DIN thermostats are devices designed to regulate the temperature within a given environment. The "DIN" in the name refers to the Deutsches Institut für Normung (German Institute for Standardization), which sets the standardized measurements for these thermostats. A DIN thermostat typically uses a bi-metallic strip, a liquid expansion element, or a solid-state sensor to monitor and control temperature. The thermostat is then able to activate or deactivate heating or cooling mechanisms to maintain the desired temperature.