Overview
Overview
Reefer Monitoring System is a wireless telemetry & alarm platform for refrigerated containers in port yards, on vessels and on the road. It plugs into the reefer machinery interface (or attaches as a standalone IoT gateway), streams setpoint, supply and return temperatures, defrost cycles and power events to the cloud, and pages reefer technicians the moment anything drifts.
Built for ocean carriers, port operators, 3PLs and pharma cold-chain shippers that need audit-grade cold-chain evidence, faster response to power-loss events, and a single dashboard across hundreds of boxes regardless of make (Carrier, Thermo King, Daikin, Star Cool).
- OEM-agnostic — reads Carrier, Thermo King, Daikin, Star Cool via Reefer PIN / Modbus
- Setpoint vs actual — minute-by-minute audit trail retained 7 years
- Power-loss alarms — SMS dispatcher within seconds of plug-out
- Defrost intelligence — tracks frequency, duration, and adaptive scheduling
How It Works
- Reefer container — the IoT gateway connects to the chiller via Reefer PIN, Modbus or a clamp-on probe set. It reads setpoint, supply, return, defrost state, compressor run-time, and door status. A local LCD echoes the readings.
- Refrigeration logic — an edge state-machine tracks the COOLING / IDLE / DEFROST / ALARM cycle, runs threshold rules (Δ supply > 2 °C, power loss, door open > 5 min) and fires local alarms even when WAN is down.
- Cold-chain cloud — ingests every event, plots fleet temperature distribution, computes SLA compliance, and runs AI drift detection for slow-failing units.
- Reefer tech pages — on-shift technicians get push, SMS, email and yard-radio alerts with block / row / tier location and a one-tap GO button that updates the yard map.
The purple feedback loop carries acknowledgements, remote setpoint changes and defrost overrides back down to each reefer.
Features
- Reefer PIN interface — ISO 10368 compliant connector, no chiller modification needed
- Power-event logging — plug-in / plug-out / brown-out events with timestamps
- Adaptive defrost — tracks defrost duration to flag iced-coil units before they fail
- Door-open monitoring — cargo loss prevention with geofence-aware threshold
- Cold-chain compliance — GDP, EU GDP, USP<1079>, IATA TCR audit reports
- Fleet heatmap — spot iced coils, hot zones, and underperforming chillers at a glance
- Pre-trip inspection (PTI) — automated checklist with go / no-go flag
- API + EDI — REST, MQTT, EDI 315 / 322 for TMS & carrier systems
Use Cases
- Port reefer yards — monitor 100-1000+ boxes with a single dashboard
- Ocean carriers — on-vessel monitoring with satellite back-haul
- Pharma cold-chain — GDP-grade evidence for vaccines and biologics
- Seafood & meat exporters — -25 °C / -18 °C compliance evidence per shipment
- Banana / produce trades — CO₂ trend, ethylene control, ripening profiles
- Pre-trip inspection (PTI) shops — automated PTI with pass / fail report
Specifications
- Interfaces: Reefer PIN (ISO 10368), Modbus RTU/TCP, clamp-on PT100 probes
- Sensors: Setpoint, supply, return, ambient, CO₂ (optional), humidity, door, power, compressor
- Sampling: 30-second default, 5-second on alarm, 1-minute long-term archive
- Connectivity: LTE-M / 4G, Wi-Fi, optional Iridium SBD at sea
- Power: 24-110 VDC from chiller bus + 30-day internal battery during plug-out
- Enclosure: IP66, -40 to +85 °C, salt-spray ASTM B117
- Retention: 7-year audit-grade time-series, immutable cold-chain ledger
- Standards: WHO GDP, EU GDP, USP<1079>, IATA TCR, IEC 62443 cyber
Product information
| Product name | Reefer Monitoring System |
|---|---|
| Category | Port & Logistics |
| Type | IoT Based Product |
| Procurement | Contact / Negotiable |
Customisation options
- Interface — Reefer PIN (ISO 10368), Modbus RTU/TCP, or clamp-on probe kit for legacy units
- OEM support — Carrier, Thermo King, Daikin, Star Cool, MCI — multi-vendor or single-make tuning
- Connectivity — LTE-M, NB-IoT, Wi-Fi, LoRaWAN (yard), Iridium SBD (at sea), or hybrid
- Sensor add-ons — CO₂, ethylene, humidity, ambient, door, GPS, shock
- Compliance pack — WHO GDP, EU GDP, USP<1079>, IATA TCR, FDA 21 CFR 11 audit profile
- Cloud tier — multi-tenant SaaS, dedicated tenant, or on-prem appliance
- Integrations — Navis N4, SAP TM, Oracle OTM, INTTRA, CargoWise, custom EDI/REST
- Service plan — 24/7 reefer-tech hotline, on-site SLA engineer, PTI shop add-on
Ordering & lead time
Standard lead time depends on current stock. For volume orders, please contact our team for a structured quote including BOQ, freight, installation and warranty terms.
Support
Engineering support, installation guidance and warranty claims are handled by our customer success team. Reach us at support@sgtsystems.com or via the channels listed on our Contact page.