A bimetallic strip is a simple device which converts thermal energy into mechanical motion. It is used as a thermally activated switch or heat indicator and works on the principle of differential expansion of heated dissimilar metals. The bimetallic strip is made up of two different metals which are bonded together to form a straight, flat strip or a concentric coil. When the strip is heated, one of the metals heats up and expands faster than the other, causing the strip to bend. This mechanical deflection is then harnessed in various ways to switch electrical circuits or move a dial to a give heat value indication. When any solid, fluid, or gas is heated, its molecules start to move away from each other leading to expansion.
What is a Bimetallic Strip?
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What is a Bimetallic Strip?
A bimetallic strip is a device which is used to convert thermal energy into mechanical motion. It is used as a thermally triggered switch and works on the principle of differential expansion of heated unalike metals. The bimetal strip is made up of two different metals which are joined together to form a flat strip. When the strip is heated, one of the metals gets heated and expands faster as compare to other, causing the strip to bend.
What is Bimetallic Strip : Construction and Its Types
Bulb thermometers are good for measuring temperature accurately, but they are harder to use when the goal is to control the temperature. The bimetallic strip thermometer, because it is made of metal, is good at controlling things. The principle behind a bimetallic strip thermometer relies on the fact that different metals expand at different rates as they warm up. By bonding two different metals together, you can make a simple electric controller that can withstand fairly high temperatures. This sort of controller is often found in ovens.
Click to see full answer. Furthermore, what is a bimetallic strip used for? A bimetallic strip is used to convert a temperature change into mechanical displacement. The strip consists of two strips of different metals which expand at different rates as they are heated, usually steel and copper, or in some cases steel and brass. Secondly, how do you make a bimetallic strip?
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