Hygrometers

A hygrometer is an instrument used to measure relative humidity. Relative humidity is a measure of how much water the air is holding, relative to the maximum amount of water the air could possibly hold at a given temperature.Because of the delicate design of hygrometers, it is easy for them to become innacurate (e.g. with shipping or just over time). A simple method of calibrating your hygrometer will help ensure you are measuring the relative humidity as accurately as possible. Hygrometers should be calibrated yearly. Hygrometers are available in both digital and dial models, and both should be checked for calibration. Some dial types will have...

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