Relative humidity sensor (electrical impedance)

• Hygrometer based on an electronic component that absorbs water vapour according to air humidity, and changes electrical impedance (resistance or capacitance).
• Instrument is usually in the form of a 'probe' that houses the sensor, attached directly, or by a cable, to an electronics unit to display the relative humidity reading.

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• Humidity measurement
• Humidity basics
• Hygrometers
• Measuring humidity