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The ins and outs of temperature mapping

Estimated reading time: 5 minutes

Temperature mapping (or thermal mapping/thermal validation) is performed when storing temperature-sensitive goods, e.g., medicines, tissue samples, or vaccines, to test and document that your refrigeration and freezing equipment is able to maintain temperatures within the required range.

Temperature mapping is crucial for the process of validating equipment

For GxP and FDA-regulated companies, temperature mapping helps to prove that the equipment complies with the guidelines set by authorities and auditors. If the study shows that the equipment does not meet the criteria, the equipment is calibrated or fixed and a new study is conducted. In addition, you become aware of areas that are too hot or too cold to be used, e.g., close to the door or the back of the cooling equipment.

Read more: Controling temperature in your cooling equipement during summer

Temperature mapping benefits your temperature monitoring

A temperature mapping/thermal mapping/thermal validation (we know) study will provide you with information on where to best place your temperature monitoring equipment. This ensures that you receive an alarm immediately if temperatures are above or below the required temperature range.

Perform temperature mapping on fridges/freezers before use

Inside a fridge, temperatures can fluctuate by several degrees. The temperature in your kitchen fridge e.g., can vary by as much as 5 degrees from the top to the bottom. The same principle applies to industrial fridges and freezers. Therefore, it is paramount to perform a thermal validation of your new equipment before it is put into use.

Read more: The steps of temperature mapping

Temperature mapping of refrigeration equipment with Eupry’s Kit

Save time by using Eupry’s Temperature Mapping Kit with accredited DANAK ISO17025 calibration and 21CFR PART11 compliance.

Mobile box

Practical mobile box with the numbers of data loggers (temperature sensors) needed.

Base station & batteries

A wireless base station and extra batteries.


All data loggers are START calibrated, and an END calibration is performed.

Recommendations on temperature mapping equipment and software

A temperature mapping study is quite simple if you have the right equipment. We recommend using wireless dataloggers that automatically sends all data to a server, where it can afterwards be easily analyzed in an app or web browser. Here it is also important that you are able to export reports within specific time periods if e.g., an auditor requests the information. Overall, great validation software can reduce time spent on execution, data analysis, and report generation.

Eupry’s online documentation system, the Eupry Logger, excels in ease of use and security. Temperature data logs are illustrated in graphs and data can be exported in the approved PDF-format. You are also able to easily find documentation for recent calibrations and manage data logs in multiple locations. All data are stored in ISO9001 / ISO27001-certified environment.

CHECKLIST 9 temperature mapping mistakes to avoid

Download your own checklist for 9 temperature mapping mistakes to avoid

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Installation process

The level of difficulty of the installation process is worth considering. If it requires technical expertise you might end up spending valuable time to hire a technical consultant.

Eupry’s WiFi data loggers are shipped by mail to your location. The installation process is easy and requires no prior technical knowledge. We have a comprehensive set of guides to help you get up and running. If you encounter problems, our support center and staff are always happy to help.

Calibrated dataloggers

It is important to check that dataloggers are calibrated and come with a certificate documenting that they are calibrated within a reasonable limit and timespan. Typically, 0.5C precision and a maximum calibration interval of 1 year will be sufficient.

When using Eupry’s dataloggers, you can choose to have the wireless dataloggers calibrated in our ISO 17025 accredited laboratory or via traceable 3-point calibration. As part of Eupry’s service, new calibrated data loggers are shipped annually to your address. The old data loggers are afterwards simply replaced with the new ones and sent back to us. The annual calibration is included in Eupry’s service.

Battery lifetime

The battery lifetime of the data loggers is a simple but crucial element. You do not want to experience that batteries are depleted during the temperature mapping study. Eupry’s dataloggers have a battery lifetime of 2 years and they are replaced once a year. Therefore, the battery life never becomes an issue.


If you need help in connection with completing the temperature mapping study, it can be a great advantage to get professional support. Eupry has a dedicated online support center as well as fully trained staff available to call or email whenever you need help. If allowed by the user, Eupry’s staff can also look at your system and assist you with the installation and configuration process.

FDA 21 CFR Part 11

It is recommended to comply with 21 CFR PART 11 if you operate in the US. market within industries such as drugs & medicine, food or tobacco. 21 CFR PART 11 refers to the regulations set forth by the FDA regarding electronic records and electronic signatures. The purpose of the regulation is to ensure that electronic records can be trusted in the same way that handwritten records and signatures on paper are trusted.

Eupry’s solution comes with both accredited DANAK ISO17025 calibration and 21CFR PART11 compliance.

Get a complete temperature mapping guide

Download our complete temperature mapping guide for free

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Conducting the temperature mapping study

We have now covered a list of recommendations on what equipment and software to use when performing a temperature mapping study. The next step is to actually complete the study.

Download our temperature mapping guide which provides you with all the information you need to conduct an efficient thermal mapping study.

You will find tips on how to complete a thermal mapping/thermal validation study in cold rooms, freezers, fridges, warehouses, and storage areas as well as an FAQ section with answers to the most common questions that arise when conducting a thermal mapping/thermal validation study.

Completed temperature mapping study: What now?

When you have completed the temperature mapping study, you will have located the hottest and coldest areas. It will be of interest since the risk of temperature deviations during normal use is high in these areas.

If you have located areas unsuitable for temperature-sensitive items, we recommend marking those areas with tape. Simultaneously, you can note which areas are within the temperature limits and thus can be used for storing critical goods. You can also use this data to determine the most suitable placement of your temperature monitoring devices.

When choosing equipment for monitoring temperatures, using a temperature monitoring system with an alarm function can be very beneficial. It notifies you immediately if the equipment fails or does not work properly. This way deviations can be discovered immediately, which will save valuable goods.

Also check out: Why is the temperature fluctuating in my cooling equipment?

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