Immersion Heater:An immersion heater is a type of electrical heating element that is used to heat liquids, such as water or oil. It consists of a metal coil that is immersed in the liquid to be heated. The coil is connected to an electrical power source, which heats the coil and causes the liquid to be heated. Immersion heaters are used in a variety of applications, such as home water heaters, industrial process heating, and space heating.