Solutions
Cold chain · Vehicle telematics
4G Vehicle Temperature Monitor
Wide-input cellular logger for refrigerated trucks, vans, and last-mile cold chain.
Probes
Up to 4
Accuracy
±0.3°C
Input range
9–60V DC
Target BOM
$28–$42
01 / Where it ships
Multi-probe temperature, humidity, and door telemetry over 4G with audible & SMS alerts.
01
Refrigerated last-mile
Vans delivering ice-cream and pharma get continuous in-cabin readings, mapped to GPS and time.
02
HGV reefer fleets
Long-haul reefers report door-open / temperature breach events in real time to a fleet dashboard.
03
Vaccine & blood transport
Pharma logistics gets an audit trail meeting EU GDP / FDA 21 CFR Part 11 storage expectations.
02 / System architecture
Sensors, MCU, and connectivity — co-designed end-to-end.
Architecture · block diagramReference
BLOCK-307RYXAVO · REV-A
03 / Key selections
Production-grade parts. Not a generic reference board.
| Area | Recommended |
|---|---|
| Cellular | Quectel EC800M-EU / -NA |
| MCU | STM32L431 |
| Temperature | NTC 10k 1% or PT1000 (selectable) |
| Storage | 16 Mb SPI Flash + microSD |
| Antenna | External LTE + GNSS combo |
04 / Specifications
Detailed specifications.
Cellular
4G LTE Cat.1 bis (B1/3/5/7/8/20/28)
Positioning
GPS + GLONASS + Galileo + BeiDou
Temperature range
-30°C to +70°C @ ±0.3°C
Humidity
0–100% RH @ ±2%
Input voltage
9–60V DC, reverse-polarity protected
Operating temp
-40°C to +85°C
Enclosure
ABS+PC, IP54, panel-mount option
Dimensions
104 × 64 × 22 mm
05 / Customization
Fork the design. We tailor it.
Anything below can be configured per program. Tell us what changes and we'll come back with a delta BOM and timeline.
- Enclosure color, logo, label
- Mobile / Web fleet dashboard (white-label)
- Audible buzzer + ext. relay output
- CAN bus tap (J1939) for engine telemetry
- Driver smartphone BLE companion app
- Custom probe count (2 / 4 / 6 channels)
06 / MOQ & lead time
Production terms.
- MOQ
- 500 units
- Sample lead time
- 10 working days
- Mass production
- 30–35 days from PO
- Payment terms
- 30% T/T deposit, 70% before shipment
07 / Certifications
Compliance scope.
- CE
- FCC
- E-mark
- PTCRB
- RoHS
- REACH
- IP54 (enclosure)