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

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.

4.0/5

ID del producto: 743194054

Transacción segura

Detalles

Color
blue
Brand
Dry & Dry
Battery Description
No batteries
Mounting Type
Tabletop
Operating Humidity
10-60%

📏Compact 17.78x12.7 cm size

🔵6-spot humidity range 10-60% RH

♻️Reusable 20+ times

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Descripción

♻️ Stay ahead of moisture—track humidity like a pro!

INSTANT VISUAL ALERTS - Quickly identify humidity changes with vivid, easy-to-read color transitions.
ECO FRIENDLY REUSABILITY - Use each card over 20 times—sustainable monitoring without constant replacements.
INDUSTRY LEADING ACCURACY - Strictly tested for reliable, consistent readings in controlled indoor settings.
COMPACT LIGHTWEIGHT DESIGN - Fits seamlessly into sealed environments without adding bulk or weight.
PRECISION 6 SPOT HUMIDITY TRACKING - Monitor exact moisture levels from 10% to 60% RH with clear blue-to-pink color shifts.

Premium Humidity Indicator Cards provide precise, reusable humidity monitoring across six key levels (10%-60% RH) with clear color changes from blue to pink. Designed for indoor sealed environments, these compact cards deliver reliable, eco-friendly moisture tracking without batteries or complex tools.

Presupuesto

Color	blue
Size	12 Pack
Manufacturer	Dry & Dry
Product Dimensions	17.78 x 12.7 x 1.27 cm; 23 g
Package Weight	0.02 Kilograms
Batteries Required	No
Batteries Included	No

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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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