Humidity indicator card

The humidity indicator card (humidity card) is used to indicate the relative humidity in the product packaging container. The relative humidity RH refers to the humidity saturation percentage of air in a certain volume. The determinants for no mildews during storage and transportation is that the relative humidity RH <50%. The relative humidity RH can be controlled by desiccants, which will lose its effect when the desiccant absorbs water to a certain extent. The humidity indicator card can easily detect the relative humidity in the sealed package. When the indicator point turns purple (before blue and pink), the value in the indicator point refers to the current ambient humidity. It is a convenient and cheap method to detect the humidity in the environment. If the humidity in the package has reached or once reached this value before, the dot on the card will change from blue to pink. Our humidity indicator cards can prevent your products, especially some precision products, from the risk of getting wet.