Comparing particle counters. Cost vs. reproducibility

Particle counters are used in evaluating particle concentrations in liquids and gases and on surfaces. Even for the same purpose, several types are commercially available. Many factors will go into a decision about which to buy. These include upper and lower particle size detection limits; particle size subdivisions; data display, communication, and analysis capabilities; ease of use; reliability; accuracy; reproducibility (precision); and cost. A method is presented to allow comparisons based on reproducibility of measurements and cost.