Features: Type of liquid:Single liquid can transmit ultrasound, such as water, sea water, sewage, oil, alcohol, etc. Velocity range:0~+/-12m/s, Bi-directional measurement. Linearity: better than 0.5%, Repeatability: better than 0.2%, Accuracy: better than 1%. Pipe size:DN15~DN6000mm. Connecting module and secondary meter through RS-485 interface, transmission distance up to 1000m. Specifications: Material: Plastic Size: 26x21.5x7cm/ 10.24x8.46x2.76 in Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Ultrasonic Flow Meter