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OVERVIEW
Versatile, Reliable, and Cost-Effective Water Level Monitoring
The MX20L Water Level Logger combines affordability with research-grade performance, offering precise and continuous monitoring of water level and temperature. With integrated Bluetooth technology, it provides quick and seamless wireless data offload, eliminating the need for cables or base stations and making fieldwork more efficient.
Capable of measuring at depths of 4, 9, or 30 meters, the MX20L is designed for diverse applications in both freshwater and saltwater environments, including groundwater wells, streams, lakes, wetlands, and tidal areas. Its durable polypropylene housing and non-vented design ensure reliable performance even in harsh and long-term deployments. With an impressive 0.1% measurement accuracy, you can trust the MX20L for high-quality data collection.
Using the free HOBOconnect app on a mobile device or Windows computer, the logger allows for easy setup, configuration, and data download. To further streamline deployment, it includes a magnetic activation fob, allowing you to effortlessly “wake up” the device to enable Bluetooth communication or download data. The device records absolute pressure readings, converted to water level insights via HOBOconnect, and can be paired with another MX20L to compensate for barometric pressure changes.
Whether you’re tracking changes in aquatic ecosystems, monitoring storm drains, or planning urban water resource management, the HOBO MX20L addresses challenges like data inaccuracy and difficult deployments, providing a reliable, field-ready solution. It’s the perfect partner to empower your efforts in environmental monitoring and drive better decision-making for sustainable resource management.
Discover Smarter Water Level Monitoring—Get Started with the MX20L Today!
Features
- Equipped with a self-contained, non-vented design for seamless and straightforward deployment.
- Designed for versatility, suitable for both freshwater and saltwater environments, including wells, streams, lakes, wetlands, and tidal zones.
- Offers flexible depth measurement capabilities, available in models supporting depths of 4, 9, or 30 meters.
- Built with a robust ceramic pressure sensor capable of withstanding freezing conditions.
- Enables efficient data transfer through Bluetooth connectivity to the free HOBOconnect app.
- The HOBOconnect app ensures effortless extraction and clear visualisation of water level data.
- Features an extended battery life of up to 10 years, with power-saving mode activated via a magnetic fob for Bluetooth data downloads.
Note: A calibration certificate is not offered for this logger. If you require a NIST-traceable calibration certificate, please see the U20 range here >>
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SPECIFICATIONS
Pressure (Absolute) and Water Level Measurements MX20L-01
Operation Range 0 to 207 kPa (0 to 30 psia); approximately 0 to 9 m (0 to 30 ft) of water depth at sea level, or 0 to 12 m (0 to 40
ft) of water at 3,000 m (10,000 ft) of altitudeFactory 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) WaterRaw Pressure Accuracy** ±0.3% FS, 0.62 kPa (0.09 psi) Maximum error Resolution <0.02 kPa Water (0.007 ft Water)
Pressure Response Time (90%)*** <1 second at a stable temperature; measurement accuracy also depends on temperature response time
Pressure (Absolute) and Water Level Measurements MX20L-02
Operation Range 0 to 400 kPa (0 to 58 psia); approximately 0 to 30.6 m (0 to 100 ft) of water depth at sea level, or 0 to 33.6 m (0
to 111 ft) of water at 3,000 m (10,000 ft) of altitudeFactory 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
Maximum error: ±0.2% FS, 6.0 cm (0.2 ft) WaterRaw 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) Water
Pressure Response Time (90%)*** <1 second at a stable temperature; measurement accuracy also depends on temperature response time
Pressure (Absolute) and Water Level Measurements MX20L-04
Operation Range 0 to 145 kPa (0 to 21 psia); approximately 0 to 4 m (0 to 13 ft) of water depth at sea level, or 0 to 7 m (0 to 23
ft) of water at 3,000 m (10,000 ft) of altitudeFactory 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) WaterRaw 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) Water
Pressure Response Time (90%)*** <1 second at a stable temperature; measurement accuracy also depends on temperature response time
Temperature Measurements (All Models)
Operation Range -20° to 50°C (-4° to 122°F) Accuracy ±0.2°C from 0° to 50°C (±0.36°F from 32° to 122°F) 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 Approximately 30.5 m (100 ft) line-of-sight Radio Power 1mW (0 dBm) Real-time Clock ±1 minute per month 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 logging and Bluetooth always on
7 years with 1-minute logging and Bluetooth off and LED off
10 years with 5-minute logging and Bluetooth off and LED offBattery Indication Battery status shown in HOBOconnect app (approximate) Memory (Non-volatile) Approximately 400,000 sets of pressure and temperature measurements Data Download Time (with Bluetooth 5+ devices) Full Memory: Approximately 3.5 minutes (1000,000 measurements < 1 minute) Weight Approximately 154 g (5.43 oz) in air
Approximately 53.9 g (1.9 oz) in fresh waterDimensions 3.18 cm (1.25 inches) diameter, 15.24 cm (6.0 inches) length; mounting hole 6.3 mm (0.25 inches) diameter Wetted Materials Polypropylene housing and lanyard; Viton and Buna-N O-rings; ceramic sensor in acetal end cap; stainless
steel screws suitable for saltwaterLogging Modes Fixed-interval (normal or statistics), burst or multiple intervals with up to 8 user-defined intervals and durations;
logging intervals from 1 second to 18 hours. Refer to the HOBOconnect User’s Guide for details.Start Modes Immediate, next interval, date & time, button start (fob or app) Stop Modes Memory full, never stop (overwrite oldest data), date & time, or after set logging period Pause Pause and restart with HOBOconnect app Alarms Log high- or low-alarm events; alarm status shown in 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: 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. Maximum error due to rapid thermal changes is approximately 0.5%. -
HOBOCONNECT
Download the free HOBOconnect app for your iOS or Android mobile device or Windows computer today.
Onset’s HOBOconnect app, accessed from a free download from the iTunes or Google Play app store, or your pc, makes it quick and easy to configure compatible MX Series data loggers (chart below) and manage the collected data. From your mobile device, tablet, or Windows computer, users can view data in graphs, check the operational status of loggers, share data files and graph images for analysis in Excel, Numbers, and other applications, and store data in the cloud. HOBOconnect also makes it fast and easy to set up audible alarm notifications so users are immediately notified of problems.
Learn more about HOBOconnect >>
HOBO MX20L – Water Level Bluetooth Data Logger
From: $0.00 ex GST
The MX20L Water Level Logger delivers reliable water level and temperature monitoring with Bluetooth connectivity for seamless data offload. Ideal for diverse freshwater and saltwater applications. Offering robust durability, adaptable depth options, and long battery life, this device simplifies data management for environmental science and water resource professionals.
