Elevate Your Monitoring Precision with HOBO MX800 Series Multiparameter Loggers

Enhance your monitoring capabilities with the versatile HOBO MX800 Series multiparameter wireless data loggers. These modular loggers seamlessly integrate with interchangeable sensors (sold separately) to measure water conductivity/salinity, temperature, depth, and soon-to-be-added dissolved oxygen. Choose between the fully submersible MX801 model and the direct read MX802 model for effortless data retrieval without sensor disturbance.

Seamless Integration for Enhanced Environmental Data Collection

Features

Enjoy compatibility with interchangeable Conductivity, CTD (conductivity/temperature/depth), and DO sensors (sold separately) for versatile applications, allowing easy swapping of sensors.
Utilise Bluetooth technology for seamless logger configuration and efficient data offloading.
Deploy effortlessly with the fully submersible MX801 model, ensuring ease of use.
Opt for the direct read MX802 model for convenient data retrieval.
Benefit from a compact logger diameter of less than 2 inches, ideal for various setups.
Experience faster data offloading through Bluetooth 5.0 connectivity.
Stay informed with the water detect feature indicating when the MX801 logger is out of water.
Access barometric pressure data with the included sensor in the MX802 model.
Connect two sensors to one logger to acquire measurements like salinity-adjusted DO directly, eliminating the need for post-processing.
Ensure accuracy with guided calibration procedures.
Enjoy the convenience of user-replaceable batteries for continuous operation.

Important Information

Requires the HOBOconnect app, and a compatible mobile device or Windows computer. System requirements for the app can be found at the bottom of our HOBOconnect software page.

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 and Temperature (CT) Sensor

Enhance your water monitoring experience with the versatile Conductivity and Temperature Sensor. This sensor accurately measures conductivity and temperature, enabling precise calculations of specific conductance, salinity, and total dissolved solids (TDS). Simplify data collection with features like a 4-electrode conductivity sensor, central positioning for reduced interference, and durable stainless steel construction for reliable performance in various environments.

Learn more >>

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.

Learn More >>

Technical Information
MX801 and MX802
Operating Range	-40° to 50°C (-40° to 122°F), cannot be frozen in ice
Radio Power	1 mW (0 dBm)
Transmission Range	Approximately 30.5 m (100 ft) line-of-sight
Wireless Data Standard	Bluetooth 5
Number of sensors that can be connected	2
Maximum Cable Length	120m (400 ft)
Logging Rate	5 second to 18 hours
Logging Modes	Fixed interval (normal or statistics), burst, or multiple intervals with up to 8 user-defined logging intervals and durations, with pause and repeat options
Start Modes	Immediate, next interval or date & time
Stop Modes	Memory full, never stop (overwrite oldest data), date & time, or after a set logging period
Water Detect	Events are logged when logger is submerged or removed from the water (MX801 only)
Time Accuracy	±1 minute per month 0° to 50°C (32° to 122°F)
Battery	Four AA, 1.5 V lithium batteries, user replaceable
Battery Life	With W-CTD or W-CT sensors: 2 years, typical with 1-minute logging interval or slower With W-DO sensor: 1-year, typical with 5-minute logging interval or slower Faster logging or statistics sampling intervals, entering burst logging mode, excessive readouts, and remaining connected with the app will impact battery life
Memory	730,000 measurements, divided between channels (4 Mbyte memory)
Data Download Time (with Blouetooth 5+ devices)	Full memory: Approximately 3.5 minutes 120,000 measurements: 1 minute May take longer the farther the device is from the logger
Barometric Pressure (MX802 only)
Measurement and Calibrated Range	66 to 107 kPa (9.6 to 15.5 psia), -20° to 50°C (-4° to 122°F)
Accuracy*	Typical error: ±0.2 kPa (0.029 psi) Maximum error: ±0.5 kPa (0.073 psi)
Resolution	<0.01 kpa="" 0="" 0015="" psi="" td="">
Pressure Response Time **	<1 second="" to="" 90="" at="" a="" stable="" temperature="" td="">
Contribution to Water Level Accuracy ***	Typical error: ±0.075% FS, 0.3 cm (0.01 ft) water Maximum error: ±0.15% FS, 0.6 cm (0.02 ft) water
MX801 and MX802 Specifications Continued
Dimensions	Logger diameter: 4.14 cm (1.63 inches) Length without sensor: 20 cm (8 inches) Length with W-CTD sensor: 36 cm (14 inches) Length with W-CT sensor: 33 cm (13 inches) Mounting loop: 12.7 x 22.6 mm (0.5 x 0.89 inches)
Weight	MX801 Logger Head Only \| 224 g (7.90 oz) MX802 Logger Head Only \| 226 g (7.97 oz)
Wetted Materials	Logger: PVC housing with polyester film label, PET sensor connector end cap and mounting handle with EPDM and Buna-N O-rings, passivated 316 stainless steel hardware rated for use in saltwater; MX802 also has ePTFE vent Collar: HDPE, titanium screws Note: logger should be mounted so that no metal parts of the logger are in contact with other metals
Environmental Rating	MX801: IP68; waterproof to 100m (with sensor(s) attached) MX802: IP67, NEMA 6; Weatherproof (with cable or Termination Plug attached); this model is not waterproof

* Pressure Accuracy: Absolute pressure sensor accuracy includes all sensor drift, temperature, and hysteresis-induced errors.

** Changes in Temperature: Allow 20 minutes in water to achieve full temperature compensation of the pressure sensor. There can be up to 0.5% of additional error due to rapid temperature changes.

***Water Level Accuracy: With accurate reference water level measurement, known water density, and a stable temperature environment. System Water Level Accuracy equals the sum of the Barometric Water Level Accuracy plus the selected CTD sensor Water Level Accuracy.

Water Monitoring Platform for the Future

View our free 1-hour webinar for an introduction to the HOBO MX800 series of Bluetooth data loggers. Designed with built-in Bluetooth for fast and easy wireless data offload, the HOBO MX800 series provides a single integrated platform for monitoring a range of critical water parameters, including water level, conductivity/salinity, temperature, and more. Presented by HOBO data logging expert Paul Gannett, webinar topics include:

· Key advantages of the fully submersible HOBO MX801 data logger

· Key advantages of the direct read HOBO MX802 data logger

· An overview of sensor types that work with the loggers

· Benefits of the HOBOconnect mobile app for wireless data download.

If you’re looking for a highly configurable water monitoring solution that features interchangeable sensors, easy calibration and setup, and user-replaceable batteries, this webinar is for you!

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.

For documentation on the app, click here >>