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OVERVIEW
The MX20 delivers the accuracy and reliability demanded by researchers, consultants, and water resource managers. An integrated absolute pressure sensor eliminates vent tubes and desiccants, reducing maintenance and field visits. NIST-traceable 3-point calibration is included. Bluetooth wireless data offload saves time in the field. Steel construction for freshwater, titanium for saltwater. Rated to 4, 9, 30, or 76 metres depth. Built for long-term monitoring up to 10 years.
Features
- Research-grade accuracy supports groundwater studies, regulatory reporting, water resource management, scientific research and other professional applications
- Rugged construction endures for long-term monitoring up to 10 years
- Time-saving wireless data offload from integrated Bluetooth simplifies workflows
- HOBOconnect mobile app provides easy conversion to accurate water level reading, fully compensated for barometric pressure, temperature, and water density
- Cost-effective performance solution for monitoring large number of wells/locations
- Reliable absolute pressure sensor eliminates the need for vent tubes prone to clogging or freezing and desiccants
- Available in four depth ranges
- Compact-diameter design allows deployment in narrow wells while leaving room for suspension cables and other equipment
- Available in stainless steel (freshwater) and Titanium (saltwater) versions
- 3-point NIST-traceable calibration certificate included
Barometric Pressure Compensation
The MX20 records absolute pressure and converts it to water level via HOBOconnect. For accurate water level data, pair it with an MX20L-04 logger for barometric pressure compensation. One baro logger covers multiple MX20 sensors in the same location; deploy additional loggers if sensors are spread across different sites or elevations. Buy Now →
Benefits of LI-COR Cloud Monitoring Software
- Access monitoring data from anywhere
- Visualise, analyse, and share data with your team
- Securely upload and manage field data in LI-COR Cloud
The MX20 is a scalable solution that simplifies workflows and data collection from large numbers of wells for hydrologists, field technicians, mitigation specialists, and others, these loggers can offload data to LI-COR Cloud® software with an accompanying MX Data Plan, which gives users access to a range of time-saving tools.
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SPECIFICATIONS
Pressure (Absolute) and Water Level Measurements MX20-01 and MX20-01-Ti
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 altitude Factory Calibrated Range 69 to 207 kPa (10 to 30 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: ±0.05% FS, 0.5 cm (0.015 ft) water Maximum error: ±0.1% FS, 1.0 cm (0.03 ft) water Raw Pressure Accuracy** ±0.3% FS, 0.62 kPa (0.09 psi) maximum error Resolution <0.02 kPa (0.003 psi), 0.21 cm (0.007 ft) water Pressure Response Time (90%)*** <1 second; measurement accuracy also depends on temperature response time Pressure (Absolute) and Water Level Measurements MX20-02 and MX20-02-Ti
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 altitude 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: ±0.05% FS, 1.5 cm (0.05 ft) water
Maximum error: ±0.1% FS, 3 cm (0.1 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; measurement accuracy also depends on temperature response time Pressure (Absolute) and Water Level Measurements MX20-03 and MX20-03-Ti
Operation Range 0 to 850 kPa (0 to 123.3 psia); approximately 0 to 76.5 m (0 to 251 ft) of water depth at sea level, or 0 to 79.5 m (0 to 262 ft) of water at 3,000 m (10,000 ft) of altitude Factory Calibrated Range 69 to 850 kPa (10 to 123.3 psia), 0° to 40°C (32° to 104°F) Burst Pressure 1200 kPa (174 psia) or 112 m (368 ft) depth Water Level Accuracy* Typical error: ±0.05% FS, 3.8 cm (0.125 ft) water
Maximum error: ±0.1% FS, 7.6 cm (0.25 ft) waterRaw Pressure Accuracy** ±0.3% FS, 2.55 kPa (0.37 psi) maximum error Resolution <0.085 kPa (0.012 psi), 0.87 cm (0.028 ft) water Pressure Response Time (90%)*** <1 second; measurement accuracy also depends on temperature response time Pressure (Absolute) and Water Level Measurements MX20-04 and MX20-04-Ti
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 altitude 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: ±0.075% FS, 0.3 cm (0.01 ft) water
Maximum error: ±0.15% FS, 0.6 cm (0.02 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; 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 0.002°C at 25°C (0.004°F at 77°F) Response Time (90%) 5 minutes in water (typical) Stability Drift 0.1°C (0.18°F) per year Logger
Wireless Standard Bluetooth 5 LE Transmission Range Approximately 3-10 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 offMemory (non-volatile) Approximately 400,000 sets of pressure and temperature measurements Weight Stainless steel models: approximately 210 g (7.4 oz)
Titanium models: approximately 140 g (4.8 oz)Dimensions 2.46 cm (0.97 inches) diameter, 15 cm (5.9 inches) length; mounting hole 6.3 mm (0.25 inches) diameter Wetted Materials Stainless Steel models: 316 stainless steel, Viton® O-rings, acetal cap, ceramic sensor
Titanium models: Titanium, Viton O-rings, acetal cap, ceramic sensorLogging 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 Users Guide for details. Launch Modes Immediate start and delayed start Offload Modes Offload while logging; stop and offload 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 app Alarms Log high- or low-alarm events; alarm status shown in app Battery Indication Battery status shown in app (approximate) Environmental Rating IP68 The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). The UKCA marking identifies this product as complying with all relevant directives in the UK Declaration of Conformity. This marking identifies this product as complying with all relevant directives in Australia and New Zealand. This marking identifies this product as complying with specific limits defined in the United States by the FCC and identified on the last page of this document See the last page of the User Manual for details on compliance in the United States, Canada, and Taiwan. * Water Level Accuracy: With accurate reference water level measurement, known water density, accurate barometric pressure 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 10 minutes in water to achieve full temperature compensation of the pressure sensor. Maximum error due to rapid thermal changes is approximately 0.5%.
HOBO MX20 Bluetooth Water Level Data Logger
Price range: $1,581.00 through $1,917.00 ex GST AUD
Research-grade water level logger for professional monitoring. Absolute pressure sensor, NIST-calibrated accuracy, wireless data offload. Rugged design built for up to 10 years of unattended deployment in freshwater or saltwater environments.
