Product Overview
The IN81 series  Air speed transmitter is used in HVAC environment. It can adapt to different probe rods. It can not only measure the point  Air speed, but also accurately measure the average  Air speed inside the pipeline. The hardware part is designed with high reliability, equipped with one key zero calibration button, and has no independent drift and temperature drift after installation. The software part adopts extremely high speed data sampling, which can quickly smooth out the accurate wind speed results.
Main technical indicators
Measuring range: optional within - 30~+30m/s
Accuracy: ± 1 ～ ± 20 m/s ± (0.2 m/s+2% * measured value), ± 2 ～ ± 30 m/s ± (0.2 m/s+3% * measured value) (at 20 ℃, 1013 hPa)
Signal output: current output type: 4 ～ 20mA (three wire system), electrical load ＜ 500 Ω
Voltage output type: 0 ～ 10V (three wire system), electrical load ＞ 10K Ω
485 output type: standard ModBus RTU
Power supply: 20~28VDC
Electrical connection: PG9, cable diameter: 4~8mm
Enclosure protection grade: IP65
Working pressure: less than 1 Bar
Working temperature: transmitter: - 40 ℃~+60 ℃; Probe rod: integrated φ 14 Aluminum probe rod: - 40~+80 ℃; Integrated φ 8 Stainless steel probe rod: - 40~+100 ℃;
Storage environment: temperature - 20 ℃～+60 ℃, humidity 0 ～ 85% RH
Circuit connection

Installation dimension drawing

Model Selection Table