HOBO MX20L Bluetooth Water Level Data Loggers
- Recording Water Level (Depth) and Temperature in Wet or Water Environments
- -20°C to 50°C Temperature Measurement Range with ±0.20°C Accuracy
- Factory-Replaceable 2/3 AA 3.6 Volt Lithium Battery with 10 Year Life (5-Minute Sampling Rate)
- Download Data Using Bluetooth Communications
- Setup, Configure and View Reports Online via HOBOconnect App or Browser
- Stores up to 400,000 Measured Readings with Date/Time Stamp
- 0 to 13 ft, 0 to 30 ft and 0 to 100 ft Water Level Ranges Available with Typical ±0.1% FS Accuracy
Includes Magnetic Activation FOB. HOBOconnect App Available on the Apple Store (iOS) and Google Play (Android)
Overview of the HOBO™ MX20L Series Bluetooth Water Level Data Logger
The HOBO™ MX20L from Li-Cor is a low-cost, research grade water level and temperature data logger with Bluetooth connectivity. With three available measurement depths of up to 13, 30, or 100 feet, the MX20L supports a wide range of applications. Robust plastic housing makes it ideal for both fresh and saltwater applications. Bluetooth connectivity eliminates the need to plug your logger into a base station or shuttle to offload recorded data. Instead, simply connect to the logger wirelessly in the field and use the free HOBOconnect app available for both Android and iOS devices. The MX20L water level data logger utilizes a unique magnetic key fob that wakes up the logger and activates the Bluetooth communication for configuration and data download. The key fob comes with an attached lanyard to help prevent losing or dropping it while in the field.
The factory replaceable battery has a typical battery life of up to 3 years when a 1-minute sample rate and Bluetooth always on. Battery life will increase to up to 10 years with a 5-minute sample rate with Bluetooth and LED off. The high-quality ceramic pressure sensor is very durable and able to withstand freezing.
HOBO™ MX20L Bluetooth Water Level Data Logger Specifications
| Data Channels | 1 Temperature Channel 1 Pressure/Water Level Channel |
| Water Level | Measurement Range (MX20L-01): 0 to 9m (0 to 30ft) - Sea Level; 0 to 12m (0 to 40ft) @ 3,000m Altitude Measurement Range (MX20L-02): 0 to 30.6m (0 to 100ft) - Sea Level; 0 to 33.6m (0 to 111ft) @ 3,000m Altitude Measurement Range (MX20L-04): 0 to 4m (0 to 13ft) - Sea Level; 0 to 7m (0 to 23ft) @ 3,000m Altitude Typical Accuracy (MX20L-01): ±0.1% FS (Full Scale), 1.0 cm (0.03 ft) Water Typical Accuracy (MX20L-02): ±0.1% FS (Full Scale), 3.0 cm (0.01 ft) Water Typical Accuracy (MX20L-04): ±0.1% FS (Full Scale), 0.4 cm (0.013 ft) Water Maximum Accuracy (MX20L-01): ±0.2% FS (Full Scale), 2.0 cm (0.06 ft) Water Maximum Accuracy (MX20L-02): ±0.2% FS (Full Scale), 6.0 cm (0.2 ft) Water Maximum Accuracy (MX20L-04): ±0.2% FS (Full Scale), cm (0.026 ft) Water Resolution (MX20L-01): 0.21 cm (0.007 ft) Water Resolution (MX20L-02): 0.41 cm (0.013 ft) Water Resolution (MX20L-04): 0.14 cm (0.005 ft) Water NOTE: Measurement Accuracy Also Depends on Temperature Response Time |
