Abstract: This article discusses the development of virtual quality analyzers for the advanced process control system of the reactor unit of
the pentane hexane isomerization unit. For this purpose, auxiliary calculations were made, mathematical models were built, and
virtual quality analyzers were implemented in the software product. The characteristics of the developed virtual quality analyzers and
the results of preliminary construction of virtual analyzers in the Honeywell software are demonstrated. Step-by-step testing,
construction and debugging of dynamic models, configuration of basic regulation are given.
Index terms: virtual analyzers, mathematical model, dynamic model.