HOBO MX802 Water Data Logger

Data Loggers

HOBO MX802 Water Data Logger

  • Vendor:Onset

Availability: Available Item
Qty Price
Buy 1 $769.00 ea
Buy 10 $730.55 ea


A highly configurable solution for monitoring water conductivity/salinity, temperature, level, and more, HOBO MX800 series Bluetooth loggers come in an easy-to-deploy fully submersible model (MX801) and a direct read model (MX802) for convenient data offload without removing the sensor from the water. Save time, money, and your peace of mind with a single platform for monitoring multiple water parameters, featuring interchangeable sensors, easy calibration and setup, and user-replaceable batteries.

Highlighted 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

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 Bluetooth 5+ devices) Full memory: Approximately 3.5 minutes 120,000 measurements: 1 minute May take longer the further the device is from the logger
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)
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