LevelVUEB10 Water-Level Continuous Flow Bubbler with Integrated Screen
Compact, Easy-to-Use Water-Level Bubbler
Meets or exceeds USGS OSW requirements
weather applications supported water applications supported energy applications supported gas flux and turbulence applications supported infrastructure applications supported soil applications supported


The LevelVue™B10 is a cost-effective, accurate, reliable solution for water-level measurements based on a non-submersible pressure transducer system. This type of sensor is a bubbler. Bubblers accurately measure the pressure it takes to create a continuous airflow in an airline submerged in water. The LevelVue B10 is designed for ease of use while providing long-term performance and accuracy. With a built-in keypad and display, you can complete your setup and site visit tasks using the LevelVue B10. The LevelVue B10 interfaces with data loggers or other controllers using SDI-12 or Modbus. 

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Benefits and Features

  • Low-power idle state for extended battery life
  • Proprietary high-pressure/high-volume purge operation to prevent sediment buildup
  • Simultaneous operation on the SDI-12 interface and Modbus interface
  • Built-in keypad/display for full setup and maintenance operation
  • Incorporated SDI-12 version 1.4 metadata commands for identification of data
  • Standard cold temperature (-40°C) operation
  • Proprietary air flow/bubble generation designed for years of trouble-free operation


LevelVUE™B10 mounted to a pole (items sold separately)

Technical Description

The LevelVue B10 bubbler incorporates all the components needed to be a self-contained, pressurized air-supply system. This bubbler has an industrial air compressor (-40° to +80°C), large air tank (0.8 L), and other components that replace the need for pressurized air tanks and manual valves found in the older continuous gas flow systems. The LevelVue B10 meters the airflow to create a constant flow in the orifice line regardless of the water depth above the outlet. Precision sensors monitor the tank pressure and the line pressure to consistently maintain the same airflow. The precision sensor monitoring the pressure on the orifice line precisely detects the pressure required to push air through the line. This pressure value is directly related to water depth. Applying a simple conversion to the pressure value creates the value of water depth in feet, meters, or other units of measure.


Operating Temperature Range -40° to +60°C
Storage Temperature Range -40° to +80°C
Relative Humidity 0 to 95% (non-condensing)
Accuracy ≤ 0.02% of full-scale output (FSO) over temperature range
Sensor Overpressure Rating 2 times the pressure
Memory All settings and parameters are stored in non-volatile memory.
Real-Time Clock Clock continues to operate with lithium battery, preserving the bubbler's time over power disconnects.
Long-Term Drift 0.1% FS/6 months
Enclosure Material Fiberglass
Enclosure Dimensions 28.89 x 33.66 x 13.34 cm (11.375 x 13.25 x 5.25 in.) external
Enclosure Weight 7.48 kg (16.5 lb)

Sensor Resolution for Range

0 to 10.54 m (34.6 ft) ±2.1 mm (0.007 ft) for 0 to 15 PSI
0 to 21 m (69.2 ft) ±4.26 mm (0.014 ft) for 0 to 30 PSI
0 to 35.16 m (115.35 ft) ±7.11 mm (0.023 ft) for 0 to 50 PSI


Airflow Type Microprocessor-controlled constant airflow over full pressure range and temperature
Bubble Rate
  • 30 to 120 bubbles per minute (programmable; based on 0.635 cm [0.25 in.] inner diameter outlet)
  • 60 bubbles per minute (default)
Manual Purge Operation Immediate purge triggered via built-in keypad/display, SDI-12 command, or Modbus register
Purge Pressure 30 to 90 PSI (user-programmable)
Purge Activation
  • Built-in keypad
  • Automated under program control using SDI-12 extended command or Modbus register
  • Scheduled from once a day to once every 30 days; 1-day resolution
Purge Sustain Time 0 to 30 s (programmable)
Pressure Inlet 1/8 in. female NPT
Orifice Line Outlet 1/8 in. female NPT


Input Voltage Range 11.5 to 16.5 V
  • 5 mA (standby)
  • 10 A (compressor active, maximum)
  • 7 A (compressor active, typical)
  • 18 A (maximum startup surge)
Power Protection Power inputs are protected against surge, overvoltage, and reverse polarity connection of supply power up to 20 VDC. The internal air compressor is protected by the system level reverse polarity protection.
Power Consumption Power consumption is less than 60 mA on average at a 60 bubble/min rate with averaged samples over 10 seconds.


Output Options SDI-12, RS-485
SDI-12 Protocol SDI-12 V1.4 compliant
SDI-12 Default "M" Measurement Response Time 8 s
RS-485 Protocol Modbus, 8 data bits, no parity, 1 stop bit
RS-485 Baud Rate 9600
Keypad/Display Description
  • 8-line by 20-character OLED graphical display
  • Operational over the entire temperature range.
  • Application-specific menu provides complete system setup.


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.


Product Compatible Note
CR800 (retired)
CR850 (retired)


LevelVue B10 OS v.2.1 (467 KB) 03-11-2021

Current LevelVue B10 Operating System. The Device Configuration Utility is used to send this Operating System to the LevelVue B10.

View Revision History

FAQs for

Number of FAQs related to LevelVUEB10: 8

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  1. No. The unit has temperature compensation on it, but it is the temperature of the sensors that will be very different from the water temperature.

  2. No. A stilling well is not needed. The orifice line is normally installed inside a two-inch conduit and secured in place, so there is no movement in the orifice line. It is best to install the outlet just above the sediment in the water to be measured. When the orifice line is securely installed, the unit makes accurate measurements of the water—even if the water has some movement, such as in a river. The measurement averaging time can also be increased to reduce the noise in the data, providing the same function that the stilling well does to average out the fluctuations of the water.  

  3. The LevelVue B10  does not log its own data and does require a data logger.

  4. Yes. This bubbler supports the SDI-12 interface as a sensor or server, so any data logger that supports SDI-12 as a client will work.

  5. No. This is not a good data value for ambient air temperature. It is the temperature as seen by the internal pressure sensing element, and it will be affected by several other factors. For example, direct sunlight on an enclosure will heat it up much higher than ambient air temperature.

  6. Yes. This system also supports Modbus, which is supported by most PLCs.

  7. Yes. The orifice can be installed in the well piping. Normally the orifice line is supported by a separate stainless-steel cable to prevent the orifice line from moving up or down, as this movement would show up in the data.

  8. The only item that requires regular maintenance is the desiccant. The interval that this needs servicing is based on the relative humidity of the site and how often the unit turns on the pump. Purging more often will draw air into the system, so that would shorten the time between visits to replace the desiccant.

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