
WiFi/4G connection for device configuration and data transfer
View and analyze the recorded data in real time using cloud platform and mobile APP, including immediate graphing, summarization and analysis, etc.
Continue to record data during network failure, and breakpoint resume after network recovery
Smart alarm via SMS, emails, APP push, computer platform
Local alarm via LED indicators and a buzzer
Large-capacity rechargeable battery
Up to two external probes optional for ultra-low temperature monitoring, -90ºC
±0.5ºC, high temperature accuracy
Model | COEUS-WiFi | COEUS-4G |
Data Upload Network | WiFi | 4G |
Device Configuration Network | Device AP | 4G |
Maximum Power Consumption | ≤ 126mA | ≤ 150mA |
Built-in Sensor | -20ºC ~+ 50ºC ±0.5ºC F.S. | |
5% ~ 95% (Without condensation) ±3%RH (25ºC, 20%~90%RH) ±5%RH (Other) | ||
Battery | Rechargeable lithium battery | |
Power Port | USB-Type C | |
Power Input | 5V/2A (DC) | |
Charging Time | About 3.5 hours | |
Power Consumption in Operation | ≤ 150uA | |
Display | LCD | |
Alarm Mode | Audible and visual alarm | |
Standby Time | Max. 90 days (uploading interval: one hour) | |
Device Dimensions | 109mm(L)*33mm(W)*80mm(H) | |
Screen Dimensions | 85mm*52mm | |
Weight | 145g |
Optional External Probes (Flexible ultra thin cable optional, 0.3mm thick and 7.5mm wide) | |
External Temperature and Humidity Probe | -40ºC ~+85ºC ±0.5ºC F.S. |
±3.0%RH (25ºC, 20%~90%RH) ±5%RH (Other) | |
External NTC Temperature Probe | -30ºC ~+70ºC ±0.5ºC (-30ºC~+50ºC) ±1ºC (+50ºC~+70ºC) |
External Digital Temperature Probe | -90ºC ~+ 200ºC ±0.3ºC (-40ºC~+100ºC) ±0.5ºC (-80ºC~-40ºC; +100ºC~+150ºC) ±1ºC (Other) |


Features
et and update settings remotely
These real time data loggers can be easily configured and reconfigured with the APP FreshLink, and even the computer platform, including logging interval, upload interval, alarm settings, and alarm notifications, etc.
Data transmission to the Cloud via WIFI/4G, and data review by APP and computer platform
These data loggers monitor data as configured and transfer the data to the Freshliance Cloud via WiFi or 4G network accordingly. All data are accessible via the APP and the computer platform, with data graphing, statistics, analysis, and processing.
Persistent caching during offline mode, and data re-upload after network recovery
These data loggers support 24/7 data monitoring and uploading as configured, and allow the data to be cached on the main device during offline mode and re-uploaded after network restoration, so as to ensure the data integrity.
Large LCD screen with backlight for intuitive display
An LCD screen, 85mm*52mm, is designed to intuitively display current temperature and humidity, Max./Min. temperature and humidity, date and time, battery level and communication status, etc.
Rechargeable Battery
These data loggers are designed with a built-in rechargeable lithium battery of 2600mAh, which can be available while charging, so as to ensure the long-term stability of data monitoring.
Instant, Real-time Alarms
Up to 6 alarm points can be set. When the preset thresholds are exceeded, alarm notifications will be sent via SMS, email and APP push remotely, as well as locally via flashing red indicator and the buzzer on the main device.
Multiple installation modes: Stand on end, hanging, etc.
These data loggers can be flexibly installed or placed anywhere according to the actual monitoring environment.
External probes (flexible ultra thin cable optional)
To meet the specific application requirements, especially the ultra-low temperature monitoring, up to two external probes can be optionally applied, with the temperature down to -90ºC. Flexible ultra thin cable, 0.3mm thick and 7.5mm wide, can also be selected for the data monitoring of fridges, freezers, to ensure higher sealing performance.


Application
The COEUSS-WIFI wireless data logger is the perfect solution for precise indoor temperature and humidity monitoring across various settings including laboratories, pharmacies, fruit & vegetable warehouses, wine cellars, food supermarkets, flower shops, and baby rooms. Leveraging advanced IOT technology, the COEUSS-WIFI seamlessly uploads all collected data to the cloud. In addition, its large LCD screen aids users in easily viewing current temperature and humidity, Max. and Min. values, date, time, and other crucial information..


Freshliance Electronics Co., Ltd, founded in 2015, is an ISO9000-certified enterprise, located in Hengfengkechuang Center, Zhengzhou Airport Economy Zone, China. Our company specializes in the field temperature and humidity data loggers, and environmental monitoring IOT systems for warehousing, shipping and other cold chain processes in different industries like the fruits and vegetables, food processing, seafood, life science, pharmaceutical, and logistics.
We have a professional and innovative R&D team for hardware and software. All of our products are designed and produced based on customer needs and requirements. And our IOT platform based on WIFI and 4G/5G communications with sensors equipped with Bluetooth, Lora, or RF, can provide the solution you expect.
With the tenet of "Focus on fresh and safe life only", we have had nearly 10 million temperature and humidity data loggers in use all over the world and have gained a good reputation for the high accuracy for time, temperature and humidity, especially for low temperature under -30ºC. We have an independent temperature and humidity verification environment to verify the long-term performance of products in different temperature and humidity environments; and our temperature and humidity data loggers have complied with CE, FDA, ROHS, EN12830 and RTCA/DO-160 standards. In addition to stable performance and compliance with safety regulations, our products are easy to operate, durable, and advanced in functionality.
In the future, our goal is to continuously provide our customers with more innovative, accurate, and higher-quality products, as well as excellent customer service and support.
OEM and ODM orders are welcome!





10 million pieces of loggers used globally.
Independent in-house lab for performance verification.
Superior production capability backed by actual data.
Certified by FDA, CE, EN12830, and ROHS.
A broad range of loggers to satisfy your diverse requirements.
Cost-effective solutions underpinned by expert quality.
24/7 customer service for prompt response and delivery.
Private label and comprehensive one-stop OEM service.
ISO-certified manufacturer ensuring quality assurance.
FAQ
Q1: Can I place a sample order first?
A1: Yes, we provide different pricing for small, medium, and large quantities. You can order at various price points based on the quantity.
Q2: How could I pay them?
A2: We provide a range of convenient payment methods including PayPal, Western Union, and T/T. Select whichever option suits you best, and we will swiftly send you our bank details. Additionally, we are open to accommodating any specific payment preferences you may have.
Q3: How to place the order?
A3: Placing an order is simple. Just send us your purchase order via e-mail, Trade Manager, or Skype. If you prefer, we can also prepare and send you a Proforma Invoice upon request to streamline the process.
Q4: How long can I get my order?
A4: For sample orders, we guarantee production and dispatch within 2-3 working days. For larger, bulk orders, expect a timeline of 5-20 working days, depending on your specific design requirements and order volume.
Q5: How to send us the products?
A5: We trust well-known carriers such as DHL, UPS, and FedEx to deliver your products safely and promptly to your location.
Q6: Can you customize according to our designs and put our logo on the products?
A6: Absolutely! We specialize in both standard and custom products, allowing for complete design customization and logo integration. Our expert R&D team is equipped to address any technical inquiries. We warmly welcome ODM/OEM collaborations and look forward to meeting your unique needs.