A gravimetric hygrometer is a device that calculates the moisture content in the air or a gas by directly measuring the change in mass of a moisture-absorbing substance over time. This technique is employed to quantify moisture content with high accuracy and serves as a reliable reference method.
Gravimetric hygrometers operate on the principle of mass change. A known mass of a moisture-absorbing substance is placed in a controlled environment. As the substance absorbs moisture from the surrounding air, its mass increases. The change in mass is then measured over a specific period, typically several hours to days. By knowing the mass change, the amount of moisture absorbed can be calculated.
Gravimetric hygrometers are widely used in various industries and applications, such as:
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