HYGRASGARD® FSFTM-Modbus

The room humidity sensor and transducer HYGRASGARD® FSFTM - Modbus in a flush-mounted housing, optionally with potentiometer, is used to measure the relative humidity and temperature of the air and to set setpoint values. The following parameters are calculated internally from the measured variables: relative humidity [% r.H.], absolute humidity [g/m³], mixing ratio [g/kg], dew point temperature [°C], enthalpy [kJ/kg] (disregarding atmospheric air pressure) and room temperature [°C]. The parameters are queried via the Modbus interface.


A digital, long-term stable sensor is used for humidity and temperature measurement. The relative humidity [% r.H.] is the quotient of the water vapor partial pressure and the saturation vapor pressure at the respective gas temperature. The flush-mounted sensor is installed in high-quality surface switch programs, preferably from Gira, Berker, Merten, Jung, Siemens or Busch-Jaeger (using a flush-mounted adapter, no setpoint adjustment possible), either individually or in combination with light switches, sockets, etc. It is used in non-aggressive applications. It is used in non-aggressive, dust-free environments, in refrigeration, air conditioning and clean room technology, in interiors such as living rooms, offices, hotels, etc.