Duct Air Quality (VOC) Transmitters QDT-series

Duct Air Quality (VOC) Transmitters QDT-series

The duct air quality transmitters QDT-series is used to determine the air quality, based on a mixed gas sensor (VOC sensor).

The duct air quality transmitters QDT-series is designed to measure the air quality in offices, hotels, meeting rooms, convention centres,schools, airports, apartments, stores, restaurants etc.

Probe lenght for the duct air quality transmitters QDT-series is 190 mm and is supplied including mounting flange to fix penetration dept.

The duct air quality transmitters QDT-series have IP 65 protection on the housing/enclosure.

  • 0-10 Vdc or 4-20 mA or 0-20 mA output (selectable)
  • 0-10 Vdc: 0 Vdc = clean air, 10 Vdc = polluted air
    4-20 mA: 4 mA = clean air, 20 mA = polluted air
    0-20 mA: 0 mA = clean air, 20 mA = polluted air

  • Change-over contact for QDT S
  • Display for QDT D
  • Display show air quality in procent (0% to 100%)
    0% is clean air
    100% is polluted air


Download datasheets

Duct Air Quality (VOC) transmitters QDT-series.pdf


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