DL-301/WF Remote CO/Temperature/Humidity/Dew Point Data Logger with Safety Alarm (RS-485, Ethernet, PoE)


  • Simultaneous Display for CO, Temperature, Humidity and Dew Point
  • Measurement Range
    • CO: 0 ~ 1000 ppm
  • 2.8″ LCD Touch Screen
  • Able to store up to 450,000 records with date and time stamps
  • Touch-screen and Web-based Configuration Interfaces
  • Free Software Utility, iOS App and Android App Included
  • Able to Display Multilingual Messages
  • Supports the DCON, Modbus RTU, Modbus TCP and MQTT Protocols
  • Includes RS-485/Ethernet/PoE Communication Interfaces
  • Relay Output for Alarm Device or IAQ Device Control
  • Desktop, DIN-Rail or Wall Mounting


The DL-300 series of Data Logger devices can be used to record CO, CO2, Temperature, Humidity and Dew Point information, including date and time stamps, and are able to store up to 450,000 downloadable records. Real-time data can be accessed from the DL-300 Data Logger from anywhere and at any time using the free Windows software, the iOS App or the Android App. Support is provided for popular industrial protocols such as DCON, Modbus RTU, and Modbus TCP, as well as the emerging machine-to-machine (M2M)/)IoT (Internet of Things) connectivity protocol – MQTT. The DL-300 Data Logger can be connected via widely used communication interfaces including RS-485, Ethernet and PoE, meaning that the device can be easily integrated into existing HMI or SCADA systems, and is easy to be maintained in a distributed control system.Large 2.8″ LCD Touch Screen, with clear Color Chart to indicate the CO/CO2 Level

Supports the MQTT Protocol for IoT Applications

Powerful, Free iAir Utility Software
The iAir Utility can be used to configure the modules, monitor real-time data, group DL-300 modules so that the status of distribution groups can be viewed and managed. The utility also allows the log data to be downloaded and exported to a .CSV file that can then be imported into any industry-standard software or spread sheet for analysis.

SMART Mobile iAir App

iAir app is designed for connecting to the DL series via your smart phone or tablet.
It can retrieve real-time data from the DL series, and transfer messages to display on the DL-300 devices.

Link Keyword to Search QR Code

Display Messages in Multiple Languages
The display-message-on-screen function supports multiple language character sets based on UTF-8 encoding. Users can remotely display either pre-configured messages or dynamic messages to prompt an operator with a daily schedule or IAQ device control instructions.


  • Transportation of Food or Pharmaceuticals
  • Food and Beverage Industry (HACCP)
  • Blood Stations and Pharmacies
  • Building and Energy Management
  • Warehouse Management
  • Museums, Archives and Galleries


Basic Type (RS-485+Ethernet/PoE), Wi-Fi

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