: Watersewageseawater(Measuring other liquids requires customization)Ensure that water fills the pipe Fluid temperature: 0.1-30 Working environment: Temperature-30-45Humidity100%( RH ) Working pressure: 1.6MPa Pressure loss: No pressure loss Sensitivity level of upstream flow field: U5 Sensitivity level of downstream flow field: D3 Climate and mechanical safety leve: Level C Electromagnetic compatibility level: Level E2 Communication interface: RS485\/USART\/Infrared interface,optional M-BUS, NB-IOT wireless transmission Output signal: Optional OCT Power supply: Built-in lithium battery\/External DC 8-24V power supply Protection level: IP68 Local display: Two lines show 9-bit cumulative flow,6-bit instantaneous flow,various status prompts and units Data storage: Lithium battery power is required for storing parametersIt can automatically record the cumulative flow of 31 months and the daily flow of the 32nd month. Flow measurement period: Application status:once\/second;Verification status:4times\/second Power consumption: Standard status:\u0026lt;30uA,The longest working time of a battery can be more than 15 years. Material: Measuring tube:nylon+GF;Sensor:PEEK;Housing:ABS Features: High measurement accuracy. IP68 waterproof grade. Low power consumption, battery power supply. UV protection, sturdy shell, long lifespan. Independent probe, stable and reliable operation. Only 2 inch (50.8mm) thickness, save installation space. Support monitoring by mobile phone, Ipad, computer. NB-lot module wireless network Communication: RS485\/USART\/Infrared Optional: M-BUS, NB-lot, OCT Package Included: 1 x Ultrasonic Water Meter