Document:

Exhibit 10.1

                      SEPARATION AGREEMENT

     This  Separation  Agreement (the "Agreement")  is  made  and
entered  into  by  and between Innovo Group Inc.  ("Innovo")  and
Samuel   J.   Furrow,   Jr.  ("Executive")   (collectively,   the
"Parties"),  to be effective as of January 20, 2006 ("Termination
Date").

                            RECITALS

A.   WHEREAS, as of the effective date of this Agreement, Innovo
employs Executive pursuant to an at-will employment relationship.

B.   WHEREAS, Innovo and Executive acknowledged  the termination
of the services of Executive's  employment with  Innovo, and its
subsidiaries,pursuant to the at-will employment arrangement (the
"Employment Relationship") and in  connection  therewith, Innovo
has agreed to extend to Executive certain payments of  severance
benefits and continuation of benefits.

C.   WHEREAS, in  connection with the payment of these benefits,
each agrees to release the other,  in  accordance with the terms
and provisions herein, from any and all obligations, liabilities
and claims arising from or in any way related to  the employment
arrangement, the termination thereof or otherwise.

     NOW  THEREFORE,  for  good and valuable  consideration, the
receipt  and  sufficiency of which are hereby  acknowledged, the
Parties hereto acknowledge, agree and covenant as follows:

                            AGREEMENT

     1.    Termination.  The Parties hereto agree that Innovo has
terminated the services of Executive from his position  as  Chief
Executive Officer and that the Employment Relationship  shall  be
deemed  terminated  as of the effective date of  this  Agreement.
This Agreement is made with the mutual and express intent of  the
Parties to extinguish all obligations and liabilities imposed  on
either  of  them  by  the Employment Relationship  or  otherwise,
except  as specifically set forth herein.  Innovo agrees that  it
will   not  oppose  any  claim  for  unemployment  benefits  that
Executive  may file with any governmental agency as a  result  of
the  termination of the Employment Relationship pursuant to  this
Agreement.

     2.   Severance Benefits. In return for Executive's execution
of  and adherence to this Agreement, including the releases  that
form  a  material  part of this Agreement, Innovo  shall  provide
Employee  with certain benefits, including benefits to  which  he
would not otherwise be entitled:

          (a)    Salary   Continuation.      Innovo   shall   pay
Executive  his  aggregate regular salary  in  effect  as  of  his
Termination  Date, in the amount of One Hundred Thousand  Dollars
($100,000.00)  in four equal installments for a total  amount  of
Four  Hundred  Thousand  Dollars  ($400,000.00)  to  be  paid  on
February  3,  2006, March 3, 2006, March 31, 2006 and  April  28,
2006,  all  of which are Innovo's regular paydays, and  shall  be
subject  to  usual and customary deductions required by  law  and
Innovo  policy.   In the event of Executive's  death  before  the

<PAGE 1>

completion of all payments, any remaining payments due under this
paragraph shall be paid to Executive's estate.

          (b)  Group Health Plan.  Executive shall be entitled to
elect  for  himself  "continuation coverage"  as  provided  under
Section  4980B of the Internal Revenue Code of 1986,  as  amended
("COBRA").   In  the  event  Executive  becomes  re-employed  and
eligible for such new employer's group health insurance coverage,
then  this  benefit  shall cease.  To the extent  that  Executive
elects  and  is eligible for continuation coverage  under  COBRA,
Innovo will reimburse him, or alternatively, pay, for the cost of
such  continuation coverage for himself during  the  twelve  (12)
months  following the Termination Date (the "Benefit Continuation
Period").  Such  reimbursements shall be  treated  as  additional
salary  continuation and shall be subject to usual and  customary
deductions required by law and Company policy.  After the Benefit
Continuation Period, Executive shall bear the full cost  of  such
continuation coverage, if available.

          (c)  Life and Disability Insurance.          Subject to
any limitations imposed by applicable laws or by the underwriters
of  any group or individual life or disability insurance policies
maintained  by  Innovo,  Innovo shall continue  its  coverage  of
Executive  under  such group or individual  life  and  disability
insurance  policies through the Benefit Continuation Period.   In
the event Executive becomes re-employed and eligible for such new
employer's  group  or  individual life  or  disability  insurance
coverage, then this benefit shall cease.  If Innovo is unable  to
continue  such  coverage  and if such benefit  is  not  otherwise
terminated  by  re-employment, Innovo shall pay to  Executive  an
amount  sufficient on an after-tax basis to obtain such  coverage
through  the  end  of  the  Benefit  Continuation  Period.   Such
benefits  or  payments  shall  be treated  as  additional  salary
continuation  and  shall  be  subject  to  usual  and   customary
deductions required by law and Innovo policy.

