HOBO MX801 Series Water Data Loggers
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. 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
MX801
| Parameter | Detail |
|---|---|
| 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 |
|
| Memory | 730,000 measurements, divided between channels (4 Mbyte memory) |
| Data Download Time (with Bluetooth 5+ devices) |
|
| 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 |
| 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 |
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