A wireless remote temperature monitoring system based on LoRa technology, WHO prequalified (PQS code: E006/075) and actively procured by UNICEF for global immunization programs. The U-COOL-LoRa consists of collector nodes (sensors) and a smart gateway that continuously and autonomously transmit temperature data to the UCool EMS remote platform — with no network cabling or power supply required at sensor installation points.

LoRa communication operates in the sub-1 GHz band (433 MHz), using spread spectrum modulation for long-range transmission, strong penetration through obstacles and walls, and high anti-interference performance. This eliminates the need for cable infrastructure and enables flexible user-installed deployment in hard-to-reach environments such as cold rooms, warehouses, and distribution centers. The smart gateway includes a standby battery that maintains operation during external power failures, and the entire system supports breakpoint continued transmission to prevent data loss during any network disruption.

The external digital sensor with a 2 m cable (standard model YB-HC600-01) measures temperature from −40°C to +80°C. The collector unit features an LCD screen with real-time data display and triggers a local audio-visual alarm when temperature exceeds user-configured thresholds — or when a collector node stops working normally. Each unit stores up to 60,000 data sets locally, with breakpoint transmission ensuring record continuity in case of signal failure.

The probe uses a pluggable aviation plug connector: the sensor can be inserted through a refrigerator porthole or distributed throughout a cold room, while the collector body remains independently accessible and removable. If the probe is damaged, it can be replaced separately without replacing the entire collector. The standard Micro-USB interface enables local data export, firmware upgrades, and system parameter configuration via PC software.

Technical Specifications

Key Features

• WHO PQS prequalification (code E006/075) and direct procurement by UNICEF

• LoRa sub-1 GHz (433 MHz) communication: long range, obstacle penetration, anti-interference

• Smart gateway with standby battery and full breakpoint continued transmission support

• Battery-powered collector nodes (3.6 V / 5,400 mAh) with over 1-year operating life

• LCD display with real-time readings and user-configurable local audio-visual alarm

• Local storage of 60,000 data sets with breakpoint transmission for uninterrupted records

• Pluggable aviation plug connector: probe individually replaceable without replacing the collector

• Micro-USB interface for local data export, firmware updates, and system configuration

• Wire-free installation: no additional network or power cabling required

• Temperature range −40°C to +80°C with 0.1°C precision and ±0.5°C accuracy

Applications

The U-COOL-LoRa is designed for cold rooms, distribution warehouses, refrigerated trucks, pharmacies, clinical laboratories, blood banks, immunization centers, and national vaccination programs requiring continuous wireless remote monitoring of multiple storage points without cabling infrastructure. LoRa technology makes it especially effective in large-scale facilities with physical barriers — thick walls, metal partitions — where other wireless protocols fall short.

The system is particularly well suited for public health operations in developing countries and low-infrastructure settings, where WHO and UNICEF recommend it as the reference solution for maintaining and documenting the cold chain of vaccines and immunobiological products.