A rheostat is an electrical device that is used to alter the strength of electrical power to varied degrees without actually completely interrupting the flow of electricity. A good example of this device is a dimmer or slider switch on a light in a room. This allows the light to change in intensity without actually turning off the light. The rheostat can also be used in a variety of industrial applications to maintain control over how fast or slow a device might work. The concept of the rheostat is not new coming into light in the 19th century when British inventor Charles Wheatstone had an idea.
You can purchase rheostat switches at a local hardware or building supply store. They are used readily in the development of designs for interiors and exteriors the world over. The rheostat that is used in industrial settings is typically enclosed in sealed components so that the dust, moisture and other particles are not able to change the way that the device works. Additionally, this helps to reduce the risk of electrical shock and keeps the device safe from harm. Shock danger is possible and it is safer when these devices are left to sealed areas.