EXHIBIT 21 SUBSIDIARIES OF AMETEK, INC. STATE OR OTHER JURISDICTION OF PERCENTAGE OF VOTING NAME OF SUBSIDIARY AND NAME INCORPORATION OR SECURITIES OWNED BY ITS UNDER WHICH IT DOES BUSINESS ORGANIZATION IMMEDIATE PARENTS* - ---------------------------- ------------------------------ ----------------------- Advanced Measurement Technology, Inc Delaware 100% AMEKAI (BVI), Ltd British Virgin Islands 50% AMELON, Inc. Delaware 100% AMETEK (Bermuda), Ltd Bermuda 100% AMETEK (Canada), Ltd Canada 100% AMETEK (FSC), Inc. U. S. Virgin Islands 100% AMETEK GmbH Germany 100% AMETEK Precision Instruments Europe GmbH Germany 100% AMETEK IMTSA, S.A. de C.V. Mexico 100% AMETEK Lamb Motores de Mexico, S.A. de C.V. Mexico 100% AMETEK Mexicana, S.A. Mexico 100% AMETEK Motors Holding, Inc Delaware 100% AMETEK Precision Instruments France, SARL France 100% AMETEK Precision Instruments (UK) Ltd. England 100% AMETEK Receivables Cop Delaware 100% EDAX Inc. Delaware 100% TSL Inc. Utah 100% EDAX Japan K.K. Japan 100% EDAX B.V. Netherlands 100% EDAX Ltd. England 100% EMA Corporation Delaware 100% AMETEK Do Brasil Ltda. Brazil 100% AMETEK Holdings B.V. Netherlands 100% AMETEK Denmark A/S. Denmark 100% AMETEK Elektomotory CR S.R.O. Czech Republic 100% AMETEK (Italia) S.r.l. Italy 100% AMETEK Singapore Private Ltd. Singapore 100% AMETEK Motors Hong Kong Ltd. Hong Kong 100% Amekai Singapore Private Ltd. Singapore 50% Amekai Meter (Xiamen) Co., Ltd. China 100% AmeKai Taiwan Co., Ltd. Taiwan 50% AMETEK Motors Asia Private Ltd. Singapore 100% AMETEK Motors (Shanghai) Co., Ltd. China 100% AMETEK Holdings (UK) Ltd. England 100% Lloyd Instruments Ltd. England 100% Lloyd Instruments S.A. France 100% Neue Elektromotoren GmbH - Schleusingen Germany 100% WEBAK, B.V. Netherlands 100% John Chatillon & Sons, Inc. New York 100% Rotron Incorporated New York 100% NCC Holdings, Inc. Delaware 100% AMETEK National Controls Corporation Delaware 100% Controls Holding Corporation Delaware 100% Patriot Sensors & Controls Corporation Delaware 100% Nihon Drexelbrook Co., Ltd. Japan 100% Prestolite Asia Ltd. Korea 50% Seiko EG&G Co. Ltd. Japan 49% * Exclusive of directors' qualifying shares and shares held by nominees as required by the laws of the jurisdiction of incorporation.