Moisture in the interiors of buildings often leads to extensive problems: construction defects and incorrect user behaviour can result in mould formation. Testo's patent-pending “humidity image” displays the relative surface humidity for each individual measuring value in the image. This means you can measure any increased humidity and detect the first signs of mould damage, before this is actually visible to the naked eye. The thermal imager's temperature measurement here serves as a basis for calculating the relative surface humidity.
The humidity pallet on Testo thermal imagers then uses the traffic light principle to represent the different risk zones:
Green = no risk
Amber = caution, mold formation possible
Red = WARNING! Risk of mold