An electronic device that automatically records temperature over time, giving a continuous record of storage or transport conditions.
An electronic device that automatically records temperature over time, giving a continuous record of storage or transport conditions. A data logger is a small electronic device that measures temperature at set intervals and stores the readings so they can be reviewed later. Instead of relying on someone remembering to check a fridge, a data logger builds a continuous record, which is especially useful for cold storage, freezers and refrigerated transport where conditions need to be proven over hours or days. Many can raise an alarm if the temperature drifts outside a safe range. In food safety terms, a data logger supports temperature control by capturing whether food stayed at or below 5 degrees C when cold, at or above 60 degrees C when hot-held, or frozen throughout. Because it records automatically and time-stamps each reading, it provides strong evidence for a food safety program and can reveal short excursions into the temperature danger zone that a twice-daily manual check would miss. Australian cold stores, transport operators and larger kitchens use data loggers in fridges, freezers and delivery vehicles to monitor the cold chain. A logger may be fixed in a cold room or travel with a load, and its readings are downloaded or sent wirelessly so managers can confirm conditions stayed safe and investigate any alarms. A data logger does not replace good practice at the food itself, so staff still use a probe thermometer to check the core temperature of food at receipt and during handling. The logger's records should be reviewed regularly, not just filed, and the device should be checked against a calibrated reference so its readings can be trusted during an inspection. A distributor delivering chilled meat places a data logger in each refrigerated truck. On arrival the receiving business downloads the log and sees the load stayed below 5 degrees C for the whole trip. When one delivery shows a spike to 8 degrees C for 40 minutes, the record lets both parties assess the food against the 2-hour / 4-hour rule before accepting it.
Frequently asked questions
What does a data logger actually do?
It automatically measures temperature at regular intervals and stores each reading with a time stamp, giving a continuous record of conditions in storage or transport.
Why use a data logger instead of manual checks?
Manual checks capture single moments, while a logger records continuously and can catch short temperature excursions that a twice-daily check would miss. Many also alarm when limits are breached.
Does a data logger replace a probe thermometer?
No. A logger monitors storage or transport conditions, but you still need a probe thermometer to check the core temperature of the food itself.
Do data loggers need calibration?
Yes. Like any measuring device, a data logger should be checked against a known accurate reference so its records can be trusted.
Are data loggers useful for transport?
Very. A logger travelling with a refrigerated load provides proof the cold chain held during transport and helps assess any temperature excursions on arrival.
