MKS Instruments, Inc. provides instruments, subsystems, and process control solutions that measure, control, power, monitor, and analyze critical parameters of advanced manufacturing processes to improve process performance and productivity of advanced manufacturing processes. The company operates through four segments: Advanced Manufacturing Capital Equipment, Analytical Solutions Group, Europe Region Sales & Service, and Asia Region Sales & Service. It offers instruments and control systems, such as pressure measurement and control, materials delivery, and control products; and power and reactive gas products, including power delivery and reactive gas generation products used in semiconductor and other thin film applications, including solar and in medical imaging equipment applications. The company's vacuum products consist of vacuum technology products, including vacuum containment components, vacuum gauges, vacuum valves, effluent management subsystems and custom stainless steel chambers, vessels and pharmaceutical process equipment hardware, and housings. It also provides gas composition analysis products, such as mass spectrometry-based gas composition analysis instruments, and fourier transform infra-red based gas composition analysis products used in various industries, including the engine development, environmental emissions monitoring, air safety monitoring, and semiconductor industries. In addition, the company designs software products, including the design of experiment and analysis software for analyzing large and complex data sets focusing on manufacturing processes for the pharmaceutical, biotech, and other industries. Further, it builds precision machined components and electromechanical assemblies for the analytical instrument, scientific, semiconductor, and medical industries. MKS Instruments, Inc. was founded in 1961 and is headquartered in Andover, Massachusetts.