The HOBO MX801 Conductivity & Temperature Kit delivers an easy, modern way to monitor key water quality parameters. This kit pairs the Bluetooth-enabled, fully submersible MX801 logger with a high-accuracy conductivity and temperature sensor, giving you reliable performance in both freshwater and saltwater applications.

Designed for effortless setup and rapid data offload via HOBOconnect, the MX801 offers a smart upgrade path from legacy U24 loggers. The included CT sensor captures conductivity and temperature, enabling calculations for specific conductance, salinity, and TDS—all in one compact, durable probe. Need to track additional parameters, like Dissolved Oxygen or Depth? No problem—MX800 loggers support up to two sensors of your choice, offering maximum flexibility. You can learn more about MX800 Multiparameter Data Loggers and configure a customised version HERE.

Key Features:

• Bluetooth connectivity for quick, wireless logger setup and fast data offload
• Fully submersible design for easy, reliable deployment in a wide range of water environments
• Slim profile (<2″ diameter) for use in tight spaces, wells, and narrow deployment locations
• Water detect function automatically flags when the logger was out of the water
• Guided calibration workflow ensures accurate, repeatable measurements
• Supports up to two interchangeable MX800 sensors (REQUIRES 2-SENSOR ADAPTER)
• User-replaceable batteries for simple maintenance and extended field use
• Includes MX801 Submersible Data Logger and Conductivity & Temperature (CT) sensor

Everything you need to start monitoring

MX801 Multiparameter Data Logger

Fully submersible Bluetooth-enabled logger designed for fast setup, guided calibration, and wireless data offload. Supports up to two interchangeable MX800 sensors for flexible water monitoring.

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W-CT Conductivity & Temperature Sensor

Versatile, durable sensor measuring conductivity and temperature, enabling specific conductance, salinity, and TDS calculations. Features a 4-electrode design and rapid-response temperature element for accurate results in fresh or saltwater.

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Interchangeable Sensors: Enhancing Your Water Monitoring Capabilities

Introducing a range of versatile sensors for the HOBO MX800 Series, including the Conductivity and Temperature Sensor, CTD Sensor, and the upcoming Dissolved Oxygen Sensor. These sensors empower precise water parameter measurements, enabling seamless integration with MX800 loggers for enhanced monitoring efficiency.

Conductivity, Temperature & Depth (CTD) Sensor

Elevate your water monitoring capabilities with the HOBO MX800 Series CTD Sensor. This advanced Conductivity/Temperature/Depth sensor, available in various depths, is designed for precision in freshwater and saltwater environments. The interchangeable CTD sensor offers accurate measurements of conductivity, temperature, and water level, enabling MX800 loggers to calculate specific parameters effortlessly.

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Dissolved Oxygen Sensor (DO)

Enhance your monitoring precision with the HOBO MX800 Series DO Sensor. This versatile sensor enables accurate dissolved oxygen (DO) and temperature measurements, seamlessly integrating with MX800 Water Loggers. Pairing with conductivity or CTD sensors allows for salinity-adjusted DO readings, while the MX802 calculates DO percent saturation instantly.

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See the MX800 Logger User Guide page for Data Logger and CT Sensor Specifications

View the resource here >>

Download the free HOBOconnect app for your iOS or Android mobile device or Windows computer today.

Onset’s HOBOconnect app, accessed from a free download from the iTunes or Google Play app store, or your pc, makes it quick and easy to configure compatible MX Series data loggers (chart below) and manage the collected data. From your mobile device, tablet, or Windows computer, users can view data in graphs, check the operational status of loggers, share data files and graph images for analysis in Excel, Numbers, and other applications, and store data in the cloud. HOBOconnect also makes it fast and easy to set up audible alarm notifications so users are immediately notified of problems.

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