Bubble Flow Meter Rentals

Requiring nothing but tubing to be inserted into the stream, these bubble flow meter rental instruments are an excellent solution for open channel flow measurements in the presence of debris or chemicals.

ISCO 4230

Bubble Flow Meter

ISCO 4230

The ISCO 4230 determines flow rate with nothing but tubing inserted into the channel by measuring the pressure required to force air bubbles through the tubing to obtain a depth reading. This depth measurement is in turn used with the channel’s dimensions to allow the 4230 to accurately report flow rate. Our bubble flow meter rentals are available with multiple power options for sites with or without AC power. They also feature advanced datalogging, a built in printer, and can interface with various other probes for logging multiple parameters.

0.01 to 10 feet
Accuracy ±0.005′ @ < 1′
Accuracy ±0.01′ @ < 5′
Accuracy ±0.035
Temperature (optional)
32 to 176°F
0 to 80°C
Accuracy ±1.8°F or ±1°C
pH (optional)
0 to 14 pH
Accuracy ±0.1%
Rain guage (optional)
Resolution 0.01 or 0.004 inches
  • Calculates flow based on level measurements
  • Built in flow conversions for most applications
  • User definable parameters for unique situations
  • Easy to configure
  • Rugged design for harsh outdoor environments
  • Multiple power options
  • Bubble measurement technique is immune to corrosive chemicals
  • Resitant to damage from debris or lightning
  • Built in printer plots up to 3 lines of data
  • Summary reports printed on demand or at scheduled intervals
  • Can control an ISCO sampler
  • Programmable sampler activation conditions
  • Optional pH and temperature sensors
  • Can be interfaced to a YSI sonde for pH, temp, DO, and salinty measurements
  • Rainguage input
  • Datalogging
  • PC interface
  • Advanced PC software
  • 3 Analog outputs
  • 2 programmable relay outputs
  • Digital output
  • LCD display
  • Datalogging points 40,000
  • PC interface RS232
  • Digital output RS232
  • Analog outputs 4 to 20 mA or 0 to 20 mA
  • Relay outpus form C
  • Input power rechargeable battery, 12 to 14 VDC, and 115 VAC
  • Runtime up to 90 days
  • Operating temperature 0 to 140°F
  • IP rating 65
  • NEMA 4X enclosure
  • Dimensions 15.5″ x 11.5″ x 10.5″
  • Weight 19.1 lbs
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  • Water Flow
  • Bubble Flow Meters
  • ISCO 4230

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