          (d)  Stock Options.      Effective on September 3, 2004
and  June  13,  2005, Innovo granted to Executive  certain  stock
options  as  evidenced by those certain Innovo Group  Inc.  Stock
Option  Agreements executed by Innovo and Executive (the  "Option
Agreements").  As of the Termination Date, Executive had a vested
right  to exercise options to purchase certain shares of Innovo's
common  stock.   Executive and Innovo agree that  each  paragraph
3.1(d) of the Option Agreements is hereby amended to delete  such
section in its entirety.  Accordingly, Executive and Innovo agree
and  acknowledge that Executive shall have the vested right under
the  Options  Agreements, as so amended, to exercise  options  to
purchase  up  to  500,000  shares of  Innovo's  common  stock  in
accordance  with and subject to the terms and provisions  of  the
Option Agreements.

     3. Release of Claims. Each Party hereto,on behalf of himself
or  itself  and  his or its successors, assigns  and  affiliates,
hereby fully and forever releases, remises, waives and discharges
the  other  Party hereto and its successors, assigns, affiliates,
heirs   and   beneficiaries  from  any  and   all,   obligations,
liabilities  and  claims whatsoever (whether  known  or  unknown,
foreseen or unforeseen) relating to or arising in any way out  of
the   Employment   Relationship,  the  termination   thereof   or
otherwise,   including,  without  limitation   any   obligations,
liabilities or claims against Executive arising out of or related
to  any actual or alleged acts or omissions of Executive or based
upon  the  fact that Executive is or was a trustee,  director  or
officer of Innovo or any affiliate of Innovo or is or was serving
at the request of Innovo or any affiliate as a trustee, director,

<PAGE 2>

officer,  member, employee or agent of another corporation  or  a
partnership, joint venture, trust or other enterprise, including,
without  limitation,  service with respect  to  employee  benefit
plans, whether or not the basis of such obligation, liability  or
claim  is  alleged action in an official capacity as  a  trustee,
director, officer, member, employee or agent while serving  as  a
trustee, director, officer, member, employee or agent.  Executive
specifically  acknowledges that he is releasing all  such  claims
including, without limitation, all statutory claims arising under
Title  VII  of  the Civil Rights Act of 1964 ("Title  VII"),  the
Americans with Disabilities Act ("ADA"), the Fair Labor Standards
Act ("FLSA") and any similar federal, state or local statutes  or
regulations.

     4.Indemnification. Innovo agrees that if Executive is made a
party or is threatened to be made a party to any action, suit  or
proceeding,   whether   civil,   criminal,   administrative    or
investigative  (a  "Proceeding"), by  reason  of  the  fact  that
Executive  is or was a trustee, director or officer of Innovo  or
any  affiliate of Innovo or is or was serving at the  request  of
Innovo  or any affiliate as a trustee, director, officer, member,
employee or agent of another corporation or a partnership,  joint
venture,   trust   or   other  enterprise,   including,   without
limitation,  service  with  respect to  employee  benefit  plans,
whether or not the basis of such Proceeding is alleged action  in
an  official  capacity as a trustee, director,  officer,  member,
employee  or agent while serving as a trustee, director, officer,
member, employee or agent, Executive shall be indemnified to  the
fullest extent allowed by applicable law against all liabilities,
losses  and  expenses  incurred  or  suffered  by  Executive   in
connection therewith.  Innovo will cooperate with Executive  with
respect  to  the  defense  of  any Proceeding,  including  making
documents, witnesses and other reasonable information related  to
the  defense  available  to  Executive  and  Executive's  counsel
pursuant   to   joint-defense   agreements   or   confidentiality
agreements, as appropriate.  Innovo agrees to file any  potential
counterclaims or cross claims that Innovo may possess  which  are
related  to such Proceeding, and will take all reasonable  action
to  pursue such counterclaims and cross claims, as Executive  may
reasonably direct.  If Innovo refuses to file or fully pursue any
such  counterclaim or cross claim, in the reasonable  opinion  of
Executive,  Executive  will be deemed  to  be  appointed  as  the
attorney-in-fact  for  Innovo  for  the  purpose  of  filing  and
pursuing such claims on behalf of Innovo.

