Exhibit 21

SUBSIDIARIES OF AMETEK, INC.

AS OF DECEMBER 31, 2011

Name of Subsidiary and name under which it does business	State or other jurisdiction  of incorporation or organization	Percentage of  voting securities owned by its immediate parent*
Advanced Measurement Technology, Inc.	Delaware		100	%
AMETEK (Bermuda), Ltd.	Bermuda		100	%
AMETEK Canada, LLC	Delaware		100	%
AMETEK Canada 1 ULC	Canada		100	%
AMETEK Canada 2 ULC.	Canada		100	%
AMETEK Canada Limited Partnership	Canada		100	%
AMETEK Cardinal, Inc.	Delaware		100	%
AMETEK Receivables Corp.	Delaware		100	%
AMETEK Thermal Systems, Inc.	Delaware		100	%
Avicenna Technology, Inc.	Minnesota		100	%
Chandler Instruments Company, L.L.C.	Texas		100	%
Grabner Instruments Messtechnik GmbH	Austria		100	%
Petrolab, L.L.C.	Delaware		100	%
Coining Holding Company	Delaware		100	%
Coining, Inc.	Delaware		100	%
Coining, B.V.	Netherlands		100	%
SEMX Corporation	Delaware		100	%
SPM (M) SDN. BHD	Malaysia		100	%
SPM Tape & Reel Industries (M) SDN.BHD	Malaysia		100	%
Semiconductor Materials SARL	Morocco		100	%
Controls Holding Corporation	Delaware		100	%
Patriot Sensors & Controls Corporation	Delaware		100	%
Drake Air, Inc.	Oklahoma		100	%
EDAX Inc.	Delaware		100	%
EDAX B.V.	Netherlands		100	%
Elgar Holdings, Inc.	Delaware		100	%
AMETEK Programmable Power, Inc.	Delaware		100	%
EMA Corp.	Delaware		100	%
Amekai (BVI), Ltd.	British Virgin Islands		50	%
AMETEK Advanced Industries, Inc.	Delaware		100	%
AMETEK Aerospace & Defense, Inc.	Delaware		100	%
AMETEK Ameron, LLC	Delaware		100	%
Southern Aero Partners, Inc.	Oklahoma		100	%
AMETEK Aircraft Parts & Accessories, Inc.	Delaware		100	%
AMETEK CPR RUSSIA, Inc.	Delaware		100	%
AMETEK Do Brasil Ltda.	Brazil		100	%
AMETEK Grundbesitz GmbH	Germany		100	%
AMETEK Haydon Kerk, Inc.	Delaware		100	%
Tritex Corporation	Delaware		100	%
Haydon Motion Europe S.A.R.L.	France		100	%
Haydon Linear Motors (Changzhou) Co., Ltd.	China		100	%
Haydon Kerk Motion Solutions, Inc.	Massachusetts		100	%
AMETEK HSA, Inc.	Delaware		100	%
AMETEK International C.V.	Netherlands		99	%
AMETEK Holdings B.V.	Netherlands		100	%

Name of Subsidiary and name under which it does business	State or other jurisdiction  of incorporation or organization	Percentage of  voting securities owned by its immediate parent*
AMETEK Denmark A/S	Denmark		100	%
AMETEK Holdings de Mexico, S. de R.L.	Mexico		50	%
AMETEK Latin America Holding Company S.à r.l.	Luxembourg		100	%
AMETEK Mexico Holding Company, LLC	Delaware		100	%
AMETEK Lamb Motores de Mexico,S.deR.L. de C.V.	Mexico		99.99	%
AMETEK Italia S.r.l.	Italy		100	%
AMETEK Europe L.L.C.	Delaware		100	%
AMETEK UK Limited Partnership	United Kingdom		99.998	%
AMETEK European Holdings Limited	United Kingdom		100	%
AMETEK Elektromotory, s.r.o	Czech Republic		99.97	%
AMETEK Singapore Private Ltd.	Singapore		100	%
Amekai Singapore Private Ltd.	Singapore		50	%
Amekai Meter (Xiamen) Co.,Ltd.	China		100	%
Amekai Taiwan Co., Ltd.	Taiwan		50	%
AMETEK Commercial Enterprise Shanghai	China		100	%
AMETEK Instruments India Private Ltd.	India		100	%
AMETEK Motors Asia Pte., Ltd.	Singapore		100	%
AMETEK Motors (Shanghai) Co., Ltd.	China		100	%
EMA Holdings UK Limited	England		100	%
AEM Limited	England		100	%
Aeromedic Innovations Ltd (Dormant)	England		100	%
Aviation Windings Ltd. (Dormant)	England		100	%
Aircontrol Technologies Ltd. (Dormant)	England		100	%
Airtechnology Holdings Ltd. (Dormant)	England		100	%
Airscrew Ltd. (Dormant)	England		100	%
AMETEK Airtechnology Group Ltd.	England		100	%
Airtechnology Pension Trustees Ltd	England		100	%
AMETEK Holdings (UK) Ltd. (Dormant)	England		100	%
OOO “AMETEK”	Russia		99	%
AMETEK Precision Instruments (UK) Ltd.	England		100	%
AMETEK Russia (UK) Ltd.	England		100	%
Land Instruments International Ltd.	England		100	%
AMETEK Material Analysis
Holdings GmbH	Germany		100	%
AMETEK Holdings SARL	France		74	%
Antavia SAS	France		100	%
CAMECA SAS	France		100	%
AMETEK Korea Co., Ltd.	Korea		100	%
CAMECA Instruments, Inc.	New York		100	%
CAMECA Taiwan Corp. Ltd.	Taiwan		100	%
CAMECA UK Ltd.	England		100	%
CAMECA GmbH	Germany		100	%
RETE Holding AG	Switzerland		100	%
EM Test (Switzerland) GmbH	Switzerland		100	%
EM Test (USA), Inc.	New Hampshire		100	%
EM Test GmbH	Germany		100	%
Lüthi Elektronik-Feinmechanik AG	Switzerland		100	%
SPECTRO Analytical
Instruments GmbH	Germany		100	%

