Case Study: Extreme low temperature performance of data logger

In this case study, we are going to talk about the low temperature capability of temperature data loggers.

Here’s an example.

This report is generated by a unit of C1, has been used in a chemical transport application, and for some reasons the temperature has been set to extreme low condition.

The graphic chart shows, that the unit has been experiencing an extreme low temperature(below -50 °C ), and was struggling to work in normal status, but it still managed to record temperature in a wider interval. So what’s the story behind it?

We all know for each temperature logger, it has a working range, for example C1 is -30 to 70 °C as published in the specifications.

This means, to make sure the logger is recording any temperature between this range. The “extreme working temperature” should be wider than this range, and that’s why you can still get temperatures out of this range.

And in some extreme cases, like this one above which experienced around -50 °C , a reliable logger is developed with Active Protection Strategy(APS), to maximize the capability of recording in extreme conditions.

For end user, you need to find out the temperature range indicated by the maker, is “guarateed working range” or “extreme working range”.

Why is this useful and necessary? Because you never know the temperature your carrier may set to you goods, and surely you need to have the report in this case, especially the worst case.

Data list shown in the extreme conditions by Cydiance C1.