Selecting a Bimetallic Thermometer on Amazon.com
A bimetallic thermometer, also called a bimetal thermometer, uses a strip of two metals, such as brass and steel, to measure temperature. The two metals are connected lengthwise but expand at different rates when heated, causing the strip to coil or bend and moving the dial to indicate the temperature. The scale may be in Fahrenheit or Celsius, and some thermometers have a dual scale dial. A bimetallic stemmed thermometer has a stem at the back of the dial and is commonly used in food service applications to measure the temperature of meats or other food products. A pocket thermometer may have a sheath for its probe. Other applications for a bimetallic thermometer include surface mount thermometers for use in ovens, boilers, industrial process lines, motors, or generators, and hanging thermometers for use in ovens. Some are encased in plastic for use in a freezer or refrigerator.