What
Intermittent gaps are the hardest thing to diagnose in cold chain monitoring, because everything can look healthy on the dashboard while a refrigerated trailer drifts out of range. The goal here is not to guess. It is to classify the gaps by pattern, test one layer at a time, and only then decide whether to tune, reconfigure, redesign, or replace. Start with the evidence you already have. Pull thirty days of telemetry and mark every gap with its timestamp, duration, and location. Most gaps fall into three recognizable shapes. A gap that lands during a reefer cycle, right when the compressor kicks on or off, points toward sensor hardware. A gap that clusters at loading docks, cold storage doors, or dense urban corridors points toward signal shielding and latency. A gap that appears at random but repeats at a consistent duration, say every forty to ninety seconds, usually points toward how data is being ingested and processed rather than how it is being captured. That third shape is the one people miss. Next, isolate the temperature sensors. Consumer-grade Bluetooth sensors may disconnect when the reefer unit cycles, and when that happens the compliance logs often show a flat line instead of a dropout. A flat line is worse than an obvious gap, because it hides a rising temperature trend behind data that looks perfectly safe. Check whether your sensor logs show reconnect events, battery drops, or sudden flat segments at the exact moment refrigeration cycles. If they do, you have a hardware or placement problem, not a platform problem. Then test shielding. Refrigerated trailer walls are metal, and cold storage facilities are essentially buildings designed to block what is outside them. GPS signal delay inside cold storage facilities can create data gaps of up to five minutes. Park a unit next to a dock, keep it stationary, and watch the timestamps. If the gap widens with each minute inside the building and closes as soon as the truck rolls out, that is environmental, not equipment failure. The fix is often sensor placement away from vents and a receiver mounted where it can see sky through the trailer. Only after you clear those two layers should you look at architecture. Ask simple questions. Does your fleet management software ingest vehicle telematics as a continuous stream, or does it batch updates? Are geofence alerts generated at the edge or after a central round trip? If alerts consistently arrive late even when the raw data shows no gaps, the delay lives in the processing chain, and no amount of sensor rearranging will fix it. The decision path follows the diagnosis. Move sensors first if hardware is the cause. Adjust geofence thresholds and zone definitions second if alerts misfire near cold storage boundaries. Redesign the data flow if raw telemetry is clean but alerts lag. Replace the cold chain monitoring platform only when gaps, delayed alerts, and incomplete compliance logs survive all three fixes. A practical threshold many fleets use is cargo value per trip. Once that number climbs past roughly ten thousand dollars, internal workarounds stop being defensible, because a single missed spike costs more than the platform change. GPS Controller focuses on closing exactly that loop, connecting tracking, telematics, and temperature reporting so gaps are visible instead of hidden. Run the tests before the budget conversation. You will either fix the problem cheaply or walk into the purchase knowing exactly what you need. Either outcome beats another flat line on an audit report.Related FAQs: How can I tell if my ship's GPS is being jammed?