Halogen Free Humidity Indicator Card

3 Dot Humidity card, blue gradient turn to pink indicator card

Humidity card is reversible and changes color. If the humidity exceeds the corresponding humidity value, the color changes from blue to pink. If the humidity is lower than the corresponding humidity value, the indicator circle that has already turned pink can be inverted back to the blue indicator circle. However, it takes longer to change from pink to blue, and sufficient desiccant is needed to restore the humidity card to its blue state.

Humidity indicator card is a convenient and inexpensive method for detecting environmental humidity. Users can quickly determine the humidity inside the product packaging and the effectiveness of the desiccant based on the color on the card. If the humidity in the packaging exceeds or equals this humidity value, it is easy to determine the effectiveness of the desiccant or replace the desiccant inside the packaging.

The six point blue humidity card is a non-toxic, harmless, and compliant

humidity indicator card with environmental regulations of various countries. At

different levels of humidity, humidity sensitive points will change color

Accordingly

From Blue(Dry)    to Pink (Wet)  

Test method：Compare color in constant temperature and humidity				Test Standard
Model	Test temperature and humidity	Test time			Test result
		0H	0.5H	1H	Qualified	Unqualified
Sample 1	Humidity 5%				●
	Temperature 28°
Sample 2	Humidity 10%				●
	Temperature 28°
Sample 3	Humidity 60%				●
	Temperature 28°

Test conclusion: After experimental colorimetric testing, the card humidity value is consistent with the environmental humidity color change, and it is qualified

Note: As the humidity in the surrounding environment increases, the indicator point of the humidity card changes from blue (dry) to pink (wet). The humidity card is a reversible card, meaning that the pink indicator point will change back to blue as the surrounding humidity decreases.

Place the humidity indicator card in the packaging or environment of the product that needs to monitor humidity, similar to a thermometer. When the humidity in the packaging exceeds a certain humidity value, the corresponding humidity indicator point will change from blue to pink. For example, when the humidity exceeds 10% but is less than 60%, the 5% and 10% indicator points on the humidity indicator card will gradually change from blue to pink, and 60% of the indicator points will still be dry blue. At this point, it can be determined that the humidity value is between 10% and 60%. When the humidity of the environment decreases, the color of the points on the indicator card will change back from the hygroscopic color to the dry color, but it requires a certain temperature or more desiccant and a longer time.

Usage: Humidity monitoring in product packaging that requires moisture protection.

 

How to use?

Place products to be stored in airtight containers

Place the desiccant and temperature indicator card into the packaging container

Airtight container

When the color of the dot on the temperature indicator card changes, please replace the desiccant in time.

• Electronic Components: Storage and transportation of humidity-sensitive electronic components such as integrated circuits, semiconductors, and LEDs.
• Precision Instruments: Storage and transportation of precision instruments with high humidity requirements, including optical instruments, medical devices, and precision machinery.
• Pharmaceuticals and Food: Storage and transportation of humidity-sensitive products such as medicines, food, and health supplements.
• Other Fields: Storage and transportation of products with humidity requirements in industries like chemicals, military, aerospace, and more.

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