HOBO MX800 loggers feature Bluetooth technology for streamlined logger setup and data offload via a wireless connection to a mobile device or Windows laptop running the free HOBOconnect app. Choose the easy-to-deploy, fully submersible HOBO MX801 model or the time-saving direct read HOBO MX802 model, which allows cable-connected sensors to remain in the water during data offload.
Key benefits include:
- Fast data offload to the HOBOconnect app via Bluetooth
- Guided calibration for reliable,accurate data
- Interchangeable sensors that can beeasily swapped for different applications
- A water detect feature that indicates when the logger was out of the water (MX801)
- Direct water level measurements via built-in barometric pressure sensor (MX802)
- User-replaceable batteries eliminate the need to return loggers for battery replacement
HOBO MX800-compatible sensors currently come in three configurations: Conductivity/ Temperature, Conductivity/Temperature/ Depth (CTD), and Dissolved Oxygen/ Temperature.
- Conductivity/Temperature & CTD: Featuring a 4-electrode conductivity sensor that provides a wide measurement range (0 to 100,000 uS/cm) and 2% accuracy, with centrally located electrodes to minimize potential measurement errors from nearby stilling wells and housings. These sensors calculate electrical conductivity, specific conductance, salinity, and total dissolved solids (TDS), for a comprehensive data set.
- Dissolved Oxygen/Temperature: Delivering high-accuracy measurements (±0.1 mg/L over 0 to 20 mg/L range) with a user-replaceable DO cap that lasts two years or more for long-term deployments. Setup is made easy with the included calibration boot and guided calibration software.
An optional adapter enables connecting two sensors to one logger, simplifying deployment and streamlining data management, saving time and money. For example, when combining a dissolved oxygen sensor with a conductivity sensor, the user can log salinity-adjusted DO directly, eliminating the need for post-processing.
Pricing for HOBO MX800 Series Loggers starts at $1,040 USD for the MX801 logger with a Conductivity/Salinity sensor.
This spotlight was featured in the 2025-2026 Marine Instruments Buyers’ Guide, read more here.
