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.

What country are these manufactured in?

They are manufactured in South Korea.

Are they safe to use in food containers?

No they are not safe for food. Thank you.

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.

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プレミアム湿度インジケーターカード(カード12枚) - 10~60% 6スポット(再利用可能)。

プレミアム湿度インジケーターカード(カード12枚) - 10~60% 6スポット(再利用可能)。

Product ID: 743194054

Details

ブランド
Dry & Dry
取り付けタイプ
卓上式
商品の重量
0.02 キログラム
色
ブルー
電池の説明
電池不要。

📊6 precise humidity spots (10-60%)

♻️Reusable 20+ times

🔵🔴Clear blue-to-pink color change

R764

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

♻️ Stay ahead of moisture with precision and style!

INSTANT VISUAL ALERTS - Vivid color shifts from blue (dry) to pink (humid) make monitoring intuitive and stress-free.
SEALED SPACE SPECIALIST - Optimized for enclosed environments to ensure exact humidity tracking—perfect for sensitive goods.
PREMIUM INDUSTRY STANDARD - Rigorously tested for crystal-clear color changes, trusted by professionals for reliable results.
PINPOINT HUMIDITY ACCURACY - 6 distinct spots deliver precise 10-60% RH readings for confident environment control.
SUSTAINABLE COST EFFECTIVE - Reusable over 20 times, reducing waste and saving your budget without sacrificing quality.

The Dry & Dry Premium Humidity Indicator Cards offer 12 reusable cards with 6 color-changing spots that accurately measure relative humidity from 10% to 60%. Designed for sealed environments, these cards provide clear visual cues—blue for dry and pink for humid—helping professionals monitor moisture levels effortlessly. Tested for industry-leading clarity and durability, each card can be reused over 20 times, making it a sustainable and reliable tool for managing sensitive products like food and pharmaceuticals.

Specifications

ASIN	B07D7LSZZP
UPC	712396969211
おすすめ度	4.0 5つ星のうち4.0 (128) var
カラー	ブルー
バッテリータイプ	電池不要。
ブランド名	Dry & Dry
メーカー名	Dry & Dry
メーカー型番	DDHUMID20PK-6 DOT
モデル番号	DDINCCRD10
上位温度定格	30 摂氏
動作湿度	10~60%
取り付けタイプ	卓上式
商品の重量	0.02 キログラム

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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R764

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

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