ReeferGas DetectionTerminal
A multi-parameter detection terminal installed inside refrigerated containers. It monitors ethylene, CO₂, temperature, and humidity in real time, comprehensively assessing the ripeness and transport environment of ethylene-sensitive fruits such as durian — turning "find out it's spoiled only at port opening" into "visible, alertable, and actionable in transit".
Product Overview
An intelligent gas monitoring terminal designed for sea/land transport of ethylene-sensitive fruits (such as durian). It pairs with the reefer terminal via Bluetooth and uploads data through 4G or LEO satellite to the ucontainers platform.
Core Pain Points
- Durian continuously releases ethylene in transit, accelerating ripening
- Lack of timely intervention leads to batch spoilage
- Spoilage risk cannot be assessed before port opening
- Long sea voyages amplify and accumulate spoilage risk
Product Value
- From "find out at port opening" to "visible in transit"
- From "passively accepting losses" to "early warning"
- From "post-opening accountability" to "in-transit intervention"
- Per-batch data is queryable and traceable, with full-chain records
System Architecture
A four-layer end-to-end data transmission link, from inside the container to the user's phone.
Detection Terminal
Installed inside the reefer, collects ethylene, CO₂, temperature and humidity data
Reefer Terminal
Receives Bluetooth broadcast data, relays via 4G or LEO satellite
ucontainers Platform
Data storage, analytics, threshold alerts, mobile visualization
User Mobile
View data in real time, receive alerts, remote intervention
Core Features
From ethylene concentration to local storage, eight capabilities covering the full scenario of cold chain gas monitoring.
Ethylene Detection
0~100 ppm range, accurately captures fruit/vegetable ripeness changes and provides early warning of over-ripening.
CO₂ Detection
380~32,000 ppm, helps assess fruit respiration intensity and verify reefer sealing and ventilation.
Temperature Detection
-40~85°C, accuracy ±0.5°C, ensures full compliance and traceability of reefer transport environment.
Humidity Detection
0~100% RH, accuracy ±3% RH, prevents condensation or excessive dryness from damaging cargo.
Local Storage
Circular storage of 60 days of detection data (about 43KB Flash), no data loss during network outages.
Bluetooth Transmission
Built-in PA amplifier for stable transmission to the reefer terminal or phone — no wiring required.
Ultra-Low Power
Detection interval > 20 minutes (configurable), single-use lithium battery lasts > 3 years.
Status Indication
Three-color LED intuitively displays power on/off, battery level, clock initialization, and other device statuses.
Technical Specifications
Sensor configuration and device parameters define the hard metrics for industrial-grade cold chain gas monitoring.
Sensor Configuration
| Item | Range / Accuracy | Operating Temp |
| Ethylene C₂H₄ | 0 ~ 100 ppm | -20°C ~ 60°C |
| Carbon Dioxide CO₂ | 380 ~ 32,000 ppm | 10°C ~ 50°C |
| Temperature | -40 ~ 85°C, ±0.5°C | — |
| Humidity | 0% ~ 100% RH, ±3% RH | — |
Device Parameters
| Detection Interval | > 20 minutes (configurable) | |
| Local Storage | 60-day circular storage (about 43KB Flash) | |
| Communication | Bluetooth + PA (PATX / PARX) | |
| Clock | RTC with long-life power, factory-initialized, independent of power switch | |
| Power Supply | Single-use lithium battery CR17450 × 2 (2500mAh × 2) | |
| Service Life | > 3 years | |
| Operating Temp | -10°C ~ 60°C | |
| Main MCU | TLSR8258 (17 / 32 GPIO) | |
| Physical Switch | Supported (turns off all circuits except RTC) | |
| Status Indication | Green (power on/off), Red (low battery), Yellow (clock not initialized) | |
Product Advantages
From precise early warning to global coverage, five advantages safeguard every reefer of perishable cargo.
Precise Alerts
Combined assessment of ethylene + CO₂ + temperature + humidity, effectively reducing false positives from any single metric.
Full Traceability
60-day local storage + cloud sync. Every batch of data is queryable, traceable, and auditable.
Global Coverage
Dual channels of 4G + LEO satellite, ensuring normal data relay even in signal-dead sea areas.
Long Battery Life
> 3 years service life, covering multiple round-trip transports with maintenance-free operation.
Easy Installation
Plug-and-play inside the reefer, with auto Bluetooth pairing — no extra wiring or manual setup.
Make Every Durian Reefer "Visible"
boxlog Reefer Gas Detection Terminal — ucontainers' next-generation smart cold chain monitoring product. Open for collaboration now.
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