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Dry & DryDry & Dry Premium Humidity Indicator Cards (12 Cards) - 10-60% 6 Spot(Reusable)

Dry & DryDry & Dry Premium Humidity Indicator Cards (12 Cards) - 10-60% 6 Spot(Reusable)

Q: What does "can be reused 20x" mean if they don't require recharging?

Yes sometimes you don't need to recharge it. Rainy days go to pink, sunny days go to blue again. If you change humidity level lower, they can go back to blue again. You can use hair dryer or sunlight to lower humidity level. Thank you.

Q: What country are these manufactured in?

They are manufactured in South Korea.

Q: Are they safe to use in food containers?

No they are not safe for food. Thank you.

Q: Hi, are these cobalt-dichloride or cobalt-chloride free? when do they expire?

Blue to pink humidity indicator cards contain cobalt chloride. There's no expiration date on humidity indicator cards. As long as you keep them in tight sealed container with silica gel packet, they will last for long time. 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. The humidity card itself is reusable. When the humidity level is high, the dots will change from blue to pink and when the humidity level is low, the dots will change from pink to blue again. With long use, the color of the dots may fade away. Then, you can replace the card. We do carry cobalt free humidity indicator cards (green to purple). You type ASIN B01DYOR0WY in Amazon search bar. Color change is not as clear as blue to pink (cobalt chloride) cards. Thank you.

Product ID: 403038994

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Details

Colour
blue
Brand
Dry & Dry
Battery description
No batteries
Mounting type
Tabletop
Operating humidity
10-60%

🎨Clear blue-to-pink color change

📏6 precise humidity spots (10%-60%)

🔄Reusable 20+ times

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Description

🌡️ Stay ahead of moisture—because your environment deserves precision!

BUILT TO LAST - Reusable over 20 times for sustainable, cost-effective use
DYNAMIC RESPONSE - Color changes adapt to fluctuating humidity, never miss a shift
SMART ENCLOSED USE - Optimized for enclosed spaces to ensure reliable humidity readings
PRECISION AT A GLANCE - 6 distinct humidity levels for accurate monitoring
INSTANT VISUAL FEEDBACK - Clear color shift from blue (dry) to pink (humid) for easy reading

Dry & Dry Premium Humidity Indicator Cards offer 6 distinct humidity level spots ranging from 10% to 60% RH, with a reusable design lasting over 20 uses. Featuring a clear blue-to-pink color change, these cards provide continuous, accurate humidity readings optimized for enclosed spaces, making them an essential tool for professionals managing sensitive environments.

Specifications

Product Dimensions	17.78 x 12.7 x 1.27 cm; 23 g
Part number	DDHUMID20PK-6 DOT
Manufacturer	Dry & Dry
Item model number	DDINCCRD10
ASIN	B07D7LSZZP

Have a Question? See What Others Asked

What does "can be reused 20x" mean if they don't require recharging?

What country are these manufactured in?

Are they safe to use in food containers?

Hi, are these cobalt-dichloride or cobalt-chloride free? when do they expire?

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