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Bubble point test is a non-contaminating, non-destructive filter integrity test that is commonly used to evaluate structural integrity as well as filtration rating during both filter product design and quality control.  By immersing a filter into solution and slowly raising the gas pressure on one side, filter pore size can be determined based on the pressure point where bubbles appear.


Turn-Key Filter Integrity Testers

Whether you would like a system that is completely manual, fully automatic, or something in between, Genuen engineers are ready to go to work on your custom test environment.

Because we use commercial-off-the-shelf hardware and software, Genuen systems are highly configurable and scalable.  Our past projects have featured:

  • Adherence to ARP901A Bubble-Point Test Method and ISO 2942 standards
  • Class I, Division 1-rating for hazardous materials and combustible fluids
  • High precision sensors and regulators
  • Detailed data collection and reporting on any aspect of the application

Bubble Point Tester - Side ViewBubble Point Tester - Top View


How Genuen Helps

Our engineering staff  has been creating highly configurable test rigs featuring all sorts of electromechanical and servo-hydraulic interfaces since 1991.

Talk to an experienced test consultant today to find out how we can collaborate together to make your bubble point test system a reality.


What considerations should be taken into account when choosing a specific test fluid?
Test fluids can include water, Isopropyl Alcohol, Ethyl Alcohol (Ethanol), aviation fuel (JP-5), hydraulic fluid, PAO fluids, and cleaning solvents.  The choice of test fluid in a Bubble-Point Test System is driven by factors such as the type of product being tested, end fluid used, test specification requirements, system components such as the reservoir, and considerations around minimizing contamination and addressing volatility of the chosen fluid, especially when dealing with potentially explosive vapors.
What are the pros and cons of a manually-operated system?
Manually-operated systems require a technician to mount the DUT, submerge it into the test fluid, and slowly increase pressure with a knob.  Manual systems can make sense where control accuracy and recording test conditions are not high priorities, where there is high variability in the kinds of tests being performed, or where a simple go/no-go result is desired.  Simpler requirements make these systems popular in smaller MRO facilities.  Additionally, technicians can create novel tests on-the-fly by turning knobs however makes sense in the moment.
When should I consider a PLC-based system?
PLC-based systems offer automation in clamping, submersion, rotation, and pressure increase, improving accuracy and repeatability over manual systems.  PLC-based systems feature a simple HMI (Human Machine Interface) screen, do not typically record data at rates faster than 10 Samples/s, and can make sense when types of test are limited (usually to 1 test), are highly repeatable, and do not require high-speed data acquisition.
What are the advantages of a Real-Time, PC-based system?

Real-Time PC-based systems offer faster control and sampling rates (via the Real-time system) and more advanced user interfaces (via the PC).  In addition to faster sampling, which enables better control, measurement resolution is typically better as well.  For example, 16-bit measurements are sixteen times better than 12-bit readings.  Real-time control means fast response times, and for bubble-point, systems may include automatic bubble stream sensing.  Sampling rates can exceed 10,000 Samples/s per channel.  Advanced user interfaces offer virtually unlimited test profiles, which can be pre-defined and uploaded.  Lastly, advanced user interfaces typically include a “manual control screen” for operating the equipment as if it were in manual mode.

Ready to Get Started?

Learn more about our products or request a consultation with an experienced engineer.