Mechanical temperature controller / temperature controller for wet rooms THERMASREG® TR 22 with switching output (single-stage) and copper capillary, operating without external power supply. It is used for monitoring and controlling temperatures in heat generating plants, in heating, ventilation and air conditioning systems, for ventilation, cooling and climate control in rooms, cold rooms, greenhouses, nurseries, stables, breeding rooms, as an industrial room thermostat or surface-mounted thermostat in industrial applications as well as in wet and outdoor areas.