Air Velocity Sensor with Display for Accurate Airflow Monitoring Designed for simplified setup, the MS2-W101 Air velocity Sensor With Display features dependable Hall Effect sensing. It provides adjustable voltage outputs (0–5 VDC / 0–10 VDC) and a consistent 4–20 mA current output. The device enables linear pressure, velocity, and expanded square-root flow measurement. Serving as an Air flow sensor, it performs well as a Duct air velocity detector and accurate Airflow measurement sensor for HVAC systems. Applications : Filter monitoring in AHUs, clean-room building pressure, commercial buildings, and fan proving.