HD403TS2 hotwire air velocity transmitter (omnidirectional probe, 4–20 mA)

A hotwire air velocity transmitter with omnidirectional probe for accurate low-speed airflow measurement.

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Product Description

The HD403TS2 Air Velocity Transmitter is designed for precise measurement of low air speed in applications such as ventilation ducts, clean rooms, HVAC systems, and indoor air quality monitoring.

Equipped with a hotwire sensor and omnidirectional probe, it provides reliable measurements independent of airflow direction, making it ideal for environments with variable or turbulent flow conditions. The measurement range of 0.1 to 5.0 m/s ensures high sensitivity at low air velocities.

With a 4–20 mA output, the transmitter integrates easily into control systems, PLCs, and building management systems. Its IP67-rated electronics housing ensures durability in demanding industrial environments.

Shown below are some photos of the HD403TS2 air velocity transmitters:

The HD403TS2 is used in an integrated indoor thermal comfort monitoring station (post):

View 1 of the station
View 2 of the station

The HD403TS2 is used in an indoor air velocity monitoring system (post):

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Additional information

Power supply 12-40 VDC or 24 VAC
Output 4-20 mA