Dry & Dry Humidity Indicator Cards 100 Pack | 10-60% RH 6-Dot Reusable Cards for Enclosed Spaces

• 100 Premium Humidity Indicator Cards(Reusable More than 20 Times) - Cards should not be in Direct Contact with Foods or Medications
• 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)
• Strictly Tested for Clear Color Change - Indicator Changes Blue to Pink - 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.
• Our Humidity Indicator Card is the highest quality in the industry for Humidity Measurement.
• 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.(See Our Customers' Review)

• Place Card in Enclosed Space — Insert one Dry & Dry Humidity Indicator Card into a sealed container, storage bag, or enclosure alongside your moisture-sensitive items like 3D filament or electronics.
• Allow for Calibration — Wait approximately 30 minutes after sealing the enclosure. This allows the card to calibrate to the internal humidity level and for the color dots to stabilize.
• Read Humidity Level — Observe the color change on the 6 indicator spots (10% to 60% RH). Blue indicates dry conditions, while pink indicates increasing humidity. A pink 30% dot signals it's time to replace desiccant.
• Monitor and Reuse — The cards are reusable over 20 times. As humidity drops, colors may revert to blue. Replace the card if colors become faint with long-term use to ensure continued accuracy.

Typical situations where Dry & Dry Humidity Indicator Cards 100 Pack | 10-60% RH 6-Dot Reusable Cards for Enclosed Spaces helps — illustrative scenarios, not customer reviews.