MKS Instruments, Inc. provides instruments, subsystems, and process control solutions to measure, control, power, monitor, and analyse parameters of manufacturing processes. It operates through the Vacuum & Analysis; Light & Motion and Equipment & Solutions segments. The Vacuum and Analysis segment comprises pressure measurement and control, flow measurement and control, gas and vapor delivery, gas composition analysis, residual gas analysis, leak detection, control technology, ozone generation and delivery, RF & DC power, reactive gas generation, and vacuum technology components. The Light and Motion segment includes lasers, photonics, sub-micron positioning, vibration control, and optics instruments. The Equipment & Solutions segment provides laser-based manufacturing systems solutions for the micro-machining industry that enable customers to optimize production. The company was founded in 1961 and is headquartered in Andover, MA.