Sensor Temperature & Humidity with Modbus TCP



• Simulation Display for CO, CO2, Temperature, Humidity and Dew Point
• Includes RS-485/Ethernet/PoE Communication Interfaces
• Touch-screen and Web-based Confi guration Interface
• 2.8″ LCD Touch Screen
• Non-dispersive Infrared (NDIR) CO2 Sensor
• Relay Output for Audible/Visual Alarm or IAQ Device Control
• Able to store up to 450,000 records with date and time stamps
• RS-485 Communication interface
• 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, as long as they are connected to the same local network as the Data Logger. 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


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