     5.  Directors' and Officers' Insurance. Innovo will maintain
directors' and officers' insurance with a policy limit of no less
than  $3  million that will cover Executive against  claims  made
against Executive in any Proceeding or threatened Proceeding  for
a  minimum  of  two years after the execution of this  Separation
Agreement.

     6. Non-Disparagement.Each Party acknowledges and agrees that
such  Party  will not defame or publicly criticize the  services,
business,   integrity,  veracity  or  personal  or   professional
reputation  of  the  other  Party in  either  a  professional  or
personal  manner  at  any time following the  execution  of  this
Separation Agreement.

     7.   Cooperation.  Executive hereby agrees to cooperate with
Innovo  regarding  Executive's execution  of  any  necessary  and
appropriate required documentation evidencing said separation  as
set forth pursuant to this Agreement.

<PAGE 3>

     8.   No Amendment.    This   Agreement  may not be rescinded,
amended or modified,except by a written agreement executed by both
Parties.

    9.   Severability.  If any provision of this Agreement is held
by any court of  competent  jurisdiction to be invalid, illegal or
unenforceable,  such  provision  shall  be deemed modified in such
manner as  to render such  provision  valid, legal and enforceable
to the fullest  extent  permitted by law in such jurisdiction. The
remaining  provisions  of  this  Agreement  shall  not be affected
thereby, and shall continue in full force and effect.

   10.   Successors.   This  Agreement  shall  be binding upon the
Parties  and  their  respective  successors and assigns, and shall
inure to the benefit of  their  respective successors and assigns.

   11.   Governing Law.  This  Agreement  shall  be  governed  by,
construed  and  enforced  in accordance with the laws of the State
of  California,  without  reference  to  the  conflict-of-laws  or
choice-of-law  principles  thereof.   The  parties  agree that any
dispute  between  the  parties,  including  but not limited to any
action  or proceeding that may arise under this Agreement shall be
brought  in and maintained in a court of competent jurisdiction in
Los Angeles County, California.

  12.   Confidentiality.   In  consideration  for the promises set
forth   herein,  each  Party  agrees  that  such  Party  will  not
disclose,  disseminate and/or publicize any of the terms  of  this
Agreement,  directly or indirectly, specifically or generally,  to
any   person,  corporation, association  or  governmental  agency,
except   (i)  to  such  Party's  tax return  preparer  and  taxing
agencies,   (ii) as required by law, and (iii) in response  to  an
order  of a court or governmental agency of competent jurisdiction
or subpoena issued under proper authority.

  13.   No Other Benefits.  Executive acknowledges that, except as
set  forth herein,  he is not entitled to any compensation, monies
or benefits from Innovo, including but not limited to compensation
for accrued vacation, bonuses,commissions, expenses or other forms
of compensation or benefits. Executive hereby waives all rights to
any payments other than for outstanding bonafide business expenses
incurred  by  Executive  on  behalf of Innovo prior to January 20,
2006.

  14.   Entire Agreement.   This Agreement represents and contains
the entire agreement and understanding between Executiveand Innovo
with respect to its subject matter,  and it supersedes any and all
prior  oral  and  written  agreements  and  understandings, and no
representation, warranty, condition,understanding, or agreement of
any kind with respect to the subject matter of this Agreement will
be relied upon by  Executive  unless  specifically incorporated in
this Agreement; provided, however,that the Option Agreements, will
each remain in fullforce and effect,except to the extent expressly
modified or amended hereunder. Further, this Agreement is intended
to  be  a  binding  contract  between the parties and shall not be
modified, except by writing signed by both parties.

  15.  Tax Withholdings.Certain payments made under this Agreement
may  be  subject  to  required  income and other tax withholdings.
Executive will be responsible for any taxes which  may be due as a

<PAGE 4>

result  of  any  payments  made  by  Innovo  or benefits otherwise
provided as described above, and Executive agrees to indemnify and
hold  Innovo  harmless  from any claim and expense that Innovo may
incur as a resultof any failure by Executive to pay any such taxes.

