Humidity Indicator Card
What is humidity indicator cards?
Humidity indicator cards are used in dry packing for detecting the humidity level in the dry pack environment. The indicating spots on the card are impregnated with a moisture-sensitive chemical which will change color upon absorbing moisture. By
varying the concentration of this chemical, the color change of the chemical can be controlled at different humidity levels Thus, by reading the color change on the indicating spots, the user will be able to identify the actual level of humidity in the
dry pack environment to ensure the safety of your moisture-sensitive products and to see whether the desiccant in the package works or not.


Why I need it?

High relative humidity can cause significant, possibly irreparable damage to sensitive equipment, supplies, and products. To ensure dehydration measures work, humidity indicator cards measure the relative humidity (RH) inside sealed packages to allow immediate visual inspection of whether it has sustained unsafe humidity levels.

Why I need choose your product?

Existing humidity indicator cards found in the market are impregnated with a chemical called cobalt chloride In the dry state, cobalt chloride is blue in color. After absorbing moisture cobalt chloride changes to pink color. A recent amendment made to the European CEE directive 67-548 pertaining to the Classification, Packaging and Labeling of dangerous materials, has classified cobalt chloride as a carcinogenic material. Improper handling of items containing carcinogen may cause health hazards and environment hazards, thus, goods containing cobalt chloride will not meet EU standards.
Our new range of humidity indicator cards are carcinogen-free and meet EU standards and color change can be blue to pink, yellow to azure, blown to green.

Advantage:

Reversible
Competitive price
Bright color; high recognition
Meet ROHS, EU standards, SGS
A back film to prevent chemical to reverse to your products  
Using environmentally friendly ink and moisture-sensitive chemical

Usage :
 

 The humidity indicator spots will change from blue (dry condition) to  pink (humidity condition) as the relative humidity changes in the volume of air surrounding the indicator.

 

Relative humidity is indicated at the lavender color.Indicator spots will change within eight hours of being exposed to a change in relative humidity.The humidity indicator spots are reversible, and the pink spots will change back to blue when the volume of air is dried. Humidity indicator cards with pink or lavender spots can be returned to a blue color by placing indicators in a sealed container with 33 grams (1 unit) of desiccant for four hours. However, we do not recommend reversing or using cards that have been exposed to high humidity in excess of 60 percent.The highest humidity indicator spot should be blue before being put into use.The humidity indicator will be at its most accurate at a temperature of 23 degrees Celsius 72 degrees Fahrenheit.Avoid contact with indicator spots. Wash any irritated areas with clean water.

Features: 
1. A quick, low cost method to quantify relative humidity levels inside sealed packaging.
2. Printed with moisture sensitive spots which respond to various levels of humidity with a visible color change from blue to pink.
3. Help to provide visual proof of the relative humidity level within a given environment.
4. Easy to monitor the interior humidity conditions of the package
5. Easy to see if your desiccant is working well or need to be replaced inside a sealed package or closed space.
6. Available in numerous configurations
7. Are constantly indicate relative humidity as low as 10 percent and as high as 60 percent, depending on the application and needs.
8. All the HICs meet MIL-I-8835.

Applications:
Electronics industry
semiconductor
PCB
Precision machinery industry
Optical lens, munitions
Computer, information equipment industry,
Instrument industry, organic materials,
In composite materials, metal materials, etc.

Storage

Store humidity indicators in original sealed container with desiccant when possible. Before using, verify that indicator spots have not changed color. Replace bad desiccant after three openings of container. Store in dry, cool area. Keep indicators out of direct sunlight. Keep humidity indicators away from water or steam.