Data loggers come in all shapes and sizes utilising different sensing technology from thermocouples to PT1000 sensors. The price and quality of these data loggers varies dramatically and the selection of sensor should be considered prior to perform a temperature mapping study.
We selected various calibrated data loggers with internal and external probes and placed them adjacent to each other in a -20°C Freezer. The graph below shows a snapshot of the results, comparing an external sensor logger to an internal sensor logger.
- Will the selection of the data logger impact the results of the temperature mapping study?
- Could a freezer pass with one data logger type and fail with another?
We selected various calibrated data loggers with internal and external probes and placed them adjacent to each other in a -20°C Freezer. The graph below shows a snapshot of the results, comparing an external sensor logger to an internal sensor logger.
From the graph you can clearly see the temperature fluctuations of the freezer in the external sensor. The internal logger however does not record the same extreme temperatures. The air within the sensor acts as a buffer, effectively buffering the temperature fluctuations.
If you’re writing a risk assessment into the temperature mapping of your controlled temperature environments, consideration should be given to the sensors used to perform the mapping. Will the buffering effect of internal sensor impact the accuracy of your mapping exercise?
If you would like to read our full report on sensor selection and probe buffering please contact us.
If you’re writing a risk assessment into the temperature mapping of your controlled temperature environments, consideration should be given to the sensors used to perform the mapping. Will the buffering effect of internal sensor impact the accuracy of your mapping exercise?
If you would like to read our full report on sensor selection and probe buffering please contact us.
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