                        *    *    *    *

     IN  WITNESS  WHEREOF, the Parties hereto have each  reviewed,
understood, approved and executed this Agreement as of  the  date
opposite their respective signatures.

EXECUTIVE:

Signed:    /s/ Samuel J. Furrow, Jr.     Dated: January 27, 2006
           Samuel J. Furrow, Jr.

INNOVO GROUP INC.:

Signed:    /s/ Marc Crossman             Dated: January 27, 2006
           Marc Crossman
           Authorized Representative of
           Innovo Group, Inc.

<PAGE 5>
<END>Exhibit 4.1
                     CONSENT AND WAIVER TO CREDIT AGREEMENT
                     --------------------------------------

     This CONSENT AND WAIVER TO CREDIT  AGREEMENT (this  "Agreement") is entered
into and effective as of January 20, 2006, by and among ESCO TECHNOLOGIES  INC.,
a Missouri  corporation  ("Borrower"),  WELLS FARGO BANK,  NATIONAL  ASSOCIATION
("Wells Fargo"), as Administrative  Agent  ("Administrative  Agent"),  and Wells
Fargo  and  the  other  lenders  listed  on  the  signature  pages  hereto  (the
"Lenders").

                                    Recitals:
                                    ---------

A.   Borrower,  Administrative  Agent and Lenders have  heretofore  entered into
     that certain Credit  Agreement dated as of October 6, 2004, as amended from
     time to time (as amended,  the "Credit  Agreement;" all  capitalized  terms
     used and not otherwise  defined in this Agreement shall have the respective
     meanings  ascribed  to them in the  Credit  Agreement  as  amended  by this
     Agreement).

B.   Administrative  Agent,  Lenders and Borrower have agreed to the  provisions
     set forth herein on the terms and conditions contained herein.

                                    Agreement
                                    ---------

     Therefore,  in  consideration  of the  mutual  agreements  herein and other
sufficient consideration, the receipt of which is hereby acknowledged, Borrower,
Administrative Agent and Lenders hereby agree as follows:

1. Consent. Borrower has notified Administrative Agent and Lenders regarding the
   -------
possible   acquisition  of  Hexagram,   Inc.,  an  Ohio  corporation,   by  ESCO
Technologies  Holding Inc. (the "Hexagram  Acquisition") for an initial purchase
price  not to  exceed  $70,000,000.00  plus  contingent  payments  not to exceed
$7,500,000.00 payable over five (5) years (collectively,  the "Purchase Price").
Section 5.14 of the Credit  Agreement  provides  that  Borrower will not, and it
will not cause or permit any Subsidiary to,  consummate any  Acquisitions  other
than  Permitted  Acquisitions.  The Purchase Price may exceed the limitation set
forth in subsection (e) of the definition of Permitted Acquisition. Furthermore,
the Purchase  Price,  when aggregated with the purchase price paid in connection
with the acquisition by ESCO Technologies Holding Inc. of Nexus Energy Software,
Inc.,   a   Massachusetts   corporation,   on  November  29,  2005  (the  "Nexus
Acquisition"),  exceeds  the  limitation  set  forth  in  subsection  (f) of the
definition of Permitted Acquisition. At the request of Borrower,  Administrative
Agent and Lenders hereby (a) waive the application of subsections (e) and (f) of
the definition of Permitted Acquisition to the Hexagram Acquisition, (b) consent
to the consummation of the Hexagram  Acquisition for consideration not exceeding
the Purchase Price,  subject to the  fulfillment of the remaining  conditions of
the definition of Permitted  Acquisition,  and (c) agree to exclude the Hexagram
Acquisition and Nexus  Acquisition  from the annual  Acquisition  limitation set
forth in subsection  (f) of the definition of Permitted  Acquisition;  provided,
however,  that (1)  contemporaneously  with  the  execution  of this  Agreement,
Borrower delivers, or causes to be delivered, to Administrative Agent, a Joinder
Agreement executed by Nexus Energy Software, Inc. in the form attached hereto as
Exhibit A (the "Nexus  Joinder") and (2) within ten (10) Business Days following
the closing date of the Hexagram  Acquisition,  Borrower  agrees to deliver,  or
cause to be delivered,  to Administrative Agent, a Joinder Agreement executed by
Hexagram,  Inc.  in the  form  attached  hereto  as  Exhibit  B  (the  "Hexagram
Joinder"). Borrower further agrees to deliver, or cause to be delivered, any and
all other  documentation,  including,  without  limitation,  certified corporate
documents,   resolutions  and  legal  opinions,   as  Administrative  Agent  may
reasonably  require  in  connection  with the  Nexus  Joinder  and the  Hexagram
Joinder, all of which must be in form and substance  reasonably  satisfactory to
Administrative  Agent.  Borrower further  acknowledges and agrees that Hexagram,
Inc. and Nexus Energy  Software,  Inc. will each become a "Domestic  Subsidiary"
and "Material Subsidiary" as such terms are defined in the Credit Agreement, and
it  will  cause  such  Subsidiaries  to  execute  any  and  all  such  documents
(including,  without limitation, the Joinder Agreements described above), as are
required  pursuant  to Section  5.17 of the Credit  Agreement.  The  consent and
waiver granted herein constitute the consent and waiver of Administrative  Agent
and Lenders only for the specific  purposes herein  described and upon the terms
and  conditions  set forth herein and shall not be deemed a consent to or waiver
of Section 5.14 or any other  provisions  of the Credit  Agreement for any other
Acquisition,  transaction  or  purpose  prohibited  by the  terms of the  Credit
Agreement or any other Loan Document.

