Cold Chain Monitoring System in Pakistan
The chain is only as strong as the hour nobody was watching — usually overnight, usually in a cold room.
VouchTrack monitors temperature across the whole chain, not just the vehicle: reefer trucks, refrigerated containers, cold rooms and warehouse zones. Probes report continuously at ±0.5°C, breaches alert by SMS, push and email with a grace window, and every period produces an audit-ready export.
Sensor, network, dashboard
The sensor reports over the mobile network to the same platform that runs our vehicle tracking, so this sits alongside your fleet rather than in a separate system with a separate login.
- One dashboard for vehicles, sites and sensors
- Alerts by app, SMS, WhatsApp and email
- Scheduled reports and a documented REST API
- Installed and supported by our own technicians
How cold chain monitoring actually works
A cold chain is only unbroken if you can prove it was unbroken. That proof is built in four stages, and each one is a place where most installations go wrong.
Scroll the diagram sideways to follow all four stages.
Probe placed in the airflow, not on the wall
A stainless steel probe sits in the return air path where the product actually is. Mounted on the wall it reads the wall; mounted near the door it reads the dock every time the door opens. On a multi-compartment body each zone gets its own probe, because a chiller compartment and a frozen compartment are two different promises to two different clients.
±0.3 °C accuracy · −40 °C to +80 °C · reading every 60 s
Readings leave the vehicle, or wait until they can
The device holds a multi-network SIM, so it moves between operators rather than going dark where one has no mast. Where there is genuinely no coverage — and on the Sukkur and Quetta routes there still is not — readings are written to on-board memory and uploaded in full when signal returns. The chart has no gap, which is what an auditor is actually looking for.
Store-and-forward · multi-network SIM · 30-day on-board buffer
The platform decides what counts as a breach
You set the limit and the grace window together. A frozen load at −18 °C with a fifteen-minute window means a legitimate door opening at a delivery stop does not page anyone at 2 a.m., while a failing compressor does. Door-open events and temperature are read together, so the system can tell the difference between the two.
Per-zone limits · grace window · door events correlated
The alert reaches whoever can act on it
The driver gets it in the cab, the dispatcher on the app, and — where the contract requires it — your client’s quality contact by email. Each on the channel they actually read. Behind the alert sits the exportable record: a time-stamped temperature log for the consignment, in a format a pharmaceutical or food-safety auditor accepts without argument.
App · SMS · WhatsApp · email · signed PDF and CSV export
What you actually get
Vehicles and fixed sites on one screen
A reefer on the road and a cold room in the warehouse appear in the same dashboard, so a handover gap is visible rather than inferred.
Multi-compartment and multi-zone
Up to four probes per vehicle body, and as many zones as a cold store needs, each with its own thresholds.
Humidity where it matters
For pharmaceutical and produce storage, humidity is logged alongside temperature on the same device.
Alerts with a grace window
A door opening during loading should not trigger an alarm. Thresholds carry a configurable tolerance so alerts stay meaningful.
Exports your client\u2019s auditor accepts
A per-period PDF or CSV with the complete trace, timestamps and any excursions marked.
Power-failure alerts
If a cold room loses power, you hear about it immediately rather than discovering it at opening time.
Numbers, not just a live reading
A live value tells you the moment. The reports tell you the trend, which is what a budget conversation actually needs — scheduled to your inbox and exportable to Excel, CSV or PDF.
See the reportingThe difference it makes
Each of these is an outcome plus the mechanism that produces it, because a benefit without a mechanism is just a claim.
Rejected consignments you cannot explain
A rejected load without a temperature record is a total loss and an argument you will lose. With one, you either prove the chain held or you know exactly which leg broke it.
How: Continuous logging plus door-event correlationFrom breach to someone knowing
Not at the end of the trip when the load is already warm. The grace window is deliberate — long enough to ignore a dock door, short enough to save a compressor failure.
How: Threshold with grace window, alert routed by roleRecords your client’s QA will accept
Pharma distribution and organised food retail both ask for the log before they ask for the price. Having it as an export rather than a promise shortens the tender conversation.
How: Per-consignment PDF and CSV, retained for the contract periodMulti-compartment bodies handled properly
One truck carrying frozen and chilled at once is two different commitments. A single average across the body satisfies neither.
How: Independent probe, limit and alert chain per compartmentCold rooms on the same screen
The warehouse cold room, the retail chiller and the vehicle are one continuous chain. Monitoring them in three separate systems is how gaps survive.
How: Same platform for mobile and fixed assetsLoad-shedding does not become a blind spot
A mains failure at a cold room is itself the alert. The device runs on its own cell and reports the outage rather than simply going quiet.
How: Battery-backed device, power-failure eventFigures shown are typical of what operators report rather than a guarantee. What your fleet recovers depends on where you are starting from — we would rather set the expectation honestly than win the order and miss it.
The technical detail
The questions a technical evaluator asks before a commercial one does. If something you need is not here, ask — we will answer it rather than route you to a brochure.
| What is measured | Temperature per zone, humidity where required, door open/close, position, and mains power state at fixed sites. |
|---|---|
| Sensor type | Stainless steel digital probe (wired) or wireless zone sensor where a body cannot be drilled. |
| Accuracy | ±0.3 °C typical across −40 °C to +80 °C; humidity ±3% RH where fitted. |
| Reading interval | 60 seconds by default, configurable down to 15 seconds for validation runs. |
| Connectivity | Multi-network GSM SIM with automatic operator selection; on-board buffering when out of coverage. |
| Power | Vehicle supply with internal backup; mains with battery backup at fixed sites. |
| Outputs | Live dashboard, app, SMS, WhatsApp, email alerts; scheduled PDF and CSV reports; REST API. |
| Installation | By our own technicians. A reefer body is typically done in half a day without breaking the insulation envelope. |
Before you commit
The things people ask us on the first call about this solution.
Ask a questionA reefer on the road and a cold room in the warehouse appear in the same dashboard, so a handover gap is visible rather than inferred.
Up to four probes per vehicle body, and as many zones as a cold store needs, each with its own thresholds.
For pharmaceutical and produce storage, humidity is logged alongside temperature on the same device.
A door opening during loading should not trigger an alarm. Thresholds carry a configurable tolerance so alerts stay meaningful.
A per-period PDF or CSV with the complete trace, timestamps and any excursions marked.