What is a humidity indicator card?

The humidity indicator card is a small paper tool designed to control the relative humidity level. With different constructions, the Humittector indicator card can display humidity levels ranging from a minimum of 5% to a maximum of 95% depending on the application and requirements.

There are usually two main types of humidity indicator cards: reversible humidity indicator cards and irreversible humidity indicator cards. The reversible humidity indicator card works like a thermometer and can make corresponding changes based on the relative humidity at that time; The maximum humidity indicator card, or irreversible humidity indicator card, is mainly used to test the maximum relative humidity that goods can be exposed to.

How to use the Humittector humidity indicator card?

Excessive relative humidity can cause irreparable damage to sensitive equipment, storage, goods, etc. Therefore, many companies strictly package the goods that need to be transported and stored in the supply chain to prevent them from being affected by humidity during this process. At the same time, to prevent goods from getting damp, many carriers and manufacturers also take corresponding measures, such as using packaging with desiccants. But it is difficult to estimate how effective these measures can be. Some products, such as electronic products, usually do not show significant changes after being damp, and the desiccant has lost its effectiveness before the user is aware of the need for replacement.

The humidity indicator card can display visible changes in relative humidity in specific packaging environments. If the indicator card shows relatively high humidity, users know they need to replace the desiccant and check if their goods are damaged.

Humidity indicator card (humidity card) is used to indicate the relative humidity inside the product packaging, and relative humidity RH refers to the percentage of humidity saturation in a certain volume of air. During storage and transportation, the goods do not produce any products or mold, but whendesiccantOnce the water absorption reaches a certain level, it will lose its effectiveness. The humidity indicator card can conveniently detect the relative humidity inside the sealed packaging. It is a convenient and inexpensive method for detecting whether humidity in the environment is safe. If the humidity in the packaging reaches this level, the dots on the card will change from blue to pink.

Sud Chemie strictly produces humidity indicator cards according to various industrial and environmental indicators, ensuring no color accuracy or quality issues.

（Compliant with IPC\/JEDEC J-STD-033B requirements)

Application scope:

Mainly used in aviation components, electronic products, optical electronics, precision instruments, and other industries