Our duct humidity and temperature sensors are designed to measure relative humidity, absolute humidity, enthalpy and dew point and temperature in air ducts.


The sensor outputs are active 0...10V or 4...20mA and are selectable via DIP switch.

Passive temperature outputs such as PT100, PT1000, NTC10k, NTC10k-Pre, NTC20k and Ni1000 are also available.

Please refer to the various models below for detailed specifications.



Duct Humidity &

Temperature Sensors

Duct Humidity & Temperature Sensors - CDI 4
Duct Humidity Sensors
Duct Humidity &  Temperature Sensor
Power Supply AC/DC 24V
Output: 0...10V or 4...20mA
Optional Temperature passive outputs
Measuring Variable:
rel. humidity,
absolute humidity,
dew point,
Temperature Ranges:
Selectable via DIP switch
Pipe Condensation  Sensor - HPS 2
Leakage Switch
Pipe Condensation Sensor
to prevent dew formation on pipes or flat surfaces
Power Supply AC/DC 24V
Output: on/off
 Humidity Surface Leakage Switches - HPS 2
Humidity Surface Leakage switch
Surface leakage sensor
to detect water leakages on surfaces
Power Supply AC/DC 24V
Output: on/off