Dry & Dry Humidity Indicator Cards 50 Pack (Reusable) | 10-60% RH, 6 Spots

• 50 Premium Humidity Indicator Cards(Reusable 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 Blue(Dry) to Pink(Humid). 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 Indicating(10%/20%/30%/40%/50%/60% 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 times.

• Prepare the Enclosed Space — Ensure the space where you will place the humidity indicator card is properly sealed. This could be a storage container, safe, electronic device packaging, or a gun case. A good seal is crucial for accurate readings.
• Place and Calibrate the Card — Insert the Dry & Dry Humidity Indicator Card into the prepared enclosed space. Allow approximately 30 minutes for the card to calibrate to the ambient humidity level within the sealed environment.
• Read the Humidity Level — Observe the color change on the 6 spots. Blue indicates dry conditions (low humidity), while pink indicates humid conditions (high humidity). The card will show the current RH level between 10% and 60%.
• Monitor and Reuse — The colors are reversible, meaning the card will change back to blue as humidity decreases. You can reuse each card over 20 times for ongoing monitoring. Store unused cards in their original sealed packaging to maintain their effectiveness.

Typical situations where Dry & Dry Humidity Indicator Cards 50 Pack (Reusable) | 10-60% RH helps — illustrative scenarios, not customer reviews.