Standard: ISO4064-2014, GBT778-2018 Fluid Measured: Water, seawater (Custom setup for other liquids) Pipe Requirement: Must be filled with water Fluid Temperature Range: 0.1-30��C Operating Environment: Temperature -30 to 45��C, Humidity 100% (RH) Working Pressure: 1.6MPa Pressure Loss: None Upstream Flow Sensitivity: U5 Downstream Flow Sensitivity: D3 Safety Levels: Climate and Mechanical - Level C; Electromagnetic Compatibility - Level E2 Communication Interfaces: RS485/USART/Infrared, optional M-Bus, NB-IOT wireless Output Signal: Optional OCT Power Supply: Built-in lithium battery or external DC 8-24V Protection Level: IP68 Local Display: Two lines showing 9-digit cumulative flow and 6-digit instantaneous flow, status prompts, and units Data Storage: Requires lithium battery for parameters; stores cumulative flow for 31 months and daily flow for the 32nd month Flow Measurement Frequency: Application status: once/second; Verification status: 4 times/second Power Consumption: Standard mode <30��A, battery lasts over 15 years Materials: Measuring Tube - Nylon + GF; Sensor - PEEK; Housing - ABS Features: High accuracy, IP68 waterproof, low power consumption, UV protection, durable construction, independent probe for stable operation, compact size (2-inch thickness), mobile phone/iPad/computer monitoring support, NB-IOT wireless communication Included: 1 x Ultrasonic Water Meter