Measurement instrument for relative humidity and temperature in rooms and ducts in HVAC plants. The combination of state-of-the-art sensor technology and functionality makes this device to a versatile solution for various applications.

HygroMaxx S / R / M

High performance measuring instrument with large LCDisplay for air relative humidity and temperature. For installations  in rooms or ducts. The digital capacitive humidity measurement cell in conjunction with a newly developed sensor technology, enable this device to be used in various applications for measuring climatic parameters. This device can be calibrated at 3 humidity and 1 temperature point. The humidity calibration can be performed with the reusable SAL-SC standards.


The following 3 instrument versions are available:

S - room sensor version (probe fixed at the housing lid)

R - duct sensor version (probe on the back of the housing)

M - remote sensor version (probe with 3m cable length)


Range of use

The HygroMaxx product series have been developed following the newest technology in monitoring and controlling in the HVAC sector.or Monitoring and controlling in rooms and ducts.



  • HVAC plants (Heating/Ventilation/Air-Conditioning)
  • Production processes in paper- & textile industry
  • Clean Rooms
  • Archives, libraries, museums, storages
  • Appartuses, climatic chambers, controls
  • OEM solutions

Technical Data


Humidity measurement

CMOS-Sens, digital capacitive

Measurement range:: 0...100%%rH
Reproducibility: +/-1.0%rH
Accuracy: +/-3.0%rH standard / +/-1.5%rF calibrated

Temperature measurement

digital PN barrier silicon layer

Measurement range: -20...80°C
Reproducibility: +/-0.1K

+/-0.5K (10...30°C) / +/-0.8K (-20...80°C)