Digital thermometers are instruments used to measure the temperature of air, liquids, or surfaces electronically. They may measure temperature in Celsius, Fahrenheit, or both. Most digital thermometers use thermistors, which are small electronic resistors. Thermistors are made out of metals that conduct electricity within a certain range and become more conductive the warmer they get. A microcontroller inside the thermometer measures this electrical conductivity and converts it to a temperature, which is displayed on an LCD. Digital thermometers are used in a wide range of applications, including in laboratory settings, food service and storage, and in doctors offices and hospitals.
CANNON Instrument Company manufacturers viscosity measurement products, including custom viscosity/density standards, and provides testing and certification of samples. The company, founded in 1938 and located in State College, PA., is a National Institute of Standards and Technology delegate for provision of U.S. national standards for viscosity measurement.