MKS Instruments Announces First Quarter 2011 Earnings Conference Call

ANDOVER, Mass., April 5, 2011 /PRNewswire via COMTEX/ --

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 2011 financial results after market close on Wednesday, April 20, 2011. A conference call with management will be held on Thursday, April 21, 2011 at 8:30 a.m. (eastern time). The call will be broadcast live and available for replay at www.mksinst.com. Dial-in numbers are 1 (877) 941-2332 for domestic callers and 1 (480) 629-9722 for international callers. A telephone replay can be accessed for one week at 1 (303) 590-3030, access code 4425390#.

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 analysis, 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, light emitting diodes, data storage media, and other advanced coatings. We also leverage our technology in other markets with advanced manufacturing applications including medical equipment, pharmaceutical manufacturing, energy generation, and environmental monitoring.

SOURCE MKS Instruments, Inc