Different Temperature Readings

If  you are using multiple devices to monitor temperature in you fridge or  freezer, it is possible that you will get two different readings. Here  are some reasons why a temperature difference may exist.


  • Microclimates that exist within fridges and freezers can account  for a 10 degree +/- temperature difference based on the location of the  sensor. More information about this can be viewed in a government  report published by NIST.
  • Our sensors are programmed to  take the temperature at specific time intervals (5 minutes, 15 minutes,  30 minutes, and so on). When compared to a second thermometer, the time a  temperature reading was taken may cause a disparity.
  • Our  sensors are very accurate, and the manufacturer claims all sensors that  leave the factory are accurate to within 0.5 C. A letter from the  manufacturer that states that all sensors leaving the manufacturers  factory are compared against a NIST traceable reference, is available  upon request. This letter is not a calibration certificate and can not  be used in place of a calibration certificate.
  • The best  way guarantee the accuracy of any sensor is to purchase our calibration  service. We will send your sensor to an accredited laboratory to have it  compared against a NIST traceable reference thermometer, at several  points. The calibration certificate states the recorded temperature from  your sensor, as well as the reference temperature.
  • While  accuracy describes how close your sensor is to the actual temperature,  it assumes the temperature is stable. In a constantly changing  environment, like a refrigerator or freezer, the response time of the  sensor is equally as important as the accuracy. Two calibrated sensors  can read different temperatures depending on their response times.
  • Ensure  that the sensors are recording information using the correct unit of  measurement (Fahrenheit or Celsius). For more information on how to  change the unit of measurement in Sensor Cloud, please read Switching  the Units of Measurement.

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