The sensor acquires the relative humidity in the duct via its capacitive humidity sensing element whose electrical capacitance changes as a function of relative humidity.
The electronic measuring circuit converts the sensor’s signal to a continuous 0...10 Vdc signal, corresponding to a relative humidity range of 0...100 %.
(QFR9530 & QAR9530)
The sensor acquires the temperature in the duct via its sensing element whose electrical resistance changes as a function of the temperature.
The signal is delivered to a suitable controller for further handling.
Sensing Element, NTC 10K
Figure 3. Characteristic.
Figure 4. Accuracy.
Resistance value in Ohm