The test is used for the quick and easy determination of the relative atmospheric humidity. The paper is simply exposed to the atmosphere in question. When the colour of the pad does not change anymore, the humidity can be read off.
- Always ready to use: No accessories necessary for evaluation
- Colour change from pink to blue for moisture indicators and yellow to red for moisture indicator without cobalt chloride
Moisture sensitive goods including electronics and optical systems have to be stored at low atmospheric humidity. They are usually packed in sealed plastic bags together with a desiccant. Moisture indicators are used to control if the desiccants is active and if moisture is effectively kept away from the goods.
Moisture indicator without cobalt chloride is free from carcinogenic and toxic material. The clear colour change from red to yellow ensures precise readings. Established humidity indicators are based on cobalt chloride (CoCl₂), which has been found to be carcinogenic and toxic.