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- 50 high-quality humidity indicator cards (reusable over 20 times). The cards must not be in direct contact with food or medicine. Our humidity indicator card is of the highest quality in the industry for measuring humidity. Strictly tested for a clear color change. Indicator changes from blue (dry) to pink (humid).
- The humidity indicator cards are sensitive to temperature, humidity, atmospheric pressure, and wind. Therefore, they do not work well outdoors. They work well and show an accurate relative humidity level in enclosed spaces. When the card is opened, all spots sometimes react and change color because they are exposed to sudden humidity.
- If you wait about 30 minutes, the card will calibrate, and you will be able to read the humidity level.
- 6 dots indicating humidity (10%/20%/30%/40%/50%/60% RH clear color change). Continuously and accurately displays humidity level. If the humidity level becomes lower, the strip will turn back to blue (original color). Just because the color has changed to the next level does not mean it cannot return to the previous color. Colors will change depending on humidity level.
- Colors may fade with long-term use of over 20 times.
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