The ABS Acoustic Bubble Spectrometer (ABS) measures bubble size distributions and void fractions in gas/liquid mixtures. The ABS can be used in a wide variety of applications wherever the information of the bubble population is needed, such as field, laboratory, and industrial multi-phase flows in cavitation studies, oceanography, chemical, and petroleum engineering, biological media, … etc.


 Hardware-wise, customers have several options to choose an ABS system based on their application and budget. For example, a high-speed data sampling rate up to 100 MS/s is available, which is 10 times faster than previous offering and is capable of expanding the bubble detection limit to the sub-micron range. For industrial and field applications, rugged ABS systems based on module PXI system are also available.


The data analysis in the ABS incorporates the latest developments stemming from the past few years of research. The high-end data acquisition card and signal analysis algorithm has enabled the ABS to perform measurements with significantly improved temporal resolutions. Recent R&D efforts have also enabled the ABS to measure bubbles in non-traditional bubbly media such as biological tissue, mercury, and food (whipped cream and syrup), fresh concrete. All improvements were subjected to rigorous testing and validation against optical measurements (high-speed photography and laser scattering) for a range of conditions and bubble sizes.