Different types of relative humidity access hygrometers
The measurement of relative humidity in a climatic environment - The main types of hygrometer for measuring or determining relative humidity and associated uncertainty
Article REF: R3049 V1
Different types of relative humidity access hygrometers
The measurement of relative humidity in a climatic environment - The main types of hygrometer for measuring or determining relative humidity and associated uncertainty

Author : Bernard CRETINON

Publication date: September 10, 2025 | Lire en français

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5. Different types of relative humidity access hygrometers

5.1 Condensation hygrometer

This hygrometer is used as a metrological reference or for measurements in heterogeneous climatic environments (e.g. characterization of climatic chambers, secondary and transfer standards, etc.).

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5.1.1 Measuring principle

The measuring principle of a condensation hygrometer is based on the gradual cooling of a body until a dew (or frost) deposit forms on its surface.

Cooling is then stabilized to maintain a state of equilibrium between the...

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