Coeus Mini Real-Time Temperature Humidity Data Logger
Wi-Fi / 4G / LAN connectivity options
High-accuracy sensing (±0.5℃) with optional external probe
Real-time alerts via SMS, Email and App Push
API-ready for IoT solution integration







Wi-Fi / 4G / LAN connectivity options
High-accuracy sensing (±0.5℃) with optional external probe
Real-time alerts via SMS, Email and App Push
API-ready for IoT solution integration
IntroductionThe Coeus Mini Series is a compact real-time temperature humidity data logger designed for reliable environmental monitoring in critical indoor facilities. With flexible connectivity options including Wi-Fi, 4G, and LAN, the device automatically uploads monitoring data to the cloud for remote access and real-time visibility.
Ideal for environments such as freezers and refrigerators, laboratories, pharmacies, warehouses, and server rooms, the Coeus Mini wireless data logger provides instant alert notifications, on-site audible and visual alarms, and API-based system integration, helping ensure stable environmental conditions and efficient facility management.
Model | Coeus Mini |
Data Upload Network | WiFi / 4G / LAN |
Built-in Sensor | -20℃ ~ +60℃; ±0.5℃(F.S.) |
0~100%RH, ±3%RH(25℃, 20%~80%RH); ±5%RH(Others) | |
External Probe | Max. one external probe optional (See External Probe List) |
Logging Interval | 1 minute ~ 2 days |
Memory Capacity | 120,000 readings, circular buffer |
Uploading Interval | 1 minute ~ 2 days |
Main Power Supply | USB-Type C, 5V/2A(DC) |
Backup Power | 3×AA battery (Not Included) |
Backup Power Duration | Up to 1 month (10-min upload interval ) |
Display | LED & LCD(62mm*33mm) |
Installations | Fix with screws / Wall mounting |
Dimensions | 93mm*63mm*30.2mm |
Weight | Approx. 100g (Device only) |
External Probe List:
Probe Type | Measuring Range | Measuring Accuracy |
Temperature Probe | -30℃~+70℃ | ±0.5℃ (-30℃~+50℃) ±1.0℃(Others) |
-90℃~+200℃ | ±0.3℃ (-40℃~+100℃) ±0.5℃ (-80℃~-40℃; +100℃~+150℃) ±1.0℃ (Others) | |
Temperature and Humidity Probe | -40℃~+85℃ | ±0.5℃ F.S. |
0-100%RH | ±3%RH (25℃, 20%~80%RH) ±5%RH (Others) | |
Standard cable length: 2m; Customizable length available: 5m, 10m, 15m or 20m. | ||
Features

Wi-Fi / 4G / LAN Connectivity Options
Available in three dedicated hardware versions—Wi-Fi, 4G, or LAN connectivity. This allows users to select the most reliable transmission method based on their specific site conditions, whether it's utilizing existing facility networks or bypassing IT infrastructure with a cellular (4G) solution to avoid coverage gaps.

API-ready for Diversified IoT Solutions Integration
Engineered for maximum compatibility. Seamlessly push real-time data directly to your own local servers, private clouds, or existing enterprise platforms such as ERP, WMS, and third-party IoT management systems. This ensures centralized data control and empowers you to build customized monitoring workflows within your preferred software architecture.

High-accuracy Sensing (±0.5℃) with One Optional External Probe
Max. 2 monitoring channels, available in three probe configurations to match your specific storage needs:
Standard (-30℃ to +70℃): Ideal for general cold storage, warehouses, and ambient monitoring.
Ultra-Low (-90℃ to +200℃): Designed for dry ice, liquid nitrogen storage, and industrial use.
Temperature&Humidity (-40℃ to +85℃ / 0-100%RH): Perfect for pharmaceutical, warehouse, and cold room environments.

Continuous Power with 3×AA Battery Backup
External power adapter supports continuous operation. The three AA batteries provide backup power during emergency power interruptions.

Real-time Alerts via SMS, Email, and App Push
Provides an instantaneous safety net. Get notified immediately from “Freshlink” when temperature or humidity deviates from preset thresholds, enabling proactive risk mitigation and ensuring the safety of your inventory 24/7.
Application
The Coeus Mini real-time data logger is suitable for automated environmental monitoring.
1. Medical & Life Sciences
Ultra-Low Temperature Storage: Reliable 24/7 monitoring for -80°C freezers, liquid nitrogen tanks, and biological specimen banks using external probes.
Laboratory Environments: Precise tracking for incubators, clean rooms, and stability chambers to ensure experimental integrity and GSP/GMP compliance.
Hospital Pharmacy: Automated temperature safety net for vaccine storage and medicine cabinets, with instant alerts to prevent spoilage.
2. IT Infrastructure & Critical Facilities
Data Centers & Server Rooms: Monitoring ambient temperature and humidity to prevent hardware overheating and costly downtime in high-density server racks.
Network Closets & Base Stations: Remote environmental management for distributed unattended IT rooms and telecom base stations via 4G or LAN options.
3. Industrial & Specialized Storage
Automated Warehouses: Seamless data integration for large-scale climate-controlled warehouses, eliminating manual checks through API-driven automated reporting.
Industrial Production: Monitoring sensitive manufacturing areas where specific humidity levels are critical for product quality and material stability.

FreshLink
(Android & iOS supported)
FreshLink is a mobile APP designed for Freshliance’s real time temperature monitoring solutions with the gateways, and WiFi devices, etc. It is compatible with Android and iOS systems, and is composed of five pages: Home, Manage, Group, Alarm and Download, respectively for device status, real-time and historical data, usage records, device groups, data alarms, and data reports, etc. Using this APP, users can wirelessly configure and control the gateways, and WiFi devices, etc, as well as realize remote data tracking, filtration, analysis, and export in real time.
It works with the temperature monitoring solutions based on the gateways, and WiFi devices, etc.
Not sure which model is suitable for your application? Send us your requirements—we will recommend the best solution.
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