MKS Instruments Announces First Quarter 2008 Earnings Conference Call

ANDOVER, Mass., April 3, 2008 /PRNewswire-FirstCall/ -- MKS Instruments, Inc. (Nasdaq: MKSI), a global provider of technologies that enable advanced processes and improve productivity, today announced that it will release first quarter 2008 financial results prior to market opening on Thursday, April 24, 2008. A conference call with management will be held the same day at 8:30 a.m. (Eastern Time). The call will be broadcast live and available for replay at www.mksinstruments.com. Dial-in numbers are 1-800-240-2430 for domestic callers and 303-262-2130 for international callers. A telephone replay can be accessed for one week at 303-590-3000, pass code 11111743#.

MKS Instruments, Inc. is a global provider of 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. Our products are derived from our core competencies in pressure measurement and control, materials delivery, gas composition and analysis, electrostatic charge management, control and information technology, power and reactive gas generation, and vacuum technology. Our primary served markets are manufacturers of capital equipment for semiconductor devices, and for other thin film applications including flat panel displays, solar cells, data storage media, and other advanced coatings. We also leverage our technology in other markets with advanced manufacturing applications including medial equipment, pharmaceutical manufacturing, and energy generation and environmental monitoring.

SOURCE MKS Instruments

CONTACT: Ron Weigner, Vice President and Chief Financial Officer of MKS
Instruments, +1-978-645-5500