Thermostat with graduated knob, single-pole, for installation in a junction box. The sensor is a flask that ends with a movable membrane. When the liquid in the flask is heated, excess pressure is transferred to the membrane, which deforms and opens the contact group. The opening temperature can be changed with the adjusting screw.

Temperature range: 0 to 45°C

**Note: This item is an old model. For newer models, see #632002 for older electric heaters or #632009 for newer electric heaters.