Particle Counting

A particle counter instrument detects and counts particles. By its very nature a particle counter is a single particle counter, meaning it detects and counts particles one at a time. The nature of particle counting is based upon either light scattering, light obscuration, or direct imaging. A high energy light source is used to illuminate the particle as it passes through the detection chamber. The particle passes through the light source (typically a laser or halogen light) and if light scattering is used, then the redirected light is detected by a photo detector. If direct imaging is used, a halogen light illuminates particles from the back within a cell while a high definition, high magnification camera records passing particles. Recorded video is then analyzed by computer software to measure particle attributes. If light blocking (obscuration) is used the loss of light is detected. The amplitude of the light scattered or light blocked is measured and the particle is counted and tabulated into standardized counting bins. 

We offer a variety of products for calibrating and validating many types of particle counters based on various principles. These especially include laser particle counters for single particle light scattering and light obscuration.


Air Particle Counters
3K and 4K-particle-counter-size-standards
Dri-Cal-particle-size-standard
3000-series-nanosphere-size-standards-20-to-1000nm
4000-series-microsphere-size-standards-1-1000um
8000-series-silica-size-standards-05-20nm
9000-series-glass-size-beads

Liquid Particle Counters
2000-series-uniform-polymer-microspheres-2-40um
3K and 4K-particle-counter-size-standards 
3000-series-nanosphere-size-standards-20-to-1000nm
4000-series-microsphere-size-standards-1-1000um
Count-cal-precision-standards  
Ezy-cal--count-precision-size-standards
Pharm-trol-count-precision-size-standards                                                                                                                          

Optical Particle Counters
3K and 4K-particle-counter-size-standards 
3000-series-nanosphere-size-standards-20-to-1000nm
4000-series-microsphere-size-standards-1-1000um
Dri-cal-particle-size-standard
Ezy-cal--count-precision-size-standards
Pharm-trol-count-precision-size-standards

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