The surface mount thermostat works on the principle of volume expansion, if the temperature of the filling medium inside the probe increases the volume increases which results in the elevation of a diagrapm that triggers a microswitch.
IP54 Rated 1xSPDT switching contact Temperature control or temperature monitoring functions Differential of 3-4%
Note
With the ATHs-1 the switching point can be adjusted from the outside, with the ATHs-2 the switching point can be adjusted on the inside. U= Screw in pocket, UZ=screw in pocket with extension