Part Numbers
MX801 • MX802
HOBO MX800 Series Water Data Loggers
Bluetooth Multiparameter Data Logger
Important Information
Requires the HOBOconnect mobile 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.
Compatible with
Overview
HOBO MX800 Series multiparameter wireless data loggers work with interchangeable sensors to provide a highly configurable solution for monitoring water conductivity/salinity, temperature, depth, and dissolved oxygen (coming soon). Available in both an easy-to-deploy, fully submersible model (MX801) and a direct read model (MX802) for convenient data offload that doesn’t require having to remove sensors from the water.
Features
- Compatible with interchangeable Conductivity, CTD (conductivity/temperature/depth), and DO sensors (sold separately) - swap out sensors for different applications
- Bluetooth, for easy logger configuration and data offload
- Easy to deploy, fully submersible (MX801)
- Direct read for convenient data offload (MX802)
- Logger diameter is less than 2 inches
- Faster data offload via Bluetooth 5.0
- Water detect feature indicates when logger was out of the water (MX801)
- Barometric pressure sensor included (MX802)
- Connect two sensors to one logger to get measurements like salinity adjusted DO directly, with no need for post-processing
- Guided calibration ensures accurate data
- User-replaceable batteries
Build a system
Specifications
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 slowerWith W-DO sensor: 1-year, typical with 5-minute logging interval or slowerFaster 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 Bluetooth 5+ devices)
-
Full memory: Approximately 3.5 minutes120,000 measurements: 1 minuteMay take longer the farther the device is from the logger
Barometric Pressure (MX802 only)
- Measurement & 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)
- Pressure Response Time**
-
<1 second to 90% at a stable temperature
- Contribution to Water Level Accuracy***
-
Typical error: ±0.075% FS, 0.3 cm (0.01 ft) waterMaximum error: ±0.15% FS, 0.6 cm (0.02 ft) water
MX801 & MX802 Specs, 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 Only224 g7.90 ozMX802 Logger Head Only226 g7.97 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 ventCollar: HDPE, titanium screwsNote: logger should be mounted so that no metal parts of the logger are in contact with other metals
- Depth/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
| The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). |
| The UKCA marking identifies this product as complying with all relevant directives in the UK Declaration of Conformity. |
* 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.
Compatible items
Sensors
Accessories
Well Caps
Protective Enclosures
Communication Cables
What's in the box
- HOBO MX801 or MX802 data logger
- Coupler
- 3/32” Allen wrench
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