Thanks to its impact-resistant housing with high-quality plastic cover and die-cast aluminum base, the mechanical surface-mounted double thermostat is very robust and can also be used under harsh conditions. The device consists of a temperature controller and a safety temperature monitor (STW). The temperature of the temperature controller is set using a setpoint adjuster on a scale. The desired switch-off temperature of the safety temperature monitor can be set on a scale using a screwdriver after removing the housing cover. <,br>,The temperature controller is characterized by a high switching point accuracy of +0/-1.5% in the upper third of the scale and has a switching differential (hysteresis) of approx. 3 to 4% of the scale range. It switches off when the switch-off point is reached and automatically returns to its original state when the temperature falls below the switch-off temperature by the value of the switching differential. <,br>,The safety temperature monitor is characterized by a high switching point accuracy of +0/-5% in the upper third of the scale and has a switching difference (hysteresis) of approx. 4 to 6% of the scale range. It switches off when the switch-off point is reached and automatically returns to its original state when the temperature falls below the switch-off temperature by the value of the switching difference. The safety temperature monitor also has a self-monitoring function so that if the measuring system is destroyed, the STW circuit remains permanently open. The STW switching contact is then in a neutral position so that no contacts are switched. Furthermore, when the sensor cools down to a temperature below approx. -20 °C, the circuit is also opened; the contact is only closed again when the temperature rises above approx. -20 °C.<,br>,A decisive advantage is that no additional auxiliary power is required to measure the temperature. The electrical connection is made via screw terminals dir
