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    taylorlewis's Avatar
    taylorlewis Posts: 1, Reputation: 1
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    #1

    Jun 14, 2009, 09:38 AM
    Cocl2 in Hygrometers
    Why is CoCl2 used in hygrometers?
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #2

    Jun 14, 2009, 10:04 AM

    changes color from blue (dry) to pink (wet) when it gets moist. It can, therefore, be used as a sensor by passing light through it and detecting absorbance.
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