Place these Standard Humidity Indicator Cards (5-Pack) in display or storage areas to monitor relative humidity (RH) levels. The colored squares respond to moisture in the air by changing color, with the break between pink and blue squares showing the current RH.
- Each colored square in the scale indicates a 10% humidity range, from dry to damp
- To use, simply place it in the area to be monitored
- Do not place near air vents or windows as this may skew readings
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