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Cobalt Dichloride Free Humidity Indicator Card

Your Professional Cobalt Dichloride Free Humidity Indicator Card Supplier

 

Dongguan Weiyi Electronic Technology Co., Ltd.is a specialized enterprise engaged in the production and sales of humidity indicator cards, desiccants, and moisture-proof & anti-static packaging solutions. Our products are widely used in electronic components, PCBs, automotive, food, pharmaceuticals, optical & optoelectronic products, aerospace, chemical industries, and more.

 

 
 
Why Choose Us

 

Our Certificate

We ISO9001 and SGS certified products compliant with RoHS and REACH international environmental standards.

Custom Solutions Available

Providing over 200 humidity indicator card designs with professional customization services based on customer requirements.

Extensive Industry Experience

Over 18 years of expertise in humidity indicator cards and desiccant manufacturing, specializing in moisture-proof and anti-static packaging solutions.

Strong Manufacturing Capacity

10000㎡ modern production facility with a daily output of 1 million humidity indicator cards for stable and fast delivery.

 

6-Spotcobalt Dichloride Free Humidity Indicator Card

 

Product Description
  • Humidity indicator card is a kind of accurate and convenient humidity testing means, through the color change of the indicting dots on the card.

 

  • Easy to clearly observe the relative humidity inside the current packaging.

 

  • Cobalt Dichloride free series, Cobalt free series, Cobalt and Halogen free series humidity indicator, which can meet the needs of humidity indication on different occasions and under different environment.

 

  • Widely indicating range can be customized from 10-90%.

 

  • Color change: Blue-Pink(common HIC), or brown to green(Cobalt-free HIC) .

 

  • Packaging: 20pcs/vacuum packing, 250pcs/can, 5,000pcs/carton.

 

Specification

 

Item

Specification

Product Name

6-Dot Cobalt Humidity Indicator Card (Blue to Pink)

Humidity Range

10%RH, 20%RH, 30%RH, 40%RH, 50%RH, 60%RH

Physical Form

Card Type

Color Change

Blue (Dry) → Pink / Lavender (Humid)

Single Card Size

38mm × 104mm

Standard Compliance

JEDEC J-STD-033B, RoHS, SGS Tested

Package

250 cards per can

Main Application

PCB, IC, electronic components, moisture-sensitive devices, semiconductor, military equipment, hardware, anti-moisture products

 

 
Advantages of Cobalt Dichloride Free Humidity Indicator Card
 
01/

Strict Environmental Compliance: Unlike traditional cards that contain Cobalt Dichloride (a classified hazardous substance), cobalt-free cards meet strict EU REACH and RoHS directives. They pose no environmental or safety risks upon disposal.

02/

Industry Standard Performance: These cards are fully compliant with IPC/JEDEC J-STD-033 standards, ensuring reliable and accurate color shifts when relative humidity thresholds are exceeded.

03/

Safe for Sensitive Electronics: Ideal for micro-contamination-sensitive environments like semiconductors, aerospace components, and optoelectronics, they eliminate the risk of chemical outgassing that could potentially damage delicate circuitry.

04/

Real-Time Visual Monitoring: Like standard HICs, they offer an immediate, reversible color change (usually from blue/brown to pink/lavender) as humidity fluctuates. This tells operators exactly when desiccant packs need to be replaced.

 

 

Usage Requirements of Cobalt Dichloride Free Humidity Indicator Card

Humidity indicator spots change from blue (dry) to pink (humid) as relative humidity changes.
Current relative humidity is indicated by a lavender color.
Indicator spots will change within eight hours of being exposed to a change in relative humidity.
Humidity indicator spots are reversible. Pink spots will change back to blue when the volume of air is dried. Pink or lavender spots can be returned to blue by placing them in a sealed container with one unit (33 grams) of desiccant for 48 hours.
The highest humidity indicator spot should be blue before the card is put to use.
The humidity indicator card will be at its most accurate when used at a temperature of 73°F (23°C).
Avoid contact with indicator spots. Wash any irritated areas with clean water.

6-Spotcobalt Dichloride Free Humidity Indicator Card

 

Application of Cobalt Dichloride Free Humidity Indicator Card
1

Electronics & Semiconductors

Used to monitor moisture barrier bags (MBB) housing sensitive circuit boards and microchips.

2

Aerospace & Defense

Protects radar components, optics, and highly sensitive defense systems from condensation and rust.

3

Pharmaceuticals & Food

Because they do not contain toxic cobalt compounds, they are entirely safe for monitoring perishable goods, medications, and medical devices.

4

Industrial & Machinery

Prevents irreparable corrosion and moisture degradation of precision tools and metal supplies.

 

FAQ

 

Q: Can cobalt chloride be used as an indicator?

A: Cobalt chloride is a common visual moisture indicator due to its distinct colour change when hydrated. The colour change is from some shade of blue when dry, to a pink when hydrated, although the shade of colour depends on the substrate and concentration.

Q: How to use humidity indicator cards?

A: Select the indicating spot that most closely matches the color of the comparison bar. The measured relative humidity is the percentage indicated on the matching spot. The chemical reaction of the indicating spots is completely reversible; the spots will continue to change color as the moisture levels change.

Q: What is cobalt chloride used for?

A: Cobalt dichloride is a cobalt salt in which the cobalt metal is in the +2 oxidation state and the counter-anion is chloride. It is used as an indicator for water in desiccants. It has a role as a sensitiser, a calcium channel blocker, a two-colour indicator and an allergen.

Q: How long do humidity indicator cards last?

A: The shelf life for humidity indicator cards varies depending on the card. However, most humidity indicator cards have a 3-year shelf life.

Q: Are humidity indicator cards reusable?

A: The humidity card itself is reusable. When the humidity level is low, the dots will change from pink to blue again. With long use, the color of the dots may faint. Then, you can replace the card.

As one of the most experienced cobalt dichloride free humidity indicator card manufacturers and suppliers in China, we have world-leading production equipment and strong manufacturing capabilities. Please feel free to wholesale high quality cobalt dichloride free humidity indicator card made in China here from our factory. Customized orders are welcome.

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