Cold Chain Monitoring Solutions: Storage, Transit and Receiving

A cold chain is only as strong as its weakest handover. It helps to split it into three stages, each with its own risk and its own logger: storage (cold rooms, freezers and depots), transit (reefer trucks, vans and shipper boxes) and receiving (the dock where incoming goods are accepted or quarantined). One device rarely suits all three, and choosing per stage is usually cheaper and more reliable than forcing a single model everywhere.

Fixed rooms need an always-on logger with alerts. The 4G MT120 family carries a built-in M2M SIM, so it works in a depot with no Wi-Fi and keeps sending when the site network is down. For ultra-low freezers and liquid nitrogen storage, the MT350 uses a PT100 probe rated from -200°C to +350°C. Where a depot already runs Dixell refrigeration controllers, the CSC50T gateway reads those controllers over Wi-Fi and brings them into the same dashboard without replacing any hardware.

If you own or contract the vehicles, fit a 4G GPS logger such as the MT70, MT120-CN or MTH120-CN. These report temperature and location together, so a dispatcher sees a rising reading and the truck position at the same moment and can act before the load is lost. For shipments that leave your control, such as courier boxes, air freight or third-party trucks, a low-cost single-trip device makes more sense. The UT70 USB logger produces an encrypted PDF report when plugged into any computer, and the BTH70 Bluetooth logger can be read from a phone at the door without opening the box.

The receiving dock is where disputes are settled. A handover report showing the full trip, the minimum and maximum, and any time outside limits lets the stores team accept, reject or quarantine a consignment on evidence rather than on a hand-held reading taken at the tailgate. Keep these reports with the goods receipt note so the record survives the next audit.

Set acceptance rules in advance, for example the maximum cumulative time above 8°C that a product may tolerate according to its stability data, so the dock team is not left to judge each excursion on the spot. The same report, shared with the carrier, also settles who is responsible when a load arrives warm.

Summer ambient temperatures above 40°C, long loading halts, power cuts at depots and patchy coverage on some highways all stress a cold chain. Loggers that buffer readings and resend once the signal returns avoid gaps in the record. For food operators, FSSAI licence conditions expect cold storage and transport temperatures to be maintained and documented; for medicines, Good Distribution Practice expects the same with traceable, tamper-evident records. Reports from Ideabytes loggers are 21 CFR Part 11 compliant and can be exported as PDF, CSV or Excel for either audit.