EXHIBIT 21

SUBSIDIARIES OF
ESCO TECHNOLOGIES INC.

The following list omits certain of the Company’s subsidiaries which, if considered in the aggregate as a single subsidiary, would not constitute a “significant subsidiary” as defined in SEC Regulation S-X.

Name	State or Jurisdiction of Incorporation or Organization	Name(s) Under Which It Does Business
Aclara Technologies LLC	Ohio	Same; also Aclara Power Line Systems, Aclara RF Systems and Aclara Software
Beijing Lindgren ElectronMagnetic Technology Co., Ltd.	People’s Republic of China	Same; also ETS-Lindgren
Canyon Engineering Products, Inc.	California	Same
Crissair, Inc.	California	Same
Doble Engineering Company	Massachusetts	Same
Doble Lemke GmbH	Germany	Same
Doble PowerTest Limited	United Kingdom	Same
Doble TransiNor AS	Norway	Same
ESCO Finance International S.à r.l.	Luxembourg	Same
ESCO International Holding Inc.	Delaware	Same
ESCO Technologies Holding LLC	Delaware	Same
ETS Lindgren Engineering India Pvt. Ltd.	India	Same
ETS-Lindgren GmbH	Germany	Same
ETS-Lindgren Inc.	Illinois	Same; also Lindgren R.F. Enclosures and Acoustic Systems
ETS Lindgren Japan, Inc. (also known as ETS Lindgren Japan KK)	Japan	Same
ETS Lindgren Limited	United Kingdom	Same
ETS-Lindgren OY	Finland	Same
PTI Technologies Inc.	Delaware	Same
Thermoform Engineered Quality LLC	Delaware	Same
VACCO Industries	California	Same