Technology Particle counters function primarily using the principles of light scattering, although other technologies may also be employed. Light scattering by particles use instrumentation comprising a high-intensity light source (a laser), a controlled media flow (air, gas or liquid) and highly sensitive light-gathering detectors (a photo detector). Laser optical particle counters employ five major systems: 300px|Diagram of a particle counter1. Lasers and optics: A laser operates on a single wavelength, so the light source is consistent with constant power output to illuminate the particle sampling region. Detection methods 300px|Diagram of a particle counter 300px|Diagram of a vision-based particle counterThere are several methods used for detecting and measuring particle size or size distribution — light blocking (obscuration), light scattering, Coulter principle and direct imaging. A high intensity light source is used to illuminate the particle as it passes through the detection chamber.
Technology 300px|Diagram of a particle counterParticle counters function primarily using the principles of light scattering, although other technologies may also be employed. Light scattering by particles use instrumentation comprising a high-intensity light source (a laser), a controlled media flow (air, gas or liquid) and highly sensitive light-gathering detectors (a photo detector). Laser optical particle counters employ five major systems: 1. Lasers and optics: A laser operates on a single wavelength, so the light source is consistent with constant power output to illuminate the particle sampling region. Detection methods 300px|Diagram of a vision-based particle counterThere are several methods used for detecting and measuring particle size or size distribution — light blocking (obscuration), light scattering, Coulter principle and direct imaging. A high intensity light source is used to illuminate the particle as it passes through the detection chamber.
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