High resolution size differentiation

CASY counting principle

The CASY counting principle is based on ISO 13319, the international standard reference method for particle counting.


In addition, the system features “Pulse Area Analysis”, an advanced method for digital pulse processing. This technique is used to maximize the information gained from the signals created when a cell or particle passes through the system’s high precision measuring pore in a low voltage field (see Figure).


Each object is scanned with a frequency of one million measurements per second, resulting in up to several hundred readings per cell. Thus, the complete time course of the signals is studied when analysing samples. Pulse Area Analysis provides a high-resolution recording of cell size distribution, ensuring that the size of every particle passing through the measuring pore is accounted for.