    <SEC-DOCUMENT>0001193125-17-208164-index.html : 20170620
    <SEC-HEADER>0001193125-17-208164.hdr.sgml : 20170620
    <ACCEPTANCE-DATETIME>20170620160557
    ACCESSION NUMBER:		0001193125-17-208164
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		8
    CONFORMED PERIOD OF REPORT:	20170620
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20170620
    DATE AS OF CHANGE:		20170620

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MKS INSTRUMENTS INC
    		CENTRAL INDEX KEY:			0001049502
    		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823]
    		IRS NUMBER:				042277512
    		STATE OF INCORPORATION:			MA
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-23621
    		FILM NUMBER:		17920917

    	BUSINESS ADDRESS:
    		STREET 1:		2 TECH DRIVE
    		STREET 2:		SUITE 201
    		CITY:			ANDOVER
    		STATE:			MA
    		ZIP:			01810
    		BUSINESS PHONE:		978-645-5500

    	MAIL ADDRESS:
    		STREET 1:		2 TECH DRIVE
    		STREET 2:		SUITE 201
    		CITY:			ANDOVER
    		STATE:			MA
    		ZIP:			01810
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    <SEQUENCE>1
    <FILENAME>d414699d8k.htm
    <DESCRIPTION>FORM 8-K
    <TEXT>
    Document 1 - file: d414699d8k.htm

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    <FILENAME>d414699dex991.htm
    <DESCRIPTION>EX-99.1
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    <SEQUENCE>3
    <FILENAME>g414699ex99_1s1g1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <SEQUENCE>4
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    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <SEQUENCE>6
    <FILENAME>g414699ex99_1s4g1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g414699ex99_1s4g1.jpg

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    <SEQUENCE>7
    <FILENAME>g414699ex99_1s5g1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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