The EGO thermostat rated at 75 °C is a capillary-type temperature controller designed for precise regulation and safety cut-off in heating appliances. It combines mechanical reliability with accurate sensing, making it suitable for household, catering, and industrial applications.

• Sensor bulb: A sealed probe (commonly 4 mm diameter, ~228 mm length) filled with a thermally responsive medium.

• Capillary tube: A fine tube (~900 mm length) connecting the sensor to the membrane housing, transmitting pressure changes.

• Membrane system: Converts the pressure increase into mechanical movement.

• Switching mechanism: A 1-pole, 1NO (normally open) contact rated for 16A at 230–400V AC, ensuring safe disconnection when the set temperature is reached

• When the sensor bulb reaches 75 °C, the filling medium expands.

• Expansion increases pressure in the closed system, pushing the membrane.

• The membrane actuates the switch, cutting off or regulating power to the heating element.

• Once the temperature drops below the threshold, the system resets automatically (unless configured as a manual reset limiter).