Humidity Sensor: Description and Operation

IN-VEHICLE TEMPERATURE/HUMIDITY SENSOR

The in-vehicle temperature/humidity sensor operates in the following manner:
- A thermistor in the in-vehicle temperature/humidity sensor measures air temperature inside the passenger compartment
- A humidity transducer in the in-vehicle temperature/humidity sensor measures in-vehicle humidity.
- A hose and elbow is connected between the plenum chamber and the in-car temperature/humidity sensor.
- Airflow through the plenum chamber creates a venturi-type suction through the hose which draws passenger compartment air through the in-vehicle temperature/humidity sensor and across the thermistor and humidity transducer.