Guide · food & hospitality
Fridge monitoring for restaurants and cafes.
A busy kitchen runs on cold storage nobody has time to watch. A restaurant fridge left ajar after service, a cafe display unit failing overnight, a freezer drifting on a long weekend: each one quietly writes off stock while the place is shut. Fridge monitoring is the cheap insurance against that, and this guide covers what to watch across a kitchen, how many sensors you actually need, and how one alert and one automatic log protect both the stock and your standing at inspection.
What a restaurant or cafe fridge should hold
Cold potentially hazardous food belongs at 5°C or below, and most kitchens run their fridges at 2°C to 4°C for a safe margin. Freezers sit at minus 18°C or colder. The food safety danger zone runs from 5°C to 60°C, so the moment a fridge creeps past 5°C is the early warning worth catching, long before anything smells wrong.
The trouble in a real kitchen is not knowing the number, it is that nobody is free to check it every hour through a service. Between the lunch rush, a delivery and close, a fridge can sit warm for a long time before anyone opens it and notices. That gap between "looks fine" and "is fine" is where the loss lives.
How many sensors does a kitchen need?
One per independent cold space you rely on. Every unit that can fail on its own gets watched on its own.
- Each fridge and freezer in the kitchen, front and back of house.
- The coolroom, if you have a walk-in.
- Prep and display units that hold food for service, including the ones customers see.
- The delivery or stock fridge out the back that is easy to forget and easy to lose.
The exact count comes down to the layout, and our note on how many temperature sensors a kitchen needs works through a typical site. The principle is simple: a space you would lose real money on if it failed is a space worth a sensor.
What a fridge monitoring system actually does
A wireless sensor sits in each fridge or freezer and reports its temperature to a dashboard. It raises an alert the moment a reading crosses the threshold you set, or the moment a door is left open past a grace period. Every reading is logged, so alongside the live warning you build a continuous, timestamped record without anyone touching a clipboard.
Two things make it work in a real kitchen. It has to ignore the normal cycle: fridges and freezers defrost and a reading spikes then settles, so a sensible setup uses a threshold with a short delay plus a trend rule, or staff learn to ignore the alarm. And the alert has to reach whoever is on that night by a channel they will see, SMS, email or a call, after hours included, and keep working in a blackout on battery and a cellular link rather than the shop wifi that dies with the power.
The silent losses a cafe or restaurant actually hits
None of these announce themselves. A door not sealed after a delivery, a tiring compressor losing ground over weeks, a power cut over a public holiday, an iced-up evaporator choking the airflow while the unit still hums along sounding normal. They all creep, which is why watching the trend beats watching a single number. If you have already had the near miss, our guide to catching a failing fridge or coolroom before stock spoils covers the warning signs in detail.
Logs, and the council inspection
Continuous, timestamped logs are exactly the audit-ready evidence an authorised officer wants to see, and they are far stronger than a hand-written sheet that gets skipped on a busy day or back-filled at close. An officer can tell the difference. The honest comparison of the two, and why automatic wins, is in manual temperature logs versus automatic. Be clear on what monitoring does: it gives you the records and the alerts, the compliance obligation stays with you, and we do not sell a certification.
One system for the fridges, freezers and coolroom
Every fridge, freezer, prep unit and walk-in coolroom can sit on the one dashboard, each with its own safe range and its own escalation, so the whole kitchen is watched the same way and there is one record to show. Freezers behave differently and are covered in freezer temperature monitoring for a food business; for a walk-in cool room specifically our spoke Coolroom Alarm is purpose-built. And if a fridge keeps tripping or struggling, it is worth checking whether it needs its own circuit. For the full overview, see the temperature monitoring guide.
Common questions
What temperature should a restaurant fridge be?
A commercial fridge holding potentially hazardous food should be at 5 degrees Celsius or below, and many kitchens run 2 to 4 degrees for a safe margin. Freezers sit at minus 18 or colder. The food safety danger zone runs from 5 to 60 degrees, so a fridge drifting above 5 is the early warning worth catching.
How many sensors does a cafe or restaurant kitchen need?
One per independent cold space you rely on: each fridge, each freezer, the coolroom, and the prep or display units that hold food for service. The point is that every space that can fail on its own is watched on its own. Our sensor-count guide walks through a typical kitchen.
What is a restaurant fridge monitoring system?
A wireless sensor in each fridge or freezer reports the temperature to a dashboard and raises an alert the moment a unit drifts out of range or a door is left open. Every reading is logged, so you get both the early warning and a continuous timestamped record, and the alert reaches whoever is on that night by SMS, email or call.
Will it wake me up over a normal fridge cycle?
It should not. Fridges and freezers cycle and defrost, and a reading spikes briefly then settles. A sensible setup uses a threshold with a short delay plus a trend rule, so a genuine drift is flagged but a routine cycle is not. An alert staff learn to ignore is worse than none.
Does it help with a council food safety inspection?
Yes. Continuous, timestamped logs are the audit-ready evidence an authorised officer wants to see, and they are stronger than a hand-written sheet that gets skipped or back-filled. Monitoring gives you the records and alerts; the compliance obligation stays with you, and we do not sell a certification.
Can one system cover the fridges, freezers and the coolroom?
Yes, and it should. Every fridge, freezer, prep unit and walk-in coolroom can sit on the one dashboard with its own safe range and its own escalation, so the whole kitchen is watched the same way and there is one record to show. For a walk-in coolroom specifically there is a purpose-built spoke.
Stop losing stock to a fridge nobody was watching.
Tell us your kitchen and sites and we will come back with a plan and a price. Door and trend alerts, audit-ready logs, installed and monitored.