Name of Subsidiary and name under which it does business	State or other jurisdiction  of incorporation or organization	Percentage of  voting securities owned by its immediate parent*
SPECTRO Analytical Instruments
(Asia-Pacific) Ltd.	Hong Kong		100	%
SPECTRO Analytical
Instruments, Inc.	Delaware		100	%
SPECTRO Analytical
Instruments (Pty). Ltd.	South Africa		100	%
SPECTRO Analytical UK Limited	England		100	%
Lloyd Instruments Ltd.	England		100	%
AMETEK SAS	France		63	%
Muirhead Aerospace Ltd.	England		100	%
Traxsys Input Products Ltd. (Dormant)	England		100	%
Norcroft Dynamics Ltd. (Dormant)	England		100	%
Solartron Instruments Ltd. (Dormant)	England		100	%
Taylor Hobson Holdings Ltd.	England		100	%
Taylor Hobson Overseas Ltd	England		100	%
AMETEK GmbH	Germany		62	%
AMETEK Nordic AB	Sweden		100	%
AMETEK Kabushiki Kaisha	Japan		100	%
AMETEK S.r.l.	Italy		100	%
Taylor Hobson Ltd.	England		100	%
Solartron Metrology Ltd.	England		100	%
Solartron Metrology 2001 Ltd.	England		100	%
Taylor Hobson, Inc.	Delaware		100	%
Taylor Hobson Trustees Limited	England		100	%
TH Acquisition Company Ltd. (Dormant)	England		100	%
EMA MX, LLC	Delaware		100	%
AMETEK Land, Inc.	Delaware		100	%
AMETEK Motors Hong Kong Ltd.	Hong Kong		100	%
AMETEK Precitech, Inc.	Delaware		100	%
AMETEK TSE, Inc.	Delaware		100	%
TSE Acquisition Corporation	Delaware		100	%
Technical Services for Electronics, Inc.	Minnesota		100	%
AMETEK VIS-K, Inc.	Delaware		100	%
Atlas Material Holdings Corporation	Delaware		100	%
Atlas Material Testing Technology L.L.C.	Delaware		100	%
Atlas Netherlands AcquisitionCo Coöperatief U.A.	Netherlands		99.99	%
Atlas Material Testing Technology GmbH	Germany		100	%
MTL Light Solutions GmbH	Germany		100	%
Atlas Material Testing Technology BV	Netherlands		100	%
Atlas Material Testing Technology (India)
Private Limited	India		100	%
Atlas Material Testing Technology Limited	England		100	%
MCG Acquisition Corporation	Minnesota		100	%
HCC Industries, Inc.	Delaware		100	%
AMETEK Ceramics, Inc.	Delaware		100	%
Glasseal Products, Inc.	New Jersey		100	%
Sealtron Acquisition Corp.	Delaware		100	%
Sealtron, Inc.	Delaware		100	%

Name of Subsidiary and name under which it does business	State or other jurisdiction  of incorporation or organization	Percentage of  voting securities owned by its immediate parent*
HCC Aegis, Inc.	Delaware		100	%
HCC Industries International	California		100	%
HCC Machining Co., Inc.	Delaware		100	%
Hermetic Seal Corporation	Delaware		100	%
Norfolk Avon Realty Trust (Dormant)	Massachusetts		100	%
HP Acquisition Corp	Delaware		100	%
Hamilton Precision Metals, Inc	Delaware		100	%
Hamilton Precision Metals of Delaware, Inc.	Delaware		100	%
KBA Holding, Inc.	Delaware		100	%
KBA Enterprises, Inc.	Delaware		100	%
Reading Alloys, Inc.	Pennsylvania		100	%
RAI Enterprises, Inc.	Delaware		100	%
NewAge Testing Instruments, Inc.	Pennsylvania		100	%
Reichert Holdings, Inc	Delaware		100	%
Reichert, Inc	Delaware		100	%
Reichert Instruments GmbH	Germany		100	%
Rotron Incorporated	New York		100	%
AMETEK Technical & Industrial Products, Inc.	Minnesota		51.9	%
SCPH Holdings, Inc.	Delaware		100	%
AMETEK SCP, Inc.	Rhode Island		100	%
AMETEK SCP (Barrow) Limited	England		100	%
Seiko EG&G Co. Ltd.	Japan		49	%
Solidstate Controls, LLC	Delaware		100	%
HDR Power Systems, LLC	Delaware		100	%
Solidstate Controls, Inc. de Argentina S.R.L.	Argentina		90	%
Solidstate Controls Mexico, S.A. de C.V.	Mexico		99.9	%
Technical Manufacturing Corporation	Massachusetts		100	%
Vision Research, Inc.	Delaware		100	%
Vision Research Europe B.V.	Netherlands		100	%
Vision Research Limited	England		100	%
Vision Research srl	Romania		100	%

* Exclusive of directors’ qualifying shares and shares held by nominees as required by the laws of the jurisdiction of incorporation.