Single Orifice Constant Flow Bubble Gauge/Recorder

The Accubar® Constant Flow (CF) Bubble Gage is a self-contained, precision device to measure water levels & water temperature, consisting of a pump, tank, manifold, control board, display/keypad & enclosure.
The CF Bubbler’s built-in precision Accubar® Pressure Sensor meets the high accuracy requirements for stream gaging & monitoring of tidal/coastal areas, estuaries, groundwater, & reservoirs.
The Bubbler includes a built-in datalogger for stand-alone operation &/or backup (redundant) data recording and RS232 & SDI-12 ports for communications & maintenance. Also supports MODBUS.

  • New Models with Water Temperature Measurements
  • Self-contained system needing only external power & outlet tubing/orifice
  • Long desiccant life (up to 1 year)
  • Adjustable bubble rate
  • Auto-zero function
  • The CF Bubbler supports MODBUS protocol.
  • Configurable averaging
  • User-variable auto purge & user-forced purge option
  • Flexible auto blockage detection
  • Modifiable auto measurement & logging
  • Built-in flash log for over 300,000 readings*
  • Stand-alone or operation with other loggers/communication devices
  • Precision Accubar® Pressure Sensor!!
  • Front panel setup & maintenance.
  • SDI-12/RS232 interfaces compatible with loggers, cell modems, SatLink2 Transmitter/Logger
  • Swing-out front panel for easy maintenance.
  • Easier re-calibration
  • 3 Levels of filtration


  • Measurements:
Stage/Level, Pressure, Internal Temp, Battery, Optional: water temperature
  • Automeasure Interval:
1 second to 24 hours
  • Stage/Level/Pressure Accuracy:
Pressure/stage/Level: 0.05% reading with minimum of 0.01 ft.
  • Measurement Technique:
Constant flow bubbler with bubble rate programmable by user. Pressure is measured by Sutron Accubar sensor.
  • Stage/Level/Pressure Range:
25 psi, 57 ft, 17 meters; 50 psi, 115 ft,35 meters
  • Water Temperature Range (optional):
-5 C to + 45C
  • Water Temperature Accuracy (optional):
  • Maximum Purge Pressure:
50 psi or 70 psi based on model
  • Desiccant:
Silica Gel, lasts up to a year
  • Outlet:
4/6mm tube or 3/8″³ tube based on model
  • Enclosure:
Fiberglass NEMA-4, IP64, lockable
  • Communication Ports:
SDI-12, RS232, RS485
  • Operating Temperature:
-25C to +60C standard, -40C to +60C optional
  • Display Type:
2 x 20 LCD with backlight
  • Keypad Type:
6 button
  • Memory:
Built-In Flash: >300,000 readings
SD/MMC Card: yes
USB: no
  • Ethernet:
  • Power Requirements:
8 to 16 VDC
  • Max Current:
4 amp for 25 psi unit, 8 amp for 50 psi
  • Communication Protocols Supported:
MODBUS (via RS232 only), SDI-12, command line
  • Programming:
via front panel, commandline or SDI-12
  • Device Dimensions:
Height: 15″ (38.1 cm)
Length: 12″ (30.5 cm)
Width: 7.5″ (19.1 cm)
Weight: 20 lbs. (9.1 kg)



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