Z Sensors display different temperature readings
If you are using multiple Z Sensors to monitor the temperature in your fridge or freezer, you may get two different readings. In a constantly changing environment, like a refrigerator or freezer, a sensor's response time is equally important as its accuracy. Two calibrated sensors can read different temperatures depending on their response times.
Below are some reasons why a temperature difference may exist.
Overview
Microclimates within fridges and freezers can account for a ±10ºC difference based on the sensor location. You can learn more in a government report published by NIST.
SmartSense sensors are programmed to take temperature readings at specific intervals (5 minutes, 15 minutes, 30 minutes, etc.). When compared to a second thermometer, the time a temperature reading was taken may cause a disparity.
SmartSense sensors measure temperature with an accuracy of ±0.5ºC. All sensors leaving the manufacturer's factory are compared against a NIST traceable reference. This is available upon request. This letter is not a calibration certificate and cannot be used in place of a calibration certificate.
How to determine sensor accuracy
The best way to guarantee the accuracy of a sensor is to purchase a SmartSense calibration service. The SmartSense Support Team can assist you.
- The sensor will ship to an accredited laboratory to compare it to a NIST traceable reference thermometer.
- The calibration certificate generates the recorded temperature from your sensor and the reference temperature.
- Ensure the sensors are recording information using the correct unit of measurement (Fahrenheit or Celsius).