Dry & Dry Humidity Indicator Cards 12 Pack | 10-60% RH 6-Spot Reusable

• 12 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 or space where you will place the humidity indicator card is sealed as much as possible to maintain a stable environment for accurate readings.
• Calibrate the Card — Carefully remove one card from its packaging. Place it inside the enclosed space and allow approximately 30 minutes for the card to calibrate to the ambient humidity level.
• Read the Humidity Level — Observe the color change on the 6 spots, which indicate humidity from 10% to 60% RH. Blue signifies dry conditions, while pink indicates higher humidity. The color change is reversible as humidity levels fluctuate.
• Monitor and Replace — Regularly check the card's color to ensure humidity remains within the desired range. If colors fade significantly with long-term use (over 20 cycles), replace the card with a new one.

Typical situations where Dry & Dry Humidity Indicator Cards 12 Pack | 10-60% RH 6-Spot Reusable helps — illustrative scenarios, not customer reviews.