Enregistreur de niveau d'eau - MX20L

Requires a compatible mobile device or Windows computer and the HOBOconnect app.
The MX20L Water Level Logger gives you all the same features as the U20L and more!
Features

• The self-contained, non-vented design allows for easy deployment
• Ideal for use in fresh and salt water environments, including wells, streams, lakes, wetlands, and tidal areas
• Depth measurement options up to 4, 9, or 30 meters depending on the model
• Durable, freeze-resistant ceramic pressure sensor
• Simplified data transfer via Bluetooth to the free HOBOconnect app
• The HOBOconnect app allows easy retrieval and viewing of water level data
• Extended battery life of up to 10 years (power-save mode requires a magnetic key fob to enable Bluetooth for data upload)

Note: No calibration certificate is offered for this logger.
The MX20L comes with a magnetic activation key to reactivate the logger and enable its Bluetooth communication for setup and data upload. The key comes with a lanyard to prevent loss or drop in the field. Additional activation keys are available for purchase.

This logger records absolute pressure, which is then converted into a water level measurement by our HOBOconnect software. To compensate for barometric pressure fluctuations, you can use another HOBO MX20L water level logger as a barometric reference.

Pressure (Absolute) and Water Level Measurements MX20L-01
- Operating Range

0 to 207 kPa (0 to 30 psia); approximately 0 to 9 m (0 to 30 ft) water depth at sea level, or 0 to 12 m (0 to 40 ft) water at 3,000 m (10,000 ft) elevation
- Factory Calibrated Range
69 to 207 kPa, 0° to 40°C
10 to 30 psia, 32° to 104°F
- Burst Pressure
310 kPa or 18 m depth
45 psia or 60 ft depth
- Water Level Accuracy*
- Typical Error: ± 0.1% FS, 1.0 cm (0.03 ft) water
- Maximum Error: ± 0.2% FS, 2.0 cm (0.06 ft) of water
- Raw Pressure Accuracy**
±0.3% FS, 0.62 kPa (0.09 psi) Maximum Error
- Resolution

< 0.02 kPa Water
0.007 ft of water
- Pressure Response Time (90%)***

< 1 second at stable temperature; Measurement accuracy also depends on temperature response time

0 to 400 kPa (0 to 58 psia); approximately 0 to 30.6 m (0 to 100 ft) water depth at sea level, or 0 to 33.6 m (0 to 111 ft) water at 3,000 m (10,000 ft) elevation
- Factory Calibrated Range
69 to 400 kPa (10 to 58 psia), 0° to 40°C (32° to 104°F)
- Burst Pressure
500 kPa (72.5 psia) or 40.8 m (134 ft) depth
- Water Level Accuracy*
- Typical Error: ±0.1% FS, 3.0 cm (0.1 ft) water
- Error Maximum: ±0.2% FS, 6.0 cm (0.2 ft) of water
- Raw Pressure Accuracy**
±0.3% FS, 1.20 kPa (0.17 psi) Maximum Error
- Resolution
< 0.04 kPa (0.006 psi), 0.41 cm (0.013 ft) of water
- Pressure Response Time (90%)***
< 1 second at stable temperature; measurement accuracy also depends on temperature response time

MX20L-04 Pressure (Absolute) and Water Level Measurements
- Operating Range
0 to 145 kPa (0 to 21 psia); approximately 0 to 4 m (0 to 13 ft) water depth at sea level, or 0 to 7 m (0 to 23 ft) water at 3,000 m (10,000 ft) elevation
- Factory Calibrated Range
69 to 145 kPa (10 to 21 psia), 0° to 40°C (32° to 104°F)
- Burst Pressure
310 kPa (45 psia) or 18 m (60 ft) depth
- Water Level Accuracy*
- Typical Error: ± 0.1% FS, 0.4 cm (0.013 ft) Water
- Maximum Error: ± 0.2% FS, 0.8 cm (0.026 ft) of water
- Raw Pressure Accuracy**
±0.3% FS, 0.43 kPa (0.063 psi) Maximum Error
- Resolution
< 0.014 kPa (0.002 psi), 0.14 cm (0.005 ft) of water
- Pressure Response Time (90%)***
< 1 second at stable temperature; Measurement accuracy also depends on temperature response time

Temperature Measurements (All Models)
- Operating Range
-20° to 50°C
-4° to 122°F
- Accuracy
±0.2°C from 0° to 50°C
±0.36°F from 0° to 50°C
- Resolution
0.10°C at 25°C
0.18°F at 77°F
- Response Time (90%)
10 minutes in water (typical)
- Stability (Drift)
0.1°C per year
0.18°F per year

Logger
- Wireless Standard
- Bluetooth 5 LE
- Transmission Range
- Line of Sight Approximately 30.5 m (100 ft)
- Radio Power
1 mW (0 dBm)
- Real Time Clock
±1 minute per month from 0° to 50°C (32° to 122°F)
- Battery
2/3 AA, 3.6 volt lithium, factory replaceable
- Battery Life (Typical Use)
3 years with 1 minute recording and Bluetooth always on
7 years with 1 minute recording, Bluetooth off and LED off
10 years with 5 minute recording, Bluetooth off and LED off
- Battery Indication
Battery status shown in HOBOconnect app (approximate)
- Memory (non-volatile)
Approximately 400,000 sets of pressure and temperature measurements
- Time Data upload time (with Bluetooth 5+ devices)
Approx. 3.5 minutes; 100,000 measurements < 1 minute
- Weight
Approx. 154 g (5.43 oz) in air
Approx. 53.9 g (1.9 oz) in fresh water
- Dimensions
3.18 cm (1.25 in) diameter, 15.24 cm (6.0 in) length; 6.3 mm (0.25 in) diameter mounting hole

- Wetted Materials: Polypropylene housing and cord; Viton and Buna-N O-rings; ceramic sensor in an acetal tip; stainless steel screws suitable for salt water
- Logging Modes: Fixed interval (normal or statistical), burst, or multiple intervals with up to 8 user-defined intervals and durations; logging intervals from 1 second to 18 hours. See the HOBOconnect user guide for details.
- Start Modes: Immediate, next interval, date and time, button start (key fob or app)
- Stop Modes: Memory full, never stop (overwrite oldest data), date and time, or after the set logging period
- Pause: Pause and restart with the HOBOconnect app
- Alarms: Record high or low alarm events; Alarm status is displayed in the HOBOconnect app
- Environmental Rating: IP68

* Water Level Accuracy: With accurate reference water level measurement, known water density, accurate barometric compensation data, and a stable temperature environment.
** Raw Pressure Accuracy: The absolute accuracy of the pressure sensor includes all errors due to sensor drift, temperature, and hysteresis.
*** Temperature Variations: Soak the pressure sensor for 20 minutes in water to fully temperature compensate it. The maximum error due to rapid temperature variations is approximately 0.5%.