Based on this measured value, a variety of temperature controls can be implemented using 3 different functions (thermometer, cooling and heating). Various consumers (e.g. fan heaters, air conditioners, alarm systems, etc.) can be directly controlled automatically and manually via two integrated, potential-free relays. A clear OLED display provides constant (or time-limited) information about the current temperature, selected function and current switching status of the integrated relays.EXAMPLES OF USE:Replacement for defective thermostats in heating systems, as a replacement control for air conditioning systems, for monitoring and controlling temperatures, e.g. in the production of beers and spirits or in greenhouses for temperature-controlled ventilation.