Dual Orifice Constant Flow Bubble Gage & Recorder

The Sutron Accubar® Constant Flow (CF) Dual Orifice Bubble Gauge/Recorder, a self-contained, precision device for measuring water levels, water temperature*, suspended sediment* & density* using long established bubble gauge principles, combines the following components into a single package. Ideal for rivers, streams, dams & reservoirs, oceans & industrial areas plus any area where water density changes, eg, tidal & estuary areas.

User-set measurement and logging. Version -2 make separate measurements in 2 locations. The Bubbler managers pressure on each orifice line independently so that pressures in one line do not affect operation of the other line.
Make measurements in separate channels or separate bodies of water or within the same area as redundant sensors (-2 version)
Intall the Bubbler orifice with a vertical separation to get an extended range measurement of up to 50 psi total on a 25 psi unit.
The -3 version adds a special ultra-accuate density sensor. The -3 density measurement is more accurate (0.1%) than measurements by separate stage sensors on-site would be.
Bubbler is both a logger and a sensor, capable of working as a stand-alone or with other loggers/communcations devices via SDI-12, RS232 and RS485.
Flash Log holds over 300,00 readings and allows recording of status, water level data.
SDI-12 and RS232/RS485 interfaces provide data to loggers or communications equipment.
Dual Orifice CF Bubbler supports MODBUS protocol.
RS232 port supports a simple command line mode compatible with HyperTerminal and other communcations devices.
RS232 port also provides full access to setup, status and Bubbler data plus easy connection to a modem or radio.
Front panel for setting up operating parameters, monitoring performance, testing and examining the log.
Self-contained needing only external power and orifice tubing.
Long-life desiccant (1 year depending on local humidity and user set flow rate)
User-set bubble rate for each line to accommodate a variety of field conditions.
User-set configuration of single, dual orifice lices and extended range operation (-2 only)
Built-in, precision Accubar® sensor, accuracy 0-20ft. 0.01 ft, 20-57.5ft. 0.05% reading. 50 psi version’s accuracy 20-115.3ft. 0.05% reading.
User-configured averaging to filter out waves.
User-set auto purge to keep the outlet clear of debris. Sensors auto zero after purge to prevent sensor drift.
Redundant data storage when connected to an external logger.

Measurements	Two Stage/Level/Pressure measurements, Internal Temp, Battery. -3 version makes one stage/level/pressure measurement and one density measurement. Optional water temperature port.
Automeasure Interval	1 sec 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. -2 models have dual, independent accubar sensors for measuring 2 levels. -3 models have 1 accubar for level and 1 accubar for measuring the differential pressure (density)
Stage/Level/Pressure Range	25 psi, 57 ft, 17 meters; 50 psi, 115 ft,35 meters
Density Accuracy	0.1% (excluding orifice spacing error) (-3 model only)
Suspended Sediment	0 to 1,000,000 mg/L, accuracy +/- 500 mg/L with 2 ft separation of orifices.
Water Temperature Range (optional)	-5 C to + 45C
Water Temperature Accuracy (optional)	0.1°C
Measurement Technique	Platinum RTD (385 or 392), or Precision thermistor.
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″ tube based on model
Enclosure	Fiberglass NEMA-4, IP64, lockable
Communication Ports	SDI-12, RS232, RS485
Operating Temperature	-25°C to +60°C standard, -40°C to +60°C 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	no
Clock Accuracy	(at 0°C – 40°C)
Power Requirements	8 to 16 VDC
Max Current	4 amp for 25 psi unit, 8 amp for 50 psi
Average Current
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	15″ (38.1 cm)
Width	7.5″ (19.1 cm)
Weight	20 lbs. (9.1 kg)

Brochures
	Sutron-Dual-Orifice-Bubbler-Brochure-AUS-1.pdf	Download now
Manuals
	Constant-Flow-Bubblers-Manual.pdf	Download now
Additional files
	Sutron-Constant-Flow-Bubbler-Installation-Guide.pdf	Download now

Brochures