Mechanical temperature controller ⁄ wet room temperature controller THERMASREG® TR 040 ⁄ TR 060 with switching output (one-step), with stainless steel capillary (spiral coil sensor), which operates without an external voltage. It is used for monitoring and controlling of temperatures in heat generation plants, in heating, ventilation and air conditioning systems, for ventilation, cooling and climate control in halls, cold storage rooms, greenhouses, nurseries, stables, breeding rooms, as an industrial room thermostat or surface contact thermostat in industrial applications as well as in wet rooms and outdoor areas.