Dry & Dry Humidity Indicator Cards 20 Pack (Reusable) - 10-60% RH, 6 Spots | Industrial Grade Moisture Monitoring

• 20 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 container, safe, or enclosure is clean and sealed. Avoid placing cards in direct contact with food or medications.
• Calibrate the Card — Place one or more humidity indicator cards inside the sealed space. Allow approximately 30 minutes for the card to calibrate to the internal environment's humidity.
• Read the Humidity Level — Observe the color change on the 6 indicator spots. Blue indicates dry conditions, while pink indicates humid conditions. Match the spot color to the corresponding percentage (10-60% RH) for an accurate reading.
• Monitor and Re-seal — Check the card periodically. If humidity levels rise, consider adding a desiccant. The card will revert to blue as humidity decreases, showing its continuous monitoring capability.

Typical situations where Dry & Dry Humidity Indicator Cards 20 Pack (Reusable) - 10-60% RH helps — illustrative scenarios, not customer reviews.