EXHIBIT 21

SUBSIDIARIES OF
ESCO TECHNOLOGIES INC.

	STATE OR JURISDICTION OF
	INCORPORATION	NAME UNDER WHICH
NAME	OR ORGANIZATION	IT DOES BUSINESS
Beijing Lindgren ElectronMagnetic Technology Co., Ltd.	People’s Republic of China	Same
Comtrak Technologies, L.L.C.	Missouri	Same
Distribution Control Systems Caribe, Inc.	Puerto Rico	Same
Distribution Control Systems, Inc.	Missouri	Same
ESCO Technologies Holding Inc.	Delaware	Same
ETS-Lindgren, L.P.	Texas	Same and Acoustics Systems
ETS-Lindgren Japan, Inc.	Japan	Same
ETS-Lindgren Limited	England	Same
ETS-Lindgren OY	Finland	Same
Hexagram, Inc.	Ohio	Same
Lindgren R.F. Enclosures, Inc.	Illinois	Same and ETS-Lindgren
Nexus Energy Software, Inc.	Massachusetts	Same
PTI Technologies Inc.	Delaware	Same
TekPackaging LLC	Delaware	Same
VACCO Industries	California	Same