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: