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PHY-MESS-64 HARR OR HAIR HYGROMETER

SKU:SSI-PHY-MESS-64

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A hygrometer that measures relative humidity by means of the variation in length of a strand of human hair. The length variation of a properly treated hair is 2%–2.5% when the humidity changes from 0%–100%. Circular dial type hygrometer with scale 0 to 100×1% RH (Relative Humidity). In metal case

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