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독일 본사 직영 법인
2026-10-19: When cooling fails
Why temperature monitoring needs an independent measurement solution
In October 2026, hundreds of refrigeration systems in supermarkets in France were manipulated remotely. According to reports, the control system was programmed to allow refrigerated cabinets to reach temperatures of up to 50°C. Many stores had to dispose of large quantities of fresh and frozen goods. The incident is an extraordinary example, the question behind it is a fundamental one. What happens if the system that controls a cooling system also monitors the condition of the device at the same time?
The fundamental problem: control and oversight in one hand
Modern refrigeration systems are connected. Remote maintenance and error alarms make operation easier and have become indispensable in everyday life. But they also offer an extended attack surface.
Especially if the control system of the cooling units also reports the status of the appliances at the same time, the risk of total failures and economic consequential damage increases. This is because this form of appliance architecture does not offer a solution for this type of incident.
But this problem does not only affect supermarkets. Restaurants, distribution centers and production plants also depend on stable temperatures. The same logic applies there: the damage occurs before anyone notices that something is wrong.
An independent measuring system as a second pair of eyes
A simple countermeasure is to measure the temperature independently of the controller. Radio-based data loggers are placed directly in the refrigeration cabinet, cold room or freezer room. They measure the air temperature, work separately from the refrigeration control network and transmit the measured values to a cloud.
If a measured value leaves the defined area, an alarm is sent to responsible people by e-mail, SMS or app push.
This is exactly where systems such as testo Saveris Food come in:
Monitoring remains in place even if the controller fails or is tampered with
Deviations are reported to the people who can react in the shortest possible time
All measured values are automatically and seamlessly documented for verification and audits
A monitoring system is therefore to be seen as additional protection to the safety measures at the device control system. It complements these and takes effect in the event of other causes such as an open door or device-related power failures. The effect depends on how the system is used, where the sensors are located, how the alarm chain is structured and whether the power supply and communication are separated from each other.
Practical questions for your company
Regardless of which system you use, it's worth taking a quick look:
Does my monitoring system detect a failure if the controller itself is affected?
Who receives alerts, and how quickly does they respond outside of business hours?
Which goods would be affected in an emergency and how much time is left until the critical limit?
Conclusion
Past events confirm that cold chains are part of critical infrastructure. They are the basis for ensuring that food safely travels from the manufacturer to the consumer. If this chain fails, the consequences are not only economic, but also relevant in terms of health and society. The incident also makes it clear that cyber risks are not just about data. When networked devices are tampered with, the result can be spoiled goods, the risk of fire, and a loss of trust among customers and partners. The solution starts with a simple rule: The place that reports the condition should not be the same one that can change it. If you pay attention to separating measurement and control when planning cold chains and regularly check whether alarms are arriving, you create a more resilient basis for food and operational safety.