| Pressure | Pressure Range (MX20L-01): 0 to 207kPa (0 to 30 psia) Pressure Range (MX20L-02): 0 to 400kPa (0 to 58 psia) Pressure Range (MX20L-04): 0 to 145kPa (0 to 21 psia) Calibrated Range (MX20L-01): 69 to 207 kPa (10 to 30 psia) @ 0°C to 40°C Calibrated Range (MX20L-02): 69 to 400 kPa (10 to 58 psia) @ 0°C to 40°C Calibrated Range (MX20L-04): 69 to 145 kPa (10 to 21 psia) @ 0°C to 40°C Burst Pressure (MX20L-01): 310 kPa (45 psia) Burst Pressure (MX20L-02): 500 kPa (72.5 psia) Burst Pressure (MX20L-04): 310 kPa (45 psia) Raw Pressure Accuracy (MX20L-01): ±0.3% FS (Full Scale), 0.62 kPa (0.09 psi) - Max Error Raw Pressure Accuracy (MX20L-02): ±0.3% FS (Full Scale), 1.20 kPa (0.17 psi) - Max Error Raw Pressure Accuracy (MX20L-04): ±0.3% FS (Full Scale), 0.43 kPa (0.063 psi) - Max Error Resolution (MX20L-01): <0.02 kPa (0.003 psi) Resolution (MX20L-02): <0.04 kPa (0.006 psi) Resolution (MX20L-04): <0.014 kPa (0.0002 psi) Response Time: < 1 second @ stable temperature to 90% |
| Temperature | Measurement Range: -20°C to 50°C (-4°F to 122°F) Accuracy: ±0.2°C from 0°C to 50°C (±0.36°F from 32°F to 122°F) Resolution: 0.10°C at 25°C (0.18°F at 77°F) Response Time: 10 Minutes in Water to 90% (Typical) Stability (Drift): 0.1°C (0.18°F) per Year |
| Sampling Rate | 1 Second to 18 Hours (User-Specified) |
| Data Storage Capacity | 400,000 Pressure and Temperature Readings (When Bluetooth Communications Not Available) |
| Data Download Time | Approximately 3.5 minutes 1,000,000 measurements < 1 Minute |
| Logging Mode | Fixed Interval (Normal or Statistics), Burst or Multiple Intervals with up to 8 User-Defined Intervals and Durations |
| Start Mode | Immediately, Push Button, Date & Time or Next Interval |
| Stop Mode | Memory Full, Wrap When Data Storage Full, Push Button, Date & Time or After Set Interval |
| Alarms | High or Low Alarm Events, Logged and Alarm Status Shown in HOBOconnect App |
| Power Source | 2/3 AA 3.6 Volt Lithium Battery (User-Replaceable) |
| Battery Life | 3-Years: 1 Minute Logging and Bluetooth Always On 7-Years: 1-Minute Logging and Bluetooth Off and LED Off 10-Years: 5-Minute Logging and Bluetooth Off and LED Off |
| Battery Indication | Battery status shown in HOBOconnect app (approximate) |
| Time Accuracy | ±1 Minute per Month @ 25°C |
| Communications | Type: Bluetooth Wireless Wireless Data Standard: Bluetooth Smart (Bluetooth Low Energy, Bluetooth 5.0) Transmission Range: Up to 30.5 Meters (100 ft) Line of Sight Radio Power: 1 mW (0 dBm) |
| Software | HOBOconnect Software App for iOS and Android Note: Bluetooth 5.0 is Required on your Mobile Device (Phone or Tablet) |
| OS Compatibility | Android Phones and Tablets iPhone, iPad, iPod Touch with iOS 7.1 or Later Bluetooth 4.0 or Later |
| Operating Range | Temperature: -40°C to 70°C (-40°F to 158°F) Humidity: 0 to 100% RH |
| Standards Compliance | CE, IP68, FCC, CE, RoHS |
| Environment | Primarily Designed for Outdoor Usage |
| Wetted Materials | Polypropylene Housing and Lanyard; Viton and Buna-N O-rings; Ceramic Sensor in Acetal End Cap; Stainless Steel Screws Suitable for Saltwater |
| Weight | In Air: 154 grams (5.43 oz) In Air: 53.9 grams (1.9 oz) |
| Dimensions | 3.18 cm (Diameter) x 15.24 cm (Length)(1.25" x 6.0") Mounting Hole: 6.3 mm (0.25") Diameter |
