Relative Humidity

(QFR9530)

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 %.

Temperature

(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.

Legend

R
ϑ
∆ϑ

Resistance value in Ohm
Temperature in degrees Celsius
Temperature differential in Kelvin

See document A6V11937911 for more information about QFR/QAR9530.