QFM31... is a duct sensor for measuring relative humidity (high precision) and temperature. It uses a capacitive humidity measurement principle, has an operating voltage of AC 24 V or DC 13.5.35 V, and a signal output of DC 0.10 V/4...20 mA, for relative humidity and temperature. It is suitable for HVAC applications with high requirements for relative humidity measurement accuracy and response time, and the measurement range covers the entire humidity range of 0...100%.
