Jeroen Smits
Manager Product- en Sector Specialists
HOBO MX802 Water Data Logger
For monitoring water conductivity/salinity, temperature, level, and more, the HOBO MX800 series Bluetooth loggers offer a highly configurable solution. This series includes an easy-to-deploy, fully submersible model (MX801) and a direct-readout model (MX802) for easy data transfer.
Nieuw product
The HOBO MX800 series of wireless data loggers offer a versatile and customizable solution for monitoring water quality and environmental parameters. This series, with interchangeable sensors, allows users to collect a wide range of water data, including conductivity/salinity, temperature, water level, and soon dissolved oxygen. Available in two models: the fully submersible model (MX801) for easy deployment, and the direct-readout model (MX802) that allows for data offload without removing the sensors from the water.
This series is the ultimate solution for collecting crucial water data, saving time, money, and peace of mind. With a single platform for monitoring multiple water parameters, the MX800 series offers features such as interchangeable sensors, easy calibration and setup, and user-replaceable batteries, making it an ideal choice for a wide range of applications.
The HOBO MX800 series is designed to provide flexibility and convenience in water data collection, thanks to the following features:
Compatibility with Various Sensors: Suitable for interchangeable conductivity, CTD (conductivity/temperature/depth), and DO (dissolved oxygen, coming soon) sensors, allowing for easy sensor swapping for different applications.
Bluetooth Connectivity: Enables easy logger configuration and data offload.
Easy to Deploy: The MX801 model is fully submersible and easy to set up.
Direct Readout: The MX802 model offers a convenient way to offload data without needing to remove the sensors from the water.
Compact Design: The logger’s diameter is less than 2 inches, making it easy to place.
Faster Data Offload: Via Bluetooth 5.0 for more efficient data transfer.
Water Detection Feature: Indicates when the logger has been out of the water (MX801).
Built-in Barometric Pressure Sensor: Included in the MX802 model.
Dual Sensor Connection: Connect two sensors to one logger to directly obtain measurements such as salinity-adjusted DO without the need for post-processing.
Guided Calibration: Ensures accurate data.
User-Replaceable Batteries: For added convenience and long-term use.
These features make the HOBO MX800 series an ideal choice for a wide range of applications, from environmental monitoring to water quality research, where accuracy, flexibility, and ease of use are paramount.
Technical specifications
Operating Range
-40° to 50°C (-40° to 122°F), should not 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 Connectable
2
Maximum Cable Length
120 m (400 ft)
Logging Rate
5 seconds 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 resume options
Start Modes
Immediate, next interval, or date and time
Stop Modes
Memory full, never stop (overwrites oldest data), date and time, or after a set logging period
Water Detection
Events are recorded when the logger is submerged or removed from 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 at a logging interval of 1 minute or slower
With W-DO sensor: 1 year, typical at a logging interval of 5 minutes or slower
Faster logging or statistics sampling intervals, burst logging mode, excessive readouts, and continuous connection with the app affect battery life
Memory
730,000 measurements, distributed across 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 as the device gets farther from the logger
Barometric Pressure (MX802 only)
Measurement and Calibration 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 stable temperature
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
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
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 suitable for use in saltwater; MX802 also has an ePTFE vent
Collar: HDPE, titanium screws
Note: The logger should be mounted so that no metal parts of the logger come into contact with other metals
Depth/Environmental Rating
MX802: IP67, NEMA 6; Weather-resistant (with cable or sealing plug attached); this model is not waterproof