Duct and externally mounted relative humidity and temperature sensors for HVAC applications. The certified 2% high accuracy (duct only) and standard 3% versions offer excellent linearity and stability over a wide humidity range (10 to 90 %RH).
The Externally mounted sensor is fitted with a radiation shield to avoid solar, rain and wind effects.
R.H. range 0 ... 100 %rh
R.H. sensing element capacitive
Protection class IP65
Output Signal 2x 4..20mA: Temp/RH
Power supply 24 Vdc | 2 VA 
Additional description Precalibrated for ease of commissioning
2 part connectors for ease of installation
Humidity sensor element protected by replaceable filter
Capacitive humidity sensing element provides excellent long term stability
Adjustable depth duct mounting flange option (duct version)
Radiation shield reduces solar, rain, and wind effects (outside version)
R.H. calibrationTemperature elementMounting placeTemperature rangeTypeDownloads
%rh  oC TXTPDF
2air duct0 ... 40HT/D/2% TXT
PDF
Specification sheet (English) Installation/mounting instruction (English)
3NTC10kwall outside-40 ... 50HT/O TXT
PDF
Specification sheet (English) Installation/mounting instruction (English)