2. Representations and Warranties of  Borrower.  Borrower  hereby represents and
   -------------------------------------------
warrants to  Administrative  Agent and Lenders  that (i)  Borrower's  execution,
delivery and  performance  of this  Agreement  has been duly  authorized  by all
requisite  action of  Borrower,  (ii) no consents are  necessary  from any third
parties for Borrower's  execution,  delivery or  performance of this  Agreement,
(iii)  this  Agreement,  the  Credit  Agreement,  and  each  of the  other  Loan
Documents,  constitute  the legal,  valid and  binding  obligations  of Borrower
enforceable  against  Borrower in  accordance  with their  terms,  except to the
extent  that the  enforceability  thereof  against  Borrower  may be  limited by
bankruptcy,  insolvency or other laws affecting the  enforceability of creditors
rights generally or by equity principles of general application, (iv) all of the
representations  and warranties  contained in Article IV of the Credit Agreement
are true and correct  with the same force and effect as if made on and as of the
date of this Agreement,  (v) after giving effect to this Agreement,  there is no
Event of Default,  (vi) since the  Effective  Date,  there has been no change or
modification  to  the  organizational   documents  of  Borrower,  any  Borrowing
Subsidiary or any Guarantor  Subsidiary,  (vii) since the Effective Date,  there
has  been no  change  in the  financial  condition  or  business  operations  of
Borrower,  any  Borrowing  Subsidiary or any  Guarantor  Subsidiary  which could
reasonably be expected to result in a Material Adverse Effect,  (viii) there are
no  proceedings  of any  kind,  pending  or  threatened  against  Borrower,  any
Borrowing  Subsidiary or any  Guarantor  Subsidiary,  which could  reasonably be
expected  to result in a Material  Adverse  Effect,  and( ix) there are no Liens
with respect to Borrower or its Subsidiaries or any of their respective  assets,
except for those Liens permitted by Section 5.11 of the Credit Agreement.

3.  Reaffirmation.   Borrower  hereby  represents,  warrants,  acknowledges  and
    -------------
confirms that (i) the Credit  Agreement and the other Loan  Documents  remain in
full force and effect,  (ii) Borrower has no defenses to its  obligations  under
the Credit  Agreement and the other Loan  Documents,  and (iii)  Borrower has no
claim against  Administrative  Agent or any Lender arising from or in connection
with the  Credit  Agreement  or the other Loan  Documents  and any such claim is
hereby irrevocably waived and released and discharged forever.

4.  Definitions.  All references in the Credit Agreement to "this Agreement" and
    -----------
any  other  references  of  similar  import  shall  henceforth  mean the  Credit
Agreement as amended by this Agreement.

5.  Effectiveness of Agreement.  This Agreement shall become  effective,  unless
    --------------------------
otherwise  stated herein,  as of the date first written above,  but only if this
Agreement  has been executed by Borrower,  Administrative  Agent and Lenders and
acknowledged by each Guarantor.

6. Governing Law. This  Agreement  shall be governed by and construed  under the
   -------------
laws of the State of Missouri  without  giving  effect to choice or conflicts of
law principles thereunder.

