IoT Technologies Ltd

Cold storage monitoring for the warm-up no one is watching

A cold room fails quietly. A compressor degrades, a door seal weakens, someone leaves a door ajar on a Friday evening — and the temperature drifts for hours before anyone knows. Our battery-powered tags sit inside the cold space, report temperature continuously, and raise an alarm the moment it moves out of band, with door-contact tags catching the commonest cause before the stock is ever at risk.

IoT Technologies builds retrofit cold storage monitoring for any refrigerated application — cold rooms, freezers, chilled cabinets, deep freeze and biomedical storage — with real-time alerts, timestamped records and no rewiring of the equipment you already run.

Book a site surveyDiscuss cold storage monitoring
Illustrative IoT Technologies cold storage monitoring tag fitted inside a commercial freezer, with real-time temperature and door alerts.

What it is

Continuous temperature and door monitoring that catches the drift while there is still time.

Reports from inside the cold space

Sub-GHz radio penetrates insulated panel, metal cladding and dense racking where Wi-Fi and Bluetooth fail, so the tag sits with the stock, not in a compromise position near the door.

The drift raises the alarm

Temperature is reported continuously and an alarm is raised the moment a reading moves out of its set band — not discovered at the next manual check.

The door is the leading indicator

Door-contact tags report the moment a door opens, and an open-too-long rule catches the door that never closed before the stock is at risk.

Rated to −55°C

Military-grade battery chemistry rated to −55°C puts deep-freeze and blast-freeze operation within spec, not at the edge of it.

Battery-powered tags sit inside the cold space, report temperature continuously and raise an alarm the moment a reading moves out of band — with door-contact tags catching the commonest cause first.

A manual temperature log records what the temperature was at check time. A cold space that reports its own state in real time is a different proposition: the drift itself raises the alarm — overnight, at weekends, and on every day nobody happens to look — while there is still time to move stock, close the door or call the engineer.

Most temperature excursions start with a door. A door-contact tag reports the moment a cold room door opens, and an open-too-long rule catches the door that never closed, before the temperature has drifted far enough to threaten the stock. Alerts route to the responsible people by dashboard, email or SMS, with escalation if an alarm goes unacknowledged, so a 2 a.m. excursion gets a 2 a.m. response.

The tags are built for the environment: military-grade battery chemistry rated to −55°C, and sub-GHz radio that penetrates insulated panel, metal cladding and racking where Wi-Fi and Bluetooth fail. Every reading, excursion and door event is recorded as it happens, so the continuous timestamped record that HACCP-style due-diligence regimes ask for builds itself.

01

Definition

What is cold storage monitoring?

Cold storage monitoring uses battery-powered sensor tags placed inside refrigerated spaces to report temperature continuously and raise an alert the moment a reading moves outside its set band. Instead of a manual log recording what the temperature was at check time, the cold space reports its own state in real time — overnight, at weekends, and on every day nobody happens to look. Door-contact tags report the moment a door opens or fails to close, and every reading and event is logged with its timestamp, building a continuous record for each space.

02

The silent-failure problem

Spoilage is discovered, not detected

Refrigeration rarely fails loudly. A compressor loses capacity gradually; a seal degrades; a door sits ajar behind a pallet. The temperature climbs over hours, the stock crosses its safe threshold quietly, and the loss is discovered on the next visit — often a full weekend later. Manual temperature checks record history; they do not catch events. Continuous monitoring inverts this: the drift itself raises the alarm while there is still time to move stock, close the door or call the engineer, and the record shows exactly when the excursion began and ended.

03

Alerting

Alarms that reach someone out of hours

Cold storage fails at the worst times by definition — the failures that matter are the ones that happen when nobody is on site. Alerts route in real time to the responsible people by dashboard, email or SMS, with escalation if an alarm goes unacknowledged, so a 2 a.m. excursion gets a 2 a.m. response rather than a Monday discovery. Tag health — battery state, signal quality, regular check-ins — is monitored alongside the readings, so a silent sensor is itself flagged as an exception.

04

Doors and contacts

The door is the leading indicator

Most temperature excursions start with a door. A door-contact tag reports the moment a cold room door opens, and an open-too-long rule catches the door that never closed — before the temperature has drifted far enough to threaten the stock. Pairing door events with the temperature trace also answers the operational question after the fact: whether an excursion was a failure or just Friday's loading left unfinished.

05

Extremes and specialised storage

From chilled cabinets to −55°C

The tags run on military-grade battery chemistry rated to −55°C, so sustained operation in deep-freeze and blast-freeze conditions is within spec, not at the edge of it. The sub-GHz radio penetrates insulated panel, metal cladding and racking where Wi-Fi and Bluetooth fail, so the tag reports from inside the cold space, not from a compromise position near the door. For specialised applications — medicine cabinets, biomedical storage, cold chain consignments in transit — we spec the build to the application, including sensor placement, reporting interval and alert thresholds appropriate to the stock.

06

Compliance evidence

A record you did not have to write

Continuous timestamped logs provide the temperature evidence that HACCP-style due-diligence and stock-assurance regimes ask for, without anyone walking round with a clipboard. Every reading, excursion and door event is recorded as it happens, so the record is complete rather than sampled. The platform provides the evidence trail; it does not replace the statutory duties or competent persons a regime requires.

07

Who it is for

Operators and the companies who supply them

Food production, logistics and warehousing, hospitality, retail, pharmacies and laboratory-adjacent storage — anywhere stock value or product integrity depends on a temperature band being held. Increasingly it is also the refrigeration providers themselves: a supplier whose cabinets and cold rooms indicate only on site can fit tags at installation and offer real-time alarms as part of the product.

Deployment approach

Start with a survey of the cold spaces you run, then fit the tags.

Cold storage monitoring begins with the spaces and temperature bands you already operate, not with a catalogue of sensors.

We survey the cold rooms, freezers and cabinets you want visibility of, then place temperature tags inside each cold space and door-contact tags on the doors that matter, and configure the alert bands, routing and escalation. Because the tags retrofit to the equipment you already run and report over sub-GHz radio, installation is a survey followed by fitting — no rewiring, and nothing about the refrigeration itself is touched.

Survey

Look at the cold rooms, freezers and cabinets you run, the temperature bands each must hold, and the doors that lead excursions.

Site survey

Fit

Temperature tags are placed inside each cold space and door-contact tags on the doors — retrofit, with nothing rewired.

Tags fitted

Configure

Set the alert band for each space, door open-too-long rules, and routing by dashboard, email or SMS with escalation.

Alarms set

Prove

Confirm readings arrive from inside the cold space, door events fire, and alarms reach the right people out of hours.

Pilot proven

Scale

Roll the same pattern across more spaces and sites — every cold room, freezer and cabinet on one continuous record.

Estate rollout

Bring the cold spaces you run and the temperature bands that matter. We will scope a practical monitoring pilot and quote per project.

Book a site survey

Where it applies

Wherever stock value depends on a temperature band being held.

Cold rooms and walk-in freezers

Continuous temperature from inside the space and door events from the entrance — the drift and its commonest cause on one trace.

Chilled cabinets and display

Cabinet-level monitoring for chilled retail and hospitality stock, with alert bands set to the product.

Deep freeze and blast freeze

Battery chemistry rated to −55°C keeps sustained deep-freeze and blast-freeze operation within spec.

Medicine cabinets and biomedical storage

Specced bespoke — sensor placement, reporting interval and alert bands set to the product's requirements, down to cabinet level.

Cold chain consignments

For cold chain consignments in transit, the build is specced to the application, with thresholds appropriate to the stock.

Refrigeration providers

A supplier whose cabinets and cold rooms indicate only on site can fit tags at installation and offer real-time alarms as part of the product.

FAQ

Frequently asked questions

What is cold storage monitoring?

Cold storage monitoring uses battery-powered sensor tags inside refrigerated spaces to report temperature continuously and raise a real-time alert the moment a reading moves outside its set band. Door-contact tags report doors opening or failing to close, and every reading and event is logged with a timestamp, building a continuous record for each cold space.

Will the radio work from inside a cold room or freezer?

Yes. The tags communicate over low-power sub-GHz radio, which penetrates insulated panels, metal cladding and dense racking far better than Wi-Fi or Bluetooth. Tags are placed inside the cold space where the stock actually is, and report from there.

What temperatures can the tags operate at?

The battery chemistry is military-grade and rated to −55°C, comfortably covering chilled storage, commercial freezers at −18 to −25°C, and deep-freeze and blast-freeze applications. For extreme or specialised environments we confirm the spec against the application at survey.

How quickly does an alert arrive after a breach?

In real time. The moment a reading crosses its threshold or a door event fires, the alert routes to the dashboard and to the right people by email or SMS, with escalation if unacknowledged. There is no polling delay waiting for the next manual check.

Can the records be used for HACCP-style record-keeping?

Yes, as evidence. Continuous timestamped temperature logs and door events provide the due-diligence record such regimes ask for, complete rather than sampled. The system supplies the evidence trail; responsibility for the regime itself stays with the operator.

Can you monitor medicine cabinets or biomedical storage?

Yes. Pharmaceutical and biomedical applications are specced bespoke — sensor placement, reporting interval and alert bands set to the product's requirements — and the same real-time alerting and continuous record applies down to cabinet level.

Catch the warm-up
while the stock is still safe.

Tell us about the cold spaces you run — cold rooms, freezers, chilled cabinets or specialised storage — and the temperature bands that matter. We will scope a practical monitoring pilot and quote per project; the tags retrofit to what you already run.

Location

Venator House, 15-17 St Stephen's Road, Bournemouth

Dorset BH2 6LA · VAT GB 409644484

Book a site surveyExplore solutions

Cold storage enquiry

Tell us about the cold spaces, the temperature bands that matter and how alarms should reach your team.

No mailing lists. No spam. We reply directly to your enquiry.