Selecting a Digital Thermometer on Amazon.com
A digital thermometer measures the temperature of air, liquids, solids, or surfaces electronically. A contact digital thermometer touches the substance or surface to be measured while a non-contact thermometer uses infrared technology to remotely measure the temperature from a distance. Temperature readings are displayed in Celsius, Fahrenheit, Kelvin, or some combination of the three on an LCD screen.
In many settings, a digital thermometer with probe is appropriate for measuring temperature. The probe contains a sensor, such as a thermistor or thermocouple, to generate a temperature reading. Some probes are designed to be immersed in a liquid, some penetrate a substance, and others may wrap or touch a surface.
A non-contact thermometer, called an infrared thermometer or IR thermometer, measures radiation emitted from a surface to determine its temperature. Infrared thermometers work from a distance using a detector called a thermopile. The thermopile converts the heat into an electric signal that can be rendered as a temperature reading. IR thermometers are commonly used in industrial settings involving equipment at high temperatures. Catering and food service venues may use infrared thermometers to monitor the temperatures of food products. Health care professionals may use an infrared ear thermometer to take a patient's temperature.
When selecting a digital thermometer, some considerations include the temperature range to be measured, the accuracy required by the application, and additional features a thermometer may offer. A digital thermometer with a thermistor sensor provides a high level of accuracy in a limited temperature range such as 90 degrees C to 130 degrees C, but a thermocouple sensor measures high temperatures where accuracy is less of a concern, such as in a furnace or kiln. Some digital thermometers can retain minimum and maximum temperature readings or may trigger an alarm when the temperature rises above or drops below a predefined set point.
Because temperature measurement is an important facet of many industries, digital thermometers are used in a wide range of applications, including scientific research, food service and storage, industrial and manufacturing processes, and in doctors' offices and hospitals. Manufacturers include Taylor.