Measuring particle size in running processes - Parsum stands for this since over 20 years with its own complete solutions.Founded in 1997 by former employees of Chemnitz University of Technology, Parsum has now become a recognized international supplier of PAT solutions for the chemical and pharmaceutical industries. At the beginning was a patented measuring principle and the conviction that there is a great need in industry and R&D to measure particle sizes directly in the process to monitor, control and optimize these processes.From the beginning, Parsum used the in-line measurement, where particles do not have to leave the process space and the measurement results are available immediately and continuously. Several patents were granted for this procedure in Germany, Europe and the USA.The Parsum Probe design without mechanically adjustable parts has become an important success factor and has been maintained up to today's probe types. As a result, installation in existing systems is easily possible.In addition to the fine chemicals, food and basic industries, with the IPP 70- probe type Parsum offers a GMP-compliant solution for the pharmaceutical industry. Above all, the consistent development of accessories for particle dispersion and process adjustment, the so-called "Process Interface"​, led to Parsum becoming a market leader in the field of particle measurement in fluidized bed processes. The unique Inline dispersing technology in particular contributed to the fact that the measuring probes can also determine the particle size distribution in very dense, moist and dusty processes.Parsum is thus in a very good position for future business. In addition to the general trend towards "Industry 4.0"​ this is promoted in the pharmaceutical industry mainly by the increasing direct integration of PAT into new production facilities and a growing trend towards continuous production processes.