Exhibit 4(e)

                                             AMENDMENT NO. 1
                                                    TO
                                  AMENDED AND RESTATED CREDIT AGREEMENT


     This  Amendment  No.1 to  Amended  and  Restated  Credit  Agreement  (this
"Amendment") is entered into as of April 5, 2002, by and among ESCO Technologies
Inc., a Missouri corporation  ("Company"),  each financial institution signatory
hereto  as  a  Lender  (collectively  the  "Lenders"  and  individually  each  a
"Lender"),  and BANK OF  AMERICA,  N.A.,  as  Administrative  Agent,  Swing Line
Lender,   Offshore  Currency  Fronting  Lender  and  Issuing  Lender  ("Bank  of
America").

                                                 RECITALS

     A.  Company,  Bank of America  and the  Lenders  are party to that  certain
Amended and Restated Credit Agreement dated as of February 28, 2001 (the "Credit
Agreement").  Unless otherwise specified herein,  capitalized terms used in this
Amendment shall have the meanings ascribed thereto in the Credit Agreement.

     B. Company,  Bank of America and the undersigned  Lenders wish to amend the
Credit Agreement on the terms and conditions set forth below.

     NOW,  THEREFORE,  in consideration of the mutual execution hereof and other
good and valuable consideration, the parties hereto agree as follows:

     1.   Amendments to Credit Agreement.

          (a) The definition of "Letter of Credit Sublimit" appearing in Section
     1.01 of the Credit  Agreement  is hereby  amended by  inserting  the amount
     "$25,000,000"  in  replacement  for  the  amount  "$15,000,000"   appearing
     therein.

          (b)  Section  2.08(a) of the  Credit  Agreement  is hereby  amended by
     deleting the following sentence appearing therein:

          "Any such reduction or termination  shall be accompanied by payment of
          all accrued and unpaid  participation  fees under Section 2.10(d) with
          respect to the portion of the  Fronted  Offshore  Currency  Commitment
          being reduced or terminated."

          (c)  Section  2.08(c) of the Credit  Agreement  is hereby  amended and
     restated in its entirety as follows:

          " (c) Scheduled Commitment  Reductions.  In addition to any reductions
     pursuant to Section 2.08(b),  the combined  Commitments will be permanently
     reduced by  $5,000,000  (as such amount may be reduced by any  reduction in
     the applicable year pursuant to Section 2.08(a)) on each of April 11, 2002,
     April 11, 2003 and April 11, 2004. To the extent applicable,  Company shall
     make the prepayments required by Section 2.07(c) on such dates."

          (d)  Section  2.14(a) of the  Credit  Agreement  is hereby  amended by
     inserting the date "April 11, 2004" in replacement  for the date "April 11,
     2002" appearing therein.

     2.  Representations  and  Warranties  of Company.  Company  represents  and
     warrants that:

          (a)  The  execution,  delivery  and  performance  by  Company  of this
     Amendment have been duly authorized by all necessary  corporate  action and
     this  Amendment  is a  legal,  valid  and  binding  obligation  of  Company
     enforceable  against  Company in accordance  with its terms,  except as the
     enforcement  hereof  may  be  subject  to  the  effect  of  any  applicable
     bankruptcy, insolvency, reorganization, moratorium or similar law affecting
     creditors' rights generally;

          (b) Each of the representations and warranties contained in Section 5
     of the Credit Agreement is true and correct in all material respects on and
     as of the date hereof as if made on the date hereof; and

          (c) After  giving  effect to this  Amendment,  no  Default or Event of
     Default has occurred and is continuing.

     3. Effective Date. This Amendment shall become effective upon:

          (a) The execution and delivery hereof by Company,  Bank of America and
     the Lenders; and

          (b) Company's  payment to  Administrative  Agent,  for the  respective
     accounts of the Lenders pro rata  according  to their  respective  Pro Rata
     Shares, an amendment fee in an amount equal to four (4) Basis Points on the
     combined  Commitments.  Such amendment fee is for the Lenders  amending the
     Credit  Agreement as contemplated  hereby,  and is fully earned on the date
     paid. The amendment fee paid to the Lenders is solely for their own account
     and is nonrefundable.

     4. Reference to and Effect Upon the Credit Agreement.

          (a) Except as specifically  amended hereby,  the Credit  Agreement and
     the other  Loan  Documents  shall  remain in full  force and effect and are
     hereby ratified and confirmed; and

          (b) The execution,  delivery and effectiveness of this Amendment shall
     not operate as a waiver of any right, power or remedy of the Administrative
     Agent or any Lender under the Credit  Agreement or any Loan  Document,  nor
     constitute a waiver of any  provision  of the Credit  Agreement or any Loan
     Document.  Upon the effectiveness of this Amendment,  each reference in the
     Credit Agreement to "this Agreement",  "hereunder",  "hereof", "herein" or
     words of  similar  import  shall  mean  and be a  reference  to the  Credit
     Agreement as amended hereby.

     5.  Costs  and  Expenses.  Company  hereby  affirms  its  obligation  under
     Section 10.03 of the Credit Agreement to reimburse the Administrative Agent
     for all costs and expenses paid or incurred by the Administrative  Agent in
     connection  with the  preparation,  negotiation,  execution and delivery of
     this  Amendment,  including but not limited to the attorneys' fees and time
     charges of attorneys for the Administrative Agent with respect thereto.

     6.  GOVERNING  LAW. THIS  AMENDMENT  SHALL BE GOVERNED BY, AND CONSTRUED IN
     ACCORDANCE WITH, THE INTERNAL LAW OF THE STATE OF MISSOURI  (WITHOUT REGARD
     TO  CONFLICTS  OF LAW  PROVISIONS  THEREOF);  PROVIDED  THAT  COMPANY,  THE
     ADMINISTRATIVE  AGENT AND THE LENDERS SHALL RETAIN ALL RIGHTS ARISING UNDER
     FEDERAL LAW.

     7. Headings.  Section  headings in this  Amendment are included  herein for
     convenience  of  reference  only and  shall not  constitute  a part of this
     Amendment for any other purpose.

     8.  Counterparts.   This  Amendment  may  be  executed  in  any  number  of
     counterparts,  each of which when so  executed  shall be deemed an original
     but all such counterparts shall constitute one and the same instrument.

                                         [signature pages follow]




          IN WITNESS WHEREOF, the parties have executed this Amendment as of the
     date and year first above written.


                    ESCO TECHNOLOGIES INC.
                    By: Name: Title:




                    BANK OF AMERICA, N.A., as Administrative Agent
                    By: Name: Title:



                    BANK OF AMERICA, N.A., as Lender, Issuing Lender, Swing Line
                    Lender and Offshore Currency Fronting Lender
                    By: Name: Title:


                    BANK ONE, NA (Main Office Chicago), as a Lender
                    By: Name: Title:


                    THE NORTHERN TRUST COMPANY, as a Lender
                    By: Name: Title:


                    LASALLE BANK NATIONAL ASSOCIATION, as a Lender
                    By: Name: Title:


                    COMMERCE BANK, N.A., as a Lender
                    By: Name: Title: