EXHIBIT 21

SUBSIDIARIES OF

ESCO TECHNOLOGIES INC.

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 Electron Magnetic Technology Co., Ltd.	People’s Republic of China	Same; also ETS-Lindgren
Crissair, Inc.	California	Same
Distribution Control Systems Caribe, Inc.	Puerto Rico	Same; also Aclara Technologies
Doble Engineering Company	Massachusetts	Same
Doble Lemke AG	Switzerland	Same
Doble Lemke GmbH	Germany	Same
Doble PowerTest Limited	United Kingdom	Same
Doble TransiNor AS	Norway	Same
EMV Elektronische Messgeräte Vertriebs-GmbH	Germany	Same
ESCO Technologies Holding LLC	Delaware	Same
ETS Lindgren Engineering India Private Limited	India	Same
ETS Lindgren Japan, Inc.	Japan	Same
ETS Lindgren Limited	United Kingdom	Same
ETS-Lindgren, L.P.*	Texas	Same; also Acoustic Systems
ETS-Lindgren OY	Finland	Same
Lindgren R.F. Enclosures, Inc.*	Illinois	Same; also ETS-Lindgren and Acoustic Systems
PTI Technologies Inc.	Delaware	Same
Thermoform Engineered Quality LLC	Delaware	Same
VACCO Industries	California	Same

* Effective October 1, 2012, ETS-Lindgren, L.P. was merged into Lindgren R.F. Enclosures, Inc., which simultaneously changed its corporate name to ETS-Lindgren Inc.