Dry Dry Humidity Indicator Cards 50 PackReusable 1060 6 Spot50 Cards

50 Premium Humidity Indicator CardsReusable More than 20 times Cards should not be in Direct Contact with Foods or Medications Our Humidity Indicator Card is the Highest Quality in the Industry for Humidity Measurement Strictly Tested for Clear Color Change Indicator Changes BlueDry to PinkHumid 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 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 Indicating102030405060 RH Clear Color Change CONTINUOUSLY ACCURATELY Displays Humidity Level If the humidity level becomes lower the strip will change back to blue the original color Just because the color has changed to the next level does not mean it cannot go back to the previous color The colors will change depending on the humidity level Colors may fade with long term use of more than 20 timesSee Our Customers Review