A thermostat that controls the temperature

Irons such as irons, room heaters, geysers, etc., which are heated by V-burner, have an arrangement to turn off the power supply automatically if it gets too hot. This adjustment reduces the chances of an accident. Thermostats are used in such equipment to control the temperature. Thermostats are used in different ways in different appliances. If the house has a heater, the thermostat is useful to keep the room from overheating at night. This tool can be hung on the wall. The thermostat works on the principle that the metal increases in size when heated and shrinks when cooled. This principle is used in a manipulative way with two small brass or iron prongs. The effect of heat on various metals is increasing and decreasing. Heat increases the area of ​​iron and less area of ​​brass or copper. This fluctuation is caused by heating two pairs of iron and brass strips. Both the strips tilt to one side as they heat up. If the strip is tilted then the current is removed from the circuit and the current is cut off. Once the strip cools to its original state, the circuit automatically reconnects and the heater restarts, thus preventing the thermostat equipment from overheating.

Modern thermostats use two discs filled with air instead of a metal bar. The effect of heat and cold on air is faster so the thermostat with air disc works faster and with greater efficiency.