Introduction
The Coeus 4G/WiFi real-time temperature data logger from Freshliance is designed for real-time environmental monitoring in both static and mobile applications. Available in Wi-Fi and 4G versions, these IoT data loggers provide reliable temperature and humidity data with robust alerting, long battery life, and flexible deployment.
Features
24/7 Real-Time Remote Monitoring
COEUS-WIFI real-time data logger connects via WiFi—no SIM card or mobile data plan required. Ensures stable, cost-effective monitoring for indoor environments.
COEUS-4G real-time data recorder automatically uploads data via a built-in 4G SIM card, with no need for Wi-Fi. Direct cellular connection enables seamless setup and real-time tracking, even in mobile or remote environments.
Optional External Probes
Supports two external probes with three optional sensor types:
Temperature & humidity probe: -30℃ to +70℃ / -40℃ to +85℃
Single temperature probe: -30℃ to +70℃
Ultra-low temperature probe: -90℃ to +190℃
Default probe cable length: 2 meters, customizable upon request.
combined with external probe to supply wide temperature monitoring range.
Ideal for cold rooms, incubators, or dry ice applications
Dual Monitoring System: App + Cloud Platform
Real-time access and remote configuration via both mobile app and cloud platform—no need for on-site manual checks
Rechargeable Battery
Equipped with a 2600mAh lithium battery, supports up to 90 days of operation (with 1-hour logging interval). Reliable during power outages.
Data Continuity
Even during WiFi disconnection, data is stored locally and auto-uploaded once the network is restored.
Instant Alerts
Receive SMS, email, and app push notifications via the internet.
Visual + audible alerts on the device: red flashing light + buzzer.
On-Demand Report Export
Supports temporary data export during active operation for compliance checks or quick reviews.
Specifications
Model | COEUS-WiFi | COEUS-4G |
Data Upload Network | WiFi | 4G |
Device Configuration Network | Device AP | 4G |
Maximum Power Consumption | ≤500mA | ≤800mA |
Built-in Sensor | -20℃ ~+ 60℃ ±0.5℃ F.S. |
0~100%RH (Non-condensing) At 25℃ ±2%RH typical ±3%RH (20%~80%RH) ±5%RH (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) |
Screen Dimensions | 85mm*52mm |
Weight | 145g |
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%~90%RH) ±5%RH (Others) |
Standard cable length: 2m; Customizable length available: 5m, 10m, 15m or 20m. |
Application
COEUS series WiFi/4G wireless data logger are mainly used for the temperature and humidity monitoring of cold rooms, especially the fridges and freezers. They 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.
English
Español
Русский
Français
Deutsch
عربي
中文
