MKS Instruments Announces Third Quarter 2011 Earnings Conference Call

ANDOVER, Mass., Sept. 28, 2011 (GLOBE NEWSWIRE) -- MKS Instruments, Inc.
(Nasdaq:MKSI), a global provider of technologies that enable advanced processes
and improve productivity, today announced that it will release third quarter
2011 financial results after market close on Wednesday, October 19, 2011. A
conference call with management will be held on Thursday, October 20, 2011 at
8:30 a.m. (Eastern Time). To participate in the conference call, please dial
(877) 212-6076 for domestic callers and (707) 287-9331 for international
callers, and an operator will connect you. Participants will need to provide the
operator with the Conference ID of 11366013, which has been reserved for this
call. A live and archived webcast of the call will be available on the
company's website at www.mksinst.com.

About MKS Instruments

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.

CONTACT: Seth H. Bagshaw
Vice President, Chief Financial Officer & Treasurer
(978) 645-5578