National Physical Laboratory

Towards a Standard for Multi-Gas and Multi-Pressure Humidity Calibrations

Further Information

Published: 30 September 2010

Authors: Stephanie Bell, Mark Stevens, Paul Carroll, Stephen Mortimer

Related: Temperature & Humidity


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NPL calibrates humidity sensors designed to operate at high pressures and within mixtures of gases.

Humidity sensors (hygrometers) can give variable results depending on other properties of the gas they are measuring in and are often designed to work best in air, at atmospheric pressure. Developing humidity calibration standards for different conditions is important for industry, where humidity measurements are required in harsher environments.

Last Updated: 12 May 2014
Created: 10 Feb 2011

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