Fridge Temperature Data Logger: The Complete UK Guide for Food Businesses

Short answer: a fridge temperature data logger records your fridge and freezer temperatures automatically, so you always have HACCP records an Environmental Health Officer will accept — without relying on a paper sheet that gets missed on a busy shift. Choose one that logs continuously, sit the probe so it reads the food rather than the air, and keep the readings where you can print them off.

If the food hygiene rating on your door decides whether people order from you, temperature records are the thing that keeps you up at night. Most small kitchens still run on handwritten records that get missed on a shift change, and when the fridge log has a gap, back-filling a missed reading is worse than the gap — that is falsifying a record. An automatic logger closes those gaps for you.

Why do food businesses need a fridge temperature data logger?

The everyday problem is people. When the kitchen is slammed no one remembers to write the fridge down, and when you are closed over the weekend the sheet is blank for two days. It only takes one chest freezer failing overnight to lose a whole load of stock before anyone notices on Monday. A logger records around the clock whether or not anyone is standing there, so a fault leaves a visible dip in the graph instead of a silent loss.

It also protects you at inspection. Instead of hunting for a clipboard, you export the log and print it off for the EHO — continuous, dated readings that show the fridge held temperature, and that you spotted and acted on anything that did not.

What does the law actually require?

In England, Wales and Northern Ireland, food that needs refrigeration must be kept at 8°C or below — this is set out in the Food Safety and Hygiene (England) Regulations 2013 and applies to the food, not just the air. In practice the FSA advises running the fridge at 5°C or below so door openings and deliveries never push the food over the line. Scotland uses a different framework but the same practical goal. Under HACCP you must monitor these temperatures, record them, and take corrective action when something drifts.

Where should the probe go?

Air temperature swings every time the door opens, so a probe waving in the airflow gives a misleadingly spiky reading. Sit the probe where it reflects the food: many kitchens stand it in a small container of liquid (or a glycol bottle) to mimic the thermal mass of a packed shelf, placed in the warmest part of the cabinet — usually the door or the top shelf. That gives a steady trace that matches what your stock is really doing.

One logger, several appliances

Because a four-channel unit records up to four K-type probes at once, a single logger can cover two fridges and a freezer together and keep them all in one record. For the technical side of running several probes from one device, see our guide to a multi channel temperature data logger, and if you are being asked to prove every corner of a cold store holds temperature, our temperature mapping data logger guide covers a full survey.

The DANOPLUS fridge temperature data logger

The DANOPLUS is a 4-channel, digital K-type thermocouple data logger, so one unit can record two fridges and a freezer at the same time and keep a time-stamped log you can save for your HACCP file. It is £72.11 inc. VAT (£60.09 ex. VAT), rated 4.8 out of 5 from 200 reviews, and comes with free UK delivery in 1–3 working days (via Royal Mail or DPD), a 12-month warranty and 30-day returns. It measures temperature; the 8°C and 5°C figures above are the UK legal and FSA-recommended limits you check your readings against.

Frequently asked questions

What temperature should a fridge be for a UK food business?

By law, chilled food in England, Wales and Northern Ireland must be kept at 8°C or below. The Food Standards Agency recommends setting the fridge to 5°C or below so that door openings and deliveries do not push the food above the legal limit. Freezers should run at −18°C or below.

How often do I need to record fridge temperatures?

Under HACCP you should check and record fridge temperatures at least daily and act on anything out of range. A data logger records continuously in the background, so you have a complete, time-stamped history rather than a single daily spot-check, and no blank days when you are closed.

Will an EHO accept data logger records?

Yes. Continuous, dated logger readings are strong HACCP evidence because they show the fridge held temperature over time and that you noticed and acted on any excursion. You export or print the log and keep it in your food safety records.

Where should I put the probe in the fridge?

Place the probe in the warmest part of the cabinet, usually the door or top shelf, and stand it in a small container of liquid so it reflects the temperature of the food rather than the air. Air readings spike every time the door opens and can look worse than the stock really is.