RS485 4-20mA 0-5V 0-10V Pipeline Duct Type Air Volume and Air Speed Sensor Airflow Air Velocity Transmitter Introduction: This transmitter is designed to measure the wind speed in the pipeline. The high-precision wind speed measurement unit independently developed by our company is sensitive to reaction and can quickly and accurately measure small wind speeds. It has the characteristics of good stability, small drift and high precision. The transmitter can calculate the real-time air volume value according to the cross-sectional area of ​​the pipeline set for measurement. The pipeline type adopts the installation method, which is convenient for on-site installation. The product adopts anti-interference circuit design, which can withstand various strong electromagnetic interferences such as on-site frequency converters. The equipment adopts imported screw-free terminal wiring, which is more convenient to use. Features: 1. High-precision wind speed measurement unit, low starting wind speed, sensitive response, suitable for ventilation ducts, fume ducts and other harsh environments 2. Adopt the full-range secondary calibration method, with good linearity and high accuracy 3. Open-hole flange installation, high-quality silicone sealing ring, small air leakage, durable 4. The cross-sectional area of the measuring pipe can be set, and the real-time air volume value can be uploaded according to the set cross-sectional area of the pipe 5. 485 communication interface, standard Modbus-RTU protocol, communication address and baud rate can be set, and the communication line can be up to 2000 meters 6. The device address supports two methods: software configuration and DIP switch setting 7. The accuracy of the range 0~10m/s is ±(0.1+2%FS); the accuracy of the range 0~15m/s, 0~20m/s, and 0~30m/s is ±(0.2+2%FS) m/s 8. The wiring terminals use imported screw-free terminals, no tools are required, just press and plug to connect 9. Adopting special EMC anti-interference components, it can withstand various strong electromagnetic interferences such as on-site inverters 10. With wind speed direction marking, it is easy to install on site