Passive duct temperature sensors for measuring the air temperature in ducts.
The QAM21 series are passive duct temperature sensors for HVAC applications such as supply/return air temperature control, limit sensing, reference sensing, dew‑point measurement, and measurement functions. The sensors use Pt100, LG‑Ni 1000 or T1 (PTC) elements and are supplied with interchangeable plastic housings and optional installation flanges.
The manual provides detailed installation instructions, wiring options, climate and transport condition limits, and technical specifications including measurement range, time constant, response time, and available sensor‑element lengths.
| Measurement range | −50 °C to +80 °C |
|---|---|
| Time constant | 30 s |
| Response time at 2 m/s | < 1 s |
The sensor measures temperatures from –50 °C up to +80 °C.
The response time is less than 1 second at 2 m/s.