The Laser Obscuration is a straight-forward technique for determining particle size distribution (0.1 - 3,600 microns), without any assumptions or sample pre-knowledge.
A focused laser beam rotates in a constant high frequency and interacts with particles within the sample medium.
Each scanned particle obscures the laser beam, and a photo diode measures the actual time of obscuration.
The time of obscuration directly relates to the particle's Diameter, by a simple calculation principle of multiplying the known beam rotation Velocity in the directly measured Time of obscuration, (D=V*t).
The benefit of measuring time (unlike other material properties) is its "sterile nature" as an analytical variable, meaning it is not affected by any physical or chemical property of the particle or its medium; therefore, it provides reliable analysis results for a wide variety of materials, where other common techniques cannot overcome physical or chemical limitations.
State-Of-The-Art software analyses the obscuration time as multiple pulses algorithm complex, providing within seconds clear and accurate results of the sampled particles size distribution.
The real-time sample visualization capabilities importantly allow its users to easily eliminate unwanted analytical results due to irrelevant and/or unwanted fractions in the sample: "Seeing Is Believing"!!!