7. Section Titles.  The section titles in this  Agreement are for convenience of
   --------------
reference only and shall not be construed so as to modify any provisions of this
Agreement.

8. Counterparts;  Facsimile Transmissions. This Agreement may be executed in one
   --------------------------------------
or more counterparts and on separate counterparts, each of which shall be deemed
an  original,  but all of  which  together  shall  constitute  one and the  same
instrument.  Signatures  to this  Agreement  may be given by  facsimile or other
electronic transmission, and such signatures shall be fully binding on the party
sending the same.

9. Incorporation By Reference. Administrative Agent, Lenders and Borrower hereby
   --------------------------
agree that all of the terms of the Loan Documents are incorporated in and made a
part of this Agreement by this reference.

10. Fees and Expenses.  Borrower shall promptly pay to Administrative  Agent all
    -----------------
fees, expenses and other amounts owing to Administrative  Agent under the Credit
Agreement and the other Loan Documents, including, without limitation, all fees,
costs and  expenses  incurred by  Administrative  Agent in  connection  with the
preparation, negotiation, execution, and delivery of this Agreement.

11. No Oral Agreements;  Entire Agreement.   This notice is provided pursuant to
    -------------------------------------
Section 432.047 R.S.Mo. As used herein,  "creditor" means  Administrative  Agent
and Lenders and "this writing" means this Agreement,  the Credit Agreement,  and
the other Loan Documents.  ORAL AGREEMENTS OR COMMITMENTS TO LOAN MONEY,  EXTEND
CREDIT OR TO FORBEAR FROM ENFORCING  REPAYMENT OF A DEBT  INCLUDING  PROMISES TO
EXTEND OR RENEW SUCH DEBT ARE NOT  ENFORCEABLE,  REGARDLESS  OF THE LEGAL THEORY
UPON WHICH IT IS BASED THAT IS IN ANY WAY RELATED TO THIS AGREEMENT.  TO PROTECT
YOU (BORROWER(S)) AND US (CREDITOR) FROM MISUNDERSTANDING OR DISAPPOINTMENT, ANY
AGREEMENTS WE REACH  COVERING SUCH MATTERS ARE CONTAINED IN THIS WRITING,  WHICH
IS THE COMPLETE AND EXCLUSIVE  STATEMENT OF THE AGREEMENT  BETWEEN US, EXCEPT AS
WE MAY LATER AGREE IN WRITING TO MODIFY IT.

12. Patriot Act Notice. Administrative Agent and each Lender hereby notifies the
    ------------------
Borrower  and each  Guarantor  that,  pursuant  to the  requirements  of the USA
Patriot Act, Title III of Pub. L. 107-56,  signed into law October 26, 2001 (the
"Act"), it is required to obtain,  verify and record information that identifies
the Borrower and each Guarantor, which information includes the name and address
of the  Borrower  and each  Guarantor  and other  information  that  will  allow
Administrative Agent or such Lender, as applicable, to identify the Borrower and
each Guarantor in accordance with the Act.

                  [remainder of page intentionally left blank]

<PAGE>

IN WITNESS  WHEREOF,  this Agreement has been duly executed as of the date first
above written.

ESCO TECHNOLOGIES, INC., a Missouri corporation, as Borrower

By:      /s/ V.L. Richey, Jr.
Name:
Title:

WELLS FARGO BANK, NATIONAL ASSOCIATION,
as Administrative Agent and a Lender

By:      /s/ Kevin L. Handley
Name:             Kevin L. Handley
Title:            Vice President

BANK OF AMERICA, N.A., Lender

By:      /s/ Jason R. Hickey
Name:             Jason R. Hickey
Title:            Senior Vice President

LASALLE BANK NATIONAL ASSOCIATION, Lender

By:      /s/ Michelle Dacey
Name:             Michelle Dacey
Title:            Commercial Banking Officer

JPMORGAN CHASE BANK, NATIONAL ASSOCIATION, Lender

By:      /s/ Christopher C. Cavaiani
Name:             Christopher Cavaiani
Title:            Vice President

COMMERCE BANK, N.A., Lender

By:      /s/ Mark Winker
Name:             Mark Winker
Title:            Vice President

<PAGE>

THE NORTHERN TRUST COMPANY, Lender

By:      /s/ David Sullivan
Name:             David Sullivan
Title:            Vice President

Acknowledged and Agreed to as of __________________, 2006.

