This thermostat makes it possible to start and stop a water-jacketed pellet stove based on the accumulator tank temperature. You can adjust the temperature on a scale of 0–100 °C, and in addition, you can set a hysteresis of 0–10 °C. When you set, for example, the temperature to 70 °C and the hysteresis to 5 °C, the stove will ignite at 65 °C and turn off at 75 °C. A sensor for the water pocket of the accumulator tank is included. Control is achieved by the closing and opening of a relay contact.