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                                                                    Exhibit 23.2

                       CONSENT OF INDEPENDENT ACCOUNTANTS

     We hereby consent to the incorporation by reference in the Registration
Statements on Form S-8 (No. 333 - 78069, 333 - 78071, 333 - 78073, 333 - 31224)
of MKS Instruments, Inc. of our report dated January 28, 2000 relating to the
financial statements, which appears in the Annual Report to Shareholders, which
is incorporated in this Annual Report on Form 10-K. We also consent to the
incorporation by reference of our report dated January 28, 2000 relating to the
financial statement schedules, which appears in this Form 10-K.

PricewaterhouseCoopers LLP


Boston, Massachusetts
March 27, 2000


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