Indicator accuracy

The humidity indicators are small, simply designed, and inexpensive, so you cannot compare their measurement accuracy with that of expensive electronic instruments. At a test temperature of 20°C (+/– 2°C), the permitted tolerance is +/– 5% relative humidity.
This means the indicators are compliant with the German Federal Armed Forces technical delivery conditions (“Technische Lieferbedingungen”) TL 6685-0003, version 6 (September 2018).

The deviations are approximately 2.5% relative humidity per 5°C above and below 20°C.

Export information

When exporting goods to destinations with extreme climates, please note that the colour changes later in temperatures above 20°C, and earlier in temperatures below 20°C.

Application

The humidity indicators are either placed inside the packaging or are integrated into window panels.

When proper export packaging, including desiccants, is used at normal temperatures, the relative humidity quickly drops below 20%. The moisture indicators’ 30%  display should thus be blue.
If this is not the case after 2-3 days, check the packaging for a leak, insufficient desiccant or excessively moist packaged goods.

The indicators’ colour reaction can, however, also be delayed, e.g. by excessively low packaging temperatures in winter, a lack of air circulation between the indicator and desiccant, or unsuitable films.