The Thermodetektor Bosch PTD 1 detects thermal bridges and areas at risk of mold. At the push of a button, they analyze poorly insulated windows or find uninsulated areas on exterior walls. Depending on the mode, the PTD measures 1 room temperature, surface temperature of walls and objects, and humidity and interprets the data. This is done using three sensors and Bosch's own software. The three-colour LED provides clear recommendations for action according to the traffic light principle.