There are different standards and standards that classify areas in certain industries or spaces where particle contamination must be minimal to ensure the correct and safe production of a given product. Industries such as the manufacture of drugs require certain certification of clean area according to the process they have to ensure the safety of the product, ie there is no possibility that this product may have any contamination or a biological agent that affects the final consumer. Similarly in other industries such as cosmetics, circuit manufacturing, surgery rooms among others it is necessary to comply with certain minimum parameters that ensure that there is no contamination in the environment and that this is effectively controlled production process. Standards such as ISO 14644 are the most common guide for classification of clean rooms / rooms and other controlled environments, this guide indicates according to the type of classification you want to achieve how many particles per unit volume in various fractions should be monitored and measures, as well as what minimum levels of concentration are required to be able to classify said environment as a controlled environment or a clean room. The particle counters are instruments that allow to quantify immediately and quickly if an environment is complying with its classification, delivering the levels of concentration of particles in different size fractions and indicating if the parameters that ensure adequate control of said ambient.