Prototype for chemical analysis and process intensification that is useful for research and teaching

Process intensification in chemical engineering needs small, sensitive, and modular tools that can watch micro‑total‑analysis systems (microTAS) and multiphase flows. This work tackles the demand for cheap, portable detectors by building a prototype that uses a Quartz Crystal Microbalance (QCM) with piezoelectric quartz crystals (PQC). The device works over a wide frequency range—from a few tens of kilohertz up to almost a gigahertz—and it can sense volatile organic‑compound (VOC) vapors, droplets, and suspended particles in gas streams. A notable part of the design is its modular layout, which lets it take simultaneous readings at five separate points. Those points can be spaced several centimeters apart, making it possible to map

concentration profiles or flow behavior. The paper shows that the prototype is portable, inexpensive, and capable of multi‑point sensing. However, it provides only limited data on long‑term stability in corrosive chemical environments and on how selectively it can detect complex VOC mixtures. Overall, the system offers a solid starting point for M.Tech students who want to explore sensor integration, signal processing, and spatial monitoring in intensified chemical processes.

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