WASHINGTON, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

         Date of Report (Date of earliest event reported): May 10, 2005

                             ESCO TECHNOLOGIES INC.
               (Exact Name of Registrant as Specified in Charter)

Missouri                              1-10596                         43-1554045
(State or Other                       (Commission               (I.R.S. Employer
Jurisdiction of Incorporation)        File Number)           Identification No.)

           8888 Ladue Road, Suite 200, St. Louis, Missouri 63124-2056
               (Address of Principal Executive Offices) (Zip Code)

        Registrant's telephone number, including area code: 314-213-7200


Today,  May 10, 2005, the Registrant is issuing a press release (Exhibit 99.1 to
this report)  announcing its fiscal 2005 second quarter  financial and operating
results. See Item 7.01, Regulation FD Disclosure below.


Today,  the  Registrant  is issuing a press release  announcing  its fiscal 2005
second quarter financial and operating results.  This press release is furnished
herewith as Exhibit 99.1 and will be posted on the Registrant's  website located
at  http://www.escotechnologies.com.  It can be  viewed  through  the  "Investor
Relations"  page of the website  under the tab "Press  Releases,"  although  the
Registrant reserves the right to discontinue that availability at any time.


The press release furnished  herewith contains  financial measures and financial
terms not calculated in accordance with generally accepted accounting principles
in the United  States of America  ("GAAP")  in order to  provide  investors  and
management with an alternative  method for assessing the Registrant's  operating
results  in a manner  that is  focused on the  performance  of the  Registrant's
ongoing  operations.  The  Registrant  has  provided  definitions  below for the
non-GAAP  financial  measures  utilized in the press  release,  together with an
explanation of why management uses these measures,  and why management  believes
that  these  non-GAAP  financial  measures  are useful to  investors.  The press
release uses the non-GAAP  financial  measures of  "operational"  net  earnings,
earnings per share and results of operations,  as well as "EBIT from  continuing
operations,"  "EBIT  margin,"  "operational"  EBIT margin,  "free cash flow from
continuing operations" and Filtration segment "operational" EBIT.

The  Registrant  defines  "operational"  net earnings,  earnings per share,  and
results of  operations  as net  earnings,  earnings  per share,  and  results of
operations in accordance  with GAAP,  except for the exclusion of (i) exit costs
and severance  charges  related to the shutdown and relocation of the Filtration
segment  Puerto  Rico  facility,  and (ii) the  results of  operations  from the
MicroSep  businesses  which  were  divested  in  fiscal  2004  and are  shown as
"discontinued  operations" in fiscal 2004. The Registrant defines  "operational"
EBIT margin as EBIT margin  (defined below) with the foregoing  exclusions.  The
Registrant's  management  uses these "operational"  results in  evaluating  the
measures of  continuing  operations  of the  Registrant  and believes  that this
information  provides  investors  with  additional  insight into the period over
period financial performance of the Registrant.

The Registrant  defines "EBIT from  continuing  operations"  as earnings  before
interest and taxes. The Registrant defines "EBIT margin" as EBIT from continuing
operations as a percent of net sales. The Registrant's  management evaluates the
performance of its operating  segments based on EBIT from continuing  operations
and EBIT margin,  and believes  that EBIT from  continuing  operations  and EBIT
margin are useful to investors to demonstrate the operational  profitability  of
the Registrant's  business segments by excluding  interest and taxes,  which are
generally  accounted for across the entire  Registrant on a consolidated  basis.
EBIT from  continuing  operations is also one of the measures used by management
in  determining   resource  allocations  within  the  Registrant  and  incentive

The Registrant defines "Free cash flow from continuing  operations" as "Net cash
provided  by   operating   activities-continuing   operations"   less   "Capital
expenditures-continuing  operations." The Registrant's  management believes that
free cash flow from continuing  operations is useful to investors and management
as a supplemental  financial  measurement in the evaluation of the  Registrant's
business and  believes  that free cash flow may provide  additional  information
with  respect  to the  Registrant's  ability to meet its  future  debt  service,
capital expenditures and working capital  requirements.  Free cash flow can also
be reinvested in the Registrant for future growth.

The Registrant defines  Filtration  segment  "operational" EBIT as segment EBIT,
excluding the costs related to the shutdown of the Puerto Rico facility.

The  presentation of the  information  described above is intended to supplement
investors'   understanding  of  the  Registrant's  operating  performance.   The
Registrant's  non-GAAP  financial  measures  may  not  be  comparable  to  other
companies' non-GAAP financial performance measures.  Furthermore, these measures
are not  intended  to replace net  earnings,  cash  flows,  financial  position,
comprehensive  income  (loss),  or any other measure as determined in accordance
with GAAP.


(c)  Exhibits

Exhibit No.       Description of Exhibit

    99.1          Press Release dated May 10, 2005


The information  contained in this report,  including Exhibit 99.1, shall not be
deemed to be "filed" for purposes of Section 18 of the  Securities  Exchange Act
of 1934 as amended  ("Exchange Act") or otherwise  subject to the liabilities of
that section,  unless the Registrant  incorporates it by reference into a filing
under the Securities Act of 1933 as amended or the Exchange Act.


     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                                        ESCO TECHNOLOGIES INC.

Dated:  May 10, 2005                                    By:  /s/G.E. Muenster
                                                        G.E. Muenster
                                                        Vice President and
                                                        Chief Financial Officer

                                  EXHIBIT INDEX

Exhibit No.                     Description of Exhibit

    99.1          Press release dated May 10, 2005