Overview
Overview
SGT Cold Chain Sensor is a continuous temperature, humidity and door-event monitor for reefer trucks, cold rooms, pharmaceutical fridges and walk-in freezers — with HACCP / GDP compliance reports, real-time excursion alerts, and a tamper-evident audit log.
Built for food, pharma and vaccine logistics where a 30-minute temperature excursion can spoil an entire load. The sensor mounts in 5 minutes (magnetic or screw), runs 2-5 years on battery, and streams over LTE-M / NB-IoT to a compliance dashboard.
- Continuous temp + humidity — ±0.5 °C, ±3% RH, 30 s sampling
- Door open events — magnetic reed sensor, duration logged for compliance
- HACCP & GDP reports — signed, time-stamped PDF on demand
- Excursion alerts — push / SMS in seconds; pre-event clip via paired dashcam
How It Works
- Sense — temperature, humidity and door-switch readings every 30 s, multi-zone optional.
- Decide — edge rules flag excursions (e.g.,
IF T > -15 °C for > 2 min → alert) and door-open events > 3 minutes. - Stream — readings sent over LTE-M / NB-IoT (low power, high penetration); offline buffering for 7+ days.
- Report — cloud builds 24 h / 7 d / monthly compliance charts with thresholds, excursions highlighted, signed PDF for HACCP / GDP audit.
Features
- Multi-zone sensing — 1-8 temperature probes per gateway (front, middle, back of reefer)
- Door event log — open time, duration, count per shift; correlates with temp excursion
- Compliance PDF — HACCP, GDP, FDA 21 CFR 11, EUDAMED-ready
- Pre-cool verification — confirms reefer reached set-point before loading
- AI spoilage risk — predicts shelf-life impact from excursion duration + intensity
- Tamper-evident log — hash-chained, signed, immutable cloud storage
- Multi-channel alerts — push, SMS, IVR, webhook to TMS / WMS
- Pair with GPS tracker — temperature overlaid on route map for end-to-end traceability
Use Cases
- Reefer trucks — frozen, chilled and pharma loads with route-level temperature traces
- Cold rooms / walk-in freezers — restaurants, super-markets, dark stores
- Pharma & vaccine cold chain — strict -20 °C / 2-8 °C bands, audit-grade history
- Bakery proofers & ovens — high-side temperature control with humidity
- Lab fridges & ULT freezers — sample integrity, alarm escalation
- Last-mile insulated bags — small-form-factor BLE logger variant
Specifications
- Temperature: -40 to +85 °C, ±0.5 °C (±0.3 °C calibrated variant)
- Humidity: 0-100% RH, ±3% RH
- Door switch: Magnetic reed, gap < 18 mm
- Sampling: 30 s default, 5 s - 5 min configurable; event-driven push on excursion
- Connectivity: LTE-M / NB-IoT (primary), LoRaWAN (alt), BLE for logger variant
- Battery: 3.6 V Li-SOCl₂, 2-5 yr typical at 30 s sampling
- Storage: 90 days at 30 s offline buffer
- Compliance: EN 12830, FDA 21 CFR 11, HACCP, GDP (EU GDP Annex 11), WHO PQS
Product information
| Product name | Cold Chain Sensor |
|---|---|
| Category | Fleet & Transportation |
| Type | IoT Based Product |
| Procurement | Contact / Negotiable |
Customisation options
- Sensor mix — temp only, temp + humidity, temp + humidity + door, plus optional CO2 / shock / tilt
- Probe count — 1 probe (small fridge), 3 probes (reefer front/mid/rear), 8 probes (warehouse)
- Connectivity — LTE-M / NB-IoT, LoRaWAN, BLE logger; on-prem or cloud
- Calibration — factory calibrated, NABL / NIST-traceable certificate, field re-cal kit
- Compliance pack — HACCP food, GDP pharma, FDA 21 CFR 11, WHO PQS vaccine
- Alert channels — dashboard, email, SMS, IVR call, push, webhook to TMS / WMS
- Pair with tracker — standalone, paired with SGT GPS Fleet Tracker, or third-party telematics
- White-label option — your branding on device, dashboard, PDF reports
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.