COMTRAK TECHNOLOGIES, L.L.C., a Missouri limited liability company

By:      /s/ V.L. Richey, Jr.
Name:
Title:

DISTRIBUTION CONTROL SYSTEMS, INC., a Missouri corporation

By:      /s/ V.L. Richey, Jr.
Name:
Title:

ETS-LINDGREN L.P., a Texas limited partnership

By:  RANTEC COMMERCIAL, INC.

By:      /s/ V.L. Richey, Jr.
Name:
Title:

ESCO TECHNOLOGIES HOLDING INC., a Delaware corporation

By:      /s/ V.L. Richey, Jr.
Name:
Title:

<PAGE>

FILTERTEK INC., a Delaware corporation

By:      /s/ V.L. Richey, Jr.
Name:
Title:

LINDGREN, INC., a Delaware corporation

By:      /s/ V.L. Richey, Jr.
Name:
Title:

LINDGREN R.F. ENCLOSURES, INC., an Illinois corporation

By:      /s/ V.L. Richey, Jr.
Name:
Title:

PTI TECHNOLOGIES INC., a Delaware corporation

By:      /s/ V.L. Richey, Jr.
Name:
Title:

RANTEC HOLDINGS, INC., a Missouri corporation

By:      /s/ V.L. Richey, Jr.
Name:
Title:

RANTEC COMMERCIAL, INC., a California corporation

By:      /s/ V.L. Richey, Jr.
Name:
Title:

VACCO INDUSTRIES, a California corporation

By:      /s/ V.L. Richey, Jr.
Name:
Title:
<PAGE>

Exhibit A

                                JOINDER AGREEMENT
                                -----------------

     THIS JOINDER AGREEMENT (the "Agreement"),  dated as of January 20, 2006, is
by and between NEXUS ENERGY  SOFTWARE,  INC., a Massachusetts  corporation  (the
"Subsidiary"),  and WELLS FARGO BANK, NATIONAL  ASSOCIATION,  in its capacity as
Administrative  Agent under that certain Credit Agreement dated as of October 6,
2004, among ESCO  Technologies,  Inc., a Missouri  corporation (the "Borrower"),
the Lenders identified therein and Wells Fargo Bank,  National  Association,  as
Administrative  Agent (as the same may from time to time be  amended,  modified,
extended, renewed or restated, the "Credit Agreement"). All of the defined terms
in the Credit Agreement are incorporated herein by reference.

     Reference is further made to that certain  Continuing  Guaranty dated as of
October 6, 2004 by and among Comtrak Technologies,  L.L.C., Distribution Control
Systems,  Inc.,  ETS-Lindgren  L.P., ESCO Technologies  Holding Inc.,  Filtertek
Inc.,  Lindgren,  Inc., Lindgren R.F.  Enclosures,  Inc., PTI Technologies Inc.,
Rantec  Holdings,  Inc.,  Rantec  Commercial,  Inc.,  and Vacco  Industries,  as
Guarantors,  in favor of Administrative  Agent and Lenders (as the same may from
time  to  time  be  amended,  modified,   extended,  renewed  or  restated,  the
"Guaranty").

     The Borrower is required by Section  5.17 of the Credit  Agreement to cause
the  Subsidiary  to  guaranty  the  payment  and   performance  of  all  of  the
Obligations.

     Accordingly,  the Subsidiary hereby agrees with the  Administrative  Agent,
for the benefit of the Lenders as follows:

     1. The  Subsidiary  hereby  acknowledges,  agrees and confirms that, by its
execution of this Agreement,  the Subsidiary will be deemed to be a party to the
Guaranty and a "Guarantor" for all purposes of the Guaranty,  and shall have all
of the obligations of a Guarantor thereunder as if it had executed the Guaranty.
The Subsidiary  hereby ratifies,  as of the date hereof,  and agrees to be bound
by, all of the terms,  provisions  and  conditions  applicable to the Guarantors
contained in the  Guaranty.  Without  limiting the  generality  of the foregoing
terms,  the  Subsidiary  hereby  absolutely  and  unconditionally   jointly  and
severally  guarantees  to each  Lender,  the Swing  Line  Lender,  the  Offshore
Currency  Fronting  Lender,  the Letter of Credit Issuer and the  Administrative
Agent  the  prompt  and  complete  payment  when due in  accordance  with  their
respective  terms  (whether  by  reason of  demand,  maturity,  acceleration  or
otherwise)  of any  and  all  of the  Obligations  (whether  heretofore,  now or
hereafter  made,  incurred or created,  whether  voluntary  or  involuntary  and
however arising, absolute or contingent, liquidated or unliquidated,  determined
or undetermined,  whether the Borrower or any Borrowing Subsidiary may be liable
individually or jointly with others and whether  recovery upon such  Obligations
may be or hereafter  becomes  unenforceable)  in  accordance  with the terms and
conditions  hereof.  In addition,  the Subsidiary shall and agrees to be jointly
and  severally  liable to each  Lender,  the Swing  Line  Lender,  the  Offshore
Currency  Fronting  Lender,  the Letter of Credit Issuer and the  Administrative
Agent  for all costs and  expenses  incurred  by such  Person in  attempting  or
effecting  collection  under the Guaranty  (whether or not  litigation  shall be
commenced in aid thereof) and in connection with  representation  of such Person
in connection with bankruptcy or insolvency proceedings relating to or affecting
the Guaranty,  including,  without  limitation,  reasonable  attorneys' fees and
expenses.

     2. This  Agreement  may be  executed in two or more  counterparts,  each of
which shall  constitute an original but all of which when taken  together  shall
constitute one contract.

     3. This  Agreement  shall be governed by and construed and  interpreted  in
accordance  with the laws of the State of  Missouri.

     IN WITNESS WHEREOF,  the Subsidiary has caused this Joinder Agreement to be
duly executed by its authorized officers,  and the Administrative Agent, for the
benefit of the  Lenders,  has caused the same to be accepted  by its  authorized
officer, as of the day and year first above written.

                                            NEXUS ENERGY SOFTWARE, INC.

                                            By:      s/ V. L. Richey
                                            Name:    V. L. Richey
                                            Title:   Chairman and CEO

                                            Acknowledged and accepted:

                                            WELLS FARGO BANK,
                                            NATIONAL ASSOCIATION
                                            as Administrative Agent

                                            By:      s/Kevin L. Handley
                                            Name:    Kevin L. Handley
                                            Title:   Vice President

<PAGE>

Exhibit B

                             SECRETARY'S CERTIFICATE
                                       OF
                           NEXUS ENERGY SOFTWARE, INC.

     I am Secretary of Nexus Energy Software, Inc., a Massachusetts  corporation
(the "Company"), and do hereby certify further that:

     1. Attached hereto as Exhibit A is a true and complete copy of the Articles
of Organization of the Company certified by the Secretary of the Commonwealth of
Massachusetts and in effect on this date.

     2. Attached  hereto as Exhibit B is a true and complete copy of the By-Laws
of the Company as in effect on this date.

     3. Each persons named in Exhibit C hereto is a duly elected,  qualified and
acting officer or authorized signatory of the Company, holding the office in the
Company  set  forth  opposite  his or her name on such  Exhibit,  and set  forth
opposite his or her name on such Exhibit is the genuine signature of such person
or a true facsimile of such genuine signature.

     4. No further amendment to the Articles of Incorporation of the Company has
been approved by its Board of Directors or  stockholders  or has been filed with
the Secretary of the Commonwealth of Massachusetts.

     5. The Company is in good standing as a  corporation  under the laws of the
Commonwealth of  Massachusetts,  no proceeding has been commenced or to the best
of my  knowledge is  contemplated  for the  dissolution  or  liquidation  of the
Company.

     6. Attached  hereto as Exhibit D is a true and complete copy of resolutions
duly  adopted by  unanimous  written  consent of the Board of  Directors  of the
Company  authorizing the transactions  contemplated  therein,  which resolutions
have not been amended and are in full force and effect on this date.

     IN  WITNESS  WHEREOF,  the  undersigned  has  caused  this  Certificate  of
Secretary to be executed on January 20, 2006.

(Seal)                                   s/Alyson S. Barclay
                                         Alyson S. Barclay, Secretary

     I am Vice  President of the Company.  I hereby  certify that on the date of
the Certificate set forth above Alyson S. Barclay is the duly elected, qualified
and acting  Secretary of the Company and that the  signature  set forth above is
his genuine signature.

                                         s/V. L. Richey
                                         V. L. Richey, ____________

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