Temperature & Cold Chain Monitoring

Temperature and Cold Chain Monitoring

A reefer trailer leaves a Cape Town packhouse on Sunday afternoon with 22 pallets of citrus bound for the Durban port and a vessel sailing on Wednesday. At 03:14 on Monday morning, on the descent into Van Reenen's Pass, the compressor cycles off for nine minutes longer than the duty cycle says it should. Two pallets near the rear door warm by 1.4 degrees. The buyer in Rotterdam will reject any pallet outside spec at the other end. The difference between a delivered load and a rejected one is the alert that fires inside that nine-minute window, plus the temperature record proving the rest of the trip held spec.

Direct answer

TG Tracking Temperature and Cold Chain Monitoring covers refrigerated transport, cold storage, food production, server rooms and farming temperature applications on a single IoT sensor platform. Live multi-zone readings, threshold alerts, humidity and door sensing, compliance-ready logs and exportable reports run on the same platform as your Fleet Tracking and Management, Trailer Management and Business Intelligence Dashboards. For a deeper dive by application, see the sub-clusters below.

What cold-chain monitoring actually does

The platform watches temperature, humidity, door state and power state on every monitored zone, in real time, with audit-grade logs.

Live multi-zone readings

A reefer trailer typically runs front and rear zones, with pallet-level sensors where mixed loads make zone averages misleading. Cold rooms run zone sensors per chamber. Each sensor reports continuously; the platform stores every reading and surfaces graphs by zone, by trip, by date range and by load.

Threshold and deviation alerts

You set a safe range per zone and per cargo type. Breaches trigger SMS, email, app push notifications and API alerts to the people you designate, with an escalation tree if the first responder does not acknowledge. The alert carries the zone, the current reading, the trend and the location.

Door, humidity and power sensors

Door-open events in transit. Humidity drift outside the spec window for produce and pharma. Compressor power loss on a reefer or a generator-fed cold room during load shedding. Each one is a separate sensor input and a separate alert profile.

Compliance-ready logs and reports

Continuous time-stamped records, route-linked temperature history, automated compliance logs, PDF and Excel export and customer-facing delivery reports. The HACCP-style audit trail your QA team needs is a download rather than a project.

Cold-chain applications: where the platform is used

Cold-chain monitoring is one platform with five operating contexts. Each has its own sub-page with the configuration, sensor mix and reporting approach for that context.

Refrigerated transport

Reefer trailers, refrigerated trucks and refrigerated vans on long-haul, regional and last-mile routes. Citrus and stone-fruit exports, frozen and chilled retail distribution, ice-cream, dairy, meat and seafood. The full transport story is on Refrigerated transport, which sits under this pillar page.

Cold storage

Standalone cold rooms, multi-chamber storage facilities and distribution-centre cold zones. Multi-zone monitoring, door-open auditing and load-shedding power-loss detection. The storage story is on Cold storage.

Food production

Production-line chillers, blast freezers, pasteurisers and HACCP-controlled production environments. Continuous logs that match the audit trail your food safety officer is asked for at every external audit. See Food production.

Server rooms

IT data centres, server cabinets and edge sites where temperature and humidity drift outside spec is a hardware-failure precursor rather than a food-safety problem. The same sensor stack does the job. See Server rooms.

Farming

Greenhouse temperature and humidity, livestock-housing temperature, post-harvest cold storage on the farm, dairy bulk tanks and grain silos. The farming application is on Farming temperature monitoring.

Why TG Tracking for cold chain: the unbroken record

Cold-chain monitoring is not just about catching the breach. It is about being able to prove, in a way that survives audit, that the breach was caught and the rest of the load was inside spec.

A fragmented stack means a sensor vendor's portal, a reefer manufacturer's console, a fleet platform's GPS log and a QA team's spreadsheet, none of which line up at the time of a customer dispute or an audit. TG Tracking puts the temperature, humidity, door, power, GPS, trip and driver record in one timeline. When a load arrives at a customer in Rotterdam, Cape Town, Maputo or Durban with a query, the proof of an unbroken chain is one report rather than four. When a QA auditor asks for the last 90 days of cold-room readings on the seafood freezer at a Western Cape factory, the export is a click. When an insurer asks why a load was rejected, the temperature curve, the door event, the power loss and the GPS position are on the same page.

That single integrated record is what makes the platform a cold-chain system rather than a temperature gauge.

South African cold-chain context

South African cold chains operate under specific pressures: long inland distances from coastal ports to inland customers and the reverse for the export load, ambient temperatures from the Karoo summer to the Highveld winter, intermittent grid power that has put load-shedding-aware genset switching into almost every cold-storage facility, and a customer base that increasingly includes EU and UK importers with their own audit requirements.

The platform handles those realities. Multi-network connectivity covers the long inland routes between coastal packhouses and inland customers, including the citrus run between the Western Cape and the Durban port, the stone-fruit and grape exports from the Hex River valley, the meat distribution loops between the Highveld and the coast, and the seafood corridor between Saldanha and Cape Town markets. Power-loss alerts on cold storage during load shedding give the operator a chance to act before product is lost. Cross-border deliveries into SADC are supported on roaming-enabled hardware. Compliance exports are formatted to satisfy local food safety, pharmaceutical and customer-specific standards, with the regulatory updates baked into the templates.

Frequently asked questions

Talk to our cold-chain team

If your cargo is temperature-sensitive and your customers, your auditors and your insurers all want proof of an unbroken chain, the system you choose is the system your evidence runs on. Book a cold-chain demo and we will walk you through reefer monitoring, cold-room monitoring and the compliance export with your specific cargo and route in mind.