HOBO MX800 Series Water Data Loggers
MX801 • MX802 Highly configurable wireless loggers for measuring water conductivity/salinity, temperature, level, and dissolved oxygen
HOBO MX800 Series wireless data loggers work with interchangeable sensors to provide a highly configurable solution for monitoring water conductivity/salinity, temperature, level, 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
Tilleggsinformasjon
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Spesifikasjoner
MX801 and MX802
- Operating Range
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-40° to 50°C (-40° to 122°F), cannot be frozen in ice
- Radio Power
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1 mW (0 dBm)
- Transmission Range
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Approximately 30.5 m (100 ft) line-of-sight
- Wireless Data Standard
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Bluetooth 5
- Number of sensors that can be connected
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2
- Maximum Cable Length
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120m (400 ft)
- Logging Rate
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5 second to 18 hours
- Logging Modes
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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
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Immediate, next interval or date & time
- Stop Modes
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Memory full, never stop (overwrite oldest data), date & time, or after a set logging period
- Water Detect
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Events are logged when logger is submerged or removed from the water (MX801 only
- Time Accuracy
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±1 minute per month 0° to 50°C (32° to 122°F)
- Battery
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Four AA, 1.5 V lithium batteries, user replaceable
- Battery Life
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With W-CTD or W-CT sensors: 2 years, typical with 1-minute logging interval or sloweWith 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
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730,000 measurements, divided between channels (4 Mbyte memory)
- Data Download Time (with Bluetooth 5+ devices)
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Full memory: Approximately 3.5 minutes120,000 measurements: 1 minuteMay take longer the further the device is from the logger
Barometric Pressure (MX802 only)
- Measurement & Calibrated Range
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66 to 107 kPa (9.6 to 15.5 psia), -20° to 50°C (-4° to 122°F)
- Accuracy*
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Typical error: ±0.2 kPa (0.029 psi)Maximum error: ±0.5 kPa (0.073 psi)
- Resolution
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<0.01 kPa (0.0015 psi)
- Pressure Response Time**
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<1 second to 90% at a stable temperature
- Contribution to Water Level Accuracy***
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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
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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
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Approximately xx g (xx oz) in air; approximately xx g (xx oz) in saltwater
- Wetted Materials
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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
- Environmental Rating
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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
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The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). |
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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 for 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.