A thermostat that controls the temperature

Irons, room heaters, geysers, etc., which are heated by V gas, are equipped with automatic shut-off in case of overheating. This arrangement reduces the chance of accidents. A thermostat is used to control the temperature in such equipment. Thermostats are used in different ways in different appliances. If there is a heater in the house, a thermostat is useful to prevent the room from overheating at night. This device can be hung on the wall. A thermostat works on the principle that metal expands when heated and contracts when cooled. This principle is widely used in this yantra with two small brass or iron wheels. The effect of heat on various metals decreases with increasing. Iron expands more with heat and brass or copper expands less. Heating two bars of iron and brass together creates this fluctuation. Both bars bend to one side on heating. As the strip bends, it moves away from the current circuit and the current stops. As the strip cools down to its original position, the circuit automatically connects and restarts the heater, thus preventing the thermostat from overheating the equipment.

A modern thermostat uses two discs filled with different gases instead of a metal bar. Air disc thermostats work faster and more efficiently as heat and cold affect the gas faster.