Environmental Cobalt Free Brown to Green Humidity Indicator Card
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Environmental Cobalt Free Brown to Green Humidity Indicator Card

  • The Humidity Indicator Card (HIC) is a cost-effective and reliable tool for monitoring environmental humidity levels. By observing the color change on the card, we can easily determine the humidity inside the packaging. When the humidity reaches or exceeds a specific value, the dot on the card changes color from DRY to WET, providing a clear indication of the effectiveness of the desiccant.
  • The HIC is made of 0.4mm thick blotting paper, ensuring its durability and functionality. It can be customized to display humidity levels of 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, and 90%. Additionally, the HIC meets the standards set by JEDEC J-STD-033 and GJB2494-95, ensuring its reliability and compatibility.
Product Description

  Humidity Indicator Cards (HICs) are compact paper devices created to monitor the levels of relative humidity. With various options available, these cards can detect relative humidity ranging from as low as 5 percent to as high as 95 percent, catering to different applications and requirements.

  There are two primary types of HICs: reversible and irreversible. Reversible HICs function similarly to a thermometer, displaying fluctuations to indicate the present relative humidity level. On the other hand, irreversible HICs are specifically designed to record the maximum relative humidity level that goods have been exposed to, serving as a permanent indicator.



    Moisture can have a detrimental impact on high-end electronic and instrument equipment, such as electronic components and precision optical components. It can lead to product corrosion, reduced sensitivity, and even irreversible damage. To safeguard against moisture-related issues, manufacturers often employ moisture-proof packaging methods during the final and semi-finished product stages.

    One effective tool for monitoring and maintaining optimal humidity levels is the humidity display card. This card serves as a convenient and cost-effective solution for detecting whether the humidity inside the sealed packaging remains within the desired range. By simply opening the sealing bag and observing the color display on the humidity card, one can assess whether the humidity falls within the specified limits. Furthermore, it indirectly indicates the effectiveness of the desiccant inside the sealed packaging in absorbing moisture.

Humidity Indicator Cards

Industries use

Civilian use


  • Convenient to utilize;

  • Simple to monitor;

  • Compliant with lead-free RoHS standards;

  • Highly sensitive; Cost-effective;

  • Provides rapid humidity determination (when the indicator point transitions to a purple hue, between blue and pink, the corresponding number indicates the current humidity level);

  • effectively prevents moisture damage.


  • We offer tailored specifications to meet your specific requirements.

  • Our dedicated team of professional Quality Control experts ensures the superior quality of your product.

  • We follow a professional Standard Operating Procedure (SOP) throughout the entire production process, from sourcing raw materials to the final product.

  • We maintain strict inspection protocols during every stage of production.

  • Before shipment, we conduct a thorough 100% inspection to ensure the highest quality standards are met.


Passed the ISO9001:2015 quality system authentication and ROHS authentication.



  • With 22 years of experience in the desiccant industry, we are a high-tech enterprise that combines scientific research, production, marketing, technical services, packaging consulting, quality testing, and moisture-proofing solutions.

  • Our independent R&D has led to the development of a revolutionary wrapping paper for desiccants called Detuch paper. This eco-friendly, water-proof, dust-proof, smooth, and lint-free paper ensures optimal performance.

  • In our workshop, we have over 200 state-of-the-art machines dedicated to producing desiccants. With sales and branch services in Foshan, Shanghai, Shenzhen, Hong Kong, and Germany, we are well-equipped to meet your specific requirements.

  • Our commitment to technical research and development is evident through our active participation in formulating and revising industry and national standards for desiccants and oxygen absorbers. We organize colloquiums with leading enterprises in various industries to provide professional solutions tailored to your needs.



  • Raw Material Inspection: We thoroughly inspect all incoming raw materials to ensure their quality and suitability for use in our products.

  • In Processing Inspection: Our dedicated team conducts inspections during the manufacturing process to monitor and control the quality of the products at various stages. This helps us identify and address any potential issues early on, ensuring the final product meets our strict quality standards.

  • Final Inspection: Before the products are ready for shipment, a final inspection is conducted to verify that they meet all required specifications and quality standards. This includes a meticulous examination of the appearance, functionality, and performance of each item.

  • Outgoing Inspection: Prior to delivery, all products undergo a final outgoing inspection. This is done to confirm that the products are in perfect condition, properly

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  • Q What's the lead time?

    A 5-7 days after payment checked, big qty will be negotiated.
  • Q Do you offer free sample?

    A Yes, free sample available, freight collected.
  • Q What is your MOQ?

    A  1 carton
About Us
Topcod Industry hopes to cooperate with customers all over the world for mutual developments and benefits for win-win business.

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 Email: tp@topcod.com.cn
 Tel: +86-757-2339-5985
Address: No.10,1st Road, Jibei Industrial Zone, Longjiang, Shunde, Foshan, China
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