Duct sensors (air)
Sensors for mounting in ducts and air handling units. They measure temperature, humidity, air quality (CO₂, VOC) and differential pressure, for example across filters and fans.
Types of duct sensors
01DT and 01CT
Passive temperature sensors (Pt1000, Ni1000, NTC) with various probe lengths, 01CT with cable.
22DT
Active temperature sensors with 0…10 V / 4…20 mA output.
22DTH
Active humidity and temperature sensors, versions with Modbus and BACnet.
22DC, 22DTC and 22DTM
CO₂, CO₂ + temperature, CO₂ + humidity + temperature and VOC sensors.
22ADP
Air differential pressure sensors from ±150 Pa to 7000 Pa, also with flow calculation.
Key parameters
Passive or active
A passive sensor must match the controller input (Pt1000, Ni1000, NTC).
Length
Choose to suit the duct size. Mounting flanges are in the accessories.
Selectable
On active sensors, the range is often set with a switch or via NFC.
Pressure range
A few hundred Pa is enough for filters; choose a higher range for fans and flow.
