How to Read a Refrigerator Thermometer

Refrigerator thermometers are digital temperature-monitoring devices powered by a lithium battery.

Although most modern refrigerators come with a built-in thermometer, these are typically analog or dial meters and do not always display the exact and/or correct internal temperature of the refrigerator, freezer or crisper compartments. Homeowners and restaurateurs use refrigerator thermometers to monitor the performance of their refrigerators to adjust the temperature to save energy and/or preserve food.

Turn the refrigerator thermometer to the "On" position. Set the refrigerator thermometer to read Fahrenheit or Celsius by manipulating the selector switch located on the refrigerator thermometer.

Place two refrigerator thermometers in the refrigerator next to one another. Allow 30 to 60 minutes to pass, and then take the reading of both meters by noting the temperature display.

Compare the temperatures displayed with one another, along with the temperature reading on the built-in analog or digital thermometer to establish a baseline.

Read the refrigerator thermometers in increments of one-hour intervals for a period of four to five hours to see whether the internal temperature is consistent. Adjust the refrigerator's temperature regulator so that the temperature is under 40 degrees Fahrenheit.

About the Author

Owen Richason grew up working in his family's small contracting business. He later became an outplacement consultant, then a retail business consultant. Richason is a former personal finance and business writer for "Tampa Bay Business and Financier." He now writes for various publications, websites and blogs.