Particle size analysis is used across many areas of science, including, life sciences, food testing, and pharmaceuticals. Particle size analyzers are used to measure the size of small particles, such as powders used to make foods and pharmaceutical preparations to nano materials. Particle size is important as it plays a key role in the amount of chemical reaction required when the product is being used. For example, inhaled drug manufacturers must ensure their product is small enough in size to penetrate the lungs so the medication can effectively be delivered to the patient.