Coeus-WiFi/4G Real-time Temperature and Humidity Data Logger

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Coeus 4G and WiFi Real-time temperature and humidity loggers are standalone real-time monitoring devices designed for continuous supervision of cold rooms, refrigerators, and freezers. Using WiFi or 4G networks, monitoring data are automatically uploaded to the Freshliance Cloud, allowing users to remotely access real-time and historical data through the cloud platform or mobile app.

With easy installation, independent operation, and optional external probes for ultra-low temperature environments, Coeus real-time data recorder provides reliable long-term monitoring for compliance, quality control, and risk prevention—without the need for additional gateways.

Real-Time Cloud Monitoring

Automatic data upload via WiFi or 4G for continuous, remote visibility.

Gateway-Free Deployment

Standalone operation enables fast installation and easy scalability.

Multi-User Remote Access

View, analyze, and export data anytime via cloud platform or mobile app.

Breakpoint Resume Protection

Data stored locally during network loss and auto-synced once reconnected.

Dual Alarm System

Instant alerts via SMS, email, and app push, with local LED and optional buzzer.

Large Backlit LCD Display

Clear on-site viewing of real-time readings, Min/Max values, and device status.

Rechargeable Battery Design

Built-in battery supports operation while charging for uninterrupted monitoring.

Optional Ultra-Low Temperature Probes

Support up to two external probes, with ranges down to −90 °C for freezers and special storage.

API Integration (Optional)

Supports system integration and secondary development via API.

Multi-Level User Management (Optional)

Role-based access for teams with centralized administrative control.

Model	Coeus-WiFi	Coeus-4G
Data Upload Network	WiFi	4G
Device Configuration Network	Device AP	4G
Maximum Power Consumption	≤500mA	≤800mA
Built-in Sensor	-30℃ ~+ 60℃ ±0.5℃ F.S.
	0~100%RH (Non-condensing) ±3%（25℃，20%~80%RH）；±5%（Others）
External Probes	See the External Probe List
Logging Interval	1min~2d
Uploading Interval	1min~2d
Memory Capacity	120,000 readings, circular buffer
Main Power Supply	USB-Type C, 5V/2A (DC)
Backup Battery	Rechargeable lithium battery, 2600mAh; Max. 60 days (Uploading interval: 15min)
Alarm Mode	Audible and visual alarm
Device Dimensions	109mm(L)33mm(W)80mm(H)
Display	LED & LCD (85mm*52mm)
Weight	175g

External Probe List:

Probe Type	Measuring Range	Measuring Accuracy
Temperature Probe	-30℃~+70℃	±0.5℃ (-30℃~+50℃) ±1.0℃(Others)
Temperature Probe	-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.
Temperature and Humidity Probe	0-100%RH	±3%RH (25℃, 20%~80%RH) ±5%RH (Others)
Standard cable length: 2m; Customizable length available: 5m, 10m, 15m or 20m.

Coeus series 4G/WiFi temperature sensors are mainly used for the temperature and humidity monitoring of cold rooms, especially the fridges and freezers. The fridge/freezer/refrigerator real-time data logger will automatically upload all monitoring data to the cloud via WiFi or 4G network accordingly. Besides, they have a large LCD screen to help users to intuitively view the current temperature and humidity, Max. and Min. temperature and humidity values, date and time, etc.

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.

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Coeus-WiFi/4G Real-time Temperature and Humidity Data Logger

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