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Dry & Dry 15 Packs Premium Cobalt Free Humidity Indicator Cards(Reusable 6 Spots)
Card Dimension 1.5 x 4.5 Humidity indicator cards are sensitive to temperature, humidity, atmospheric pressure, and wind. Therefore, they do not work well in open air. They work well and display accurate relative humidity level in enclosed space. Cobalt Chloride Free Premium Quality - REUSABLE Eco Friendly Humidity Indicator Card When You Initially Open the Card, All Dots Sometimes React and Change Color Because They are Exposed to Sudden Humidity. If You Wait for About 30 minutes, the Card will Calibrate and You will be able to Read the Humidity Level. - 6 Spots Humidity RH - Clear Color Change) Indicator Changes Green to Purple(Violet) - Green(Dry) to Purple(

Price is $6.00

Price: $5.99