Humidity Indicator Card
SKU: 490001300
Humidity indicator card. Reversible, 3-spot relative humidity indicator (20%, 30%, 40%). Cards change from blue color (dry) to lavender to pink (humid) as relative humidity increases.
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SKU: 490001300
Humidity indicator card. Reversible, 3-spot relative humidity indicator (20%, 30%, 40%). Cards change from blue color (dry) to lavender to pink (humid) as relative humidity increases.