THIRD AMENDMENT TO EMPLOYMENT AGREEMENT       Exhibit 10.20



         THIS THIRD  AMENDMENT TO  EMPLOYMENT  AGREEMENT,  which shall be deemed
effective  as of the 20th day of March,  1998,  is entered  into by ITRON,  INC.
(hereinafter  referred to as the  "Company")  and CARL ROBERT ARON  (hereinafter
referred to as "Executive").

                                     RECITAL

         The Company and Executive are parties to an employment agreement, dated
as of November 22, 1995 (the "Original Agreement"),  and two amendments thereto,
the first of which (the "First  Amendment")  is dated as of April 29, 1996,  and
the second of which (the "Second  Amendment")  is dated as of December 17, 1997.
The  Company  and  Executive  agree that Good  Reason,  as defined in the Second
Amendment,  exists for  termination  of the  Employment  Agreement by Executive.
Notwithstanding  the  existence of Good Reason for  Executive  to terminate  the
Employment  Agreement,  the  Company  and  Executive  desire to  continue  their
employment  relationship  and modify the terms of the employment of Executive by
the Company,  changing  Executive's title and  responsibilities,  establishing a
minimum fixed term for Executive's  employment,  and setting forth certain terms
and conditions of his compensation and stock vesting  benefits.  The Company and
Executive  therefore mutually agree to amend with this document Sections 1, 2.1,
4.3,  5.1, 5.3, 8, and 10.1 of the Original  Agreement,  as amended in the First
Amendment and the Second  Amendment  (together the "Employment  Agreement"),  in
accordance with the provisions of Section 10.3 of the Employment Agreement.

                                    AGREEMENT

         For good and valuable  consideration,  the receipt and  sufficiency  of
which is hereby acknowledged, the parties hereto agree as follows:

1.       EMPLOYMENT

         Section  1 of  the  Employment  Agreement  is  amended  to  change  the
description of Executive's title and responsibilities.  The amended Section 1 of
the Employment Agreement reads as follows:







                  "The Company will employ Executive,  and Executive will accept
                  employment by the Company, as the Executive Vice President and
                  Chief Strategist.  Executive will have such authority, subject
                  to the Company's  Articles of Incorporation and Bylaws, as may
                  be granted from time to time by the Chief Executive Officer or
                  the Board of Directors of the Company.  Executive will perform
                  the duties customarily  performed by the Chief Strategist of a
                  corporation  and  such  other  duties,   consistent  with  and
                  appropriate to the  Executive's  position as an Executive Vice
                  President  and  Chief  Strategist  of  the  Company,   as  may
                  reasonably  be  assigned  from  time  to  time  by  the  Chief
                  Executive Officer or the Board of Directors of the Company."

2.       COMPENSATION

         Section  2.1  of the  Employment  Agreement  is  amended  to  establish
Executive's  base salary during the remaining term of the Employment  Agreement.
The amended Section 2.1 of the Employment Agreement reads as follows:

                  "The Company  shall pay  Executive a base salary rate of Three
                  Hundred Fifteen  Thousand  Dollars  ($315,000) per year, which
                  shall be subject to all customary payroll deductions and shall
                  be  payable at the same  intervals  as are  applicable  to the
                  payment  of  the  base  salaries  of  other  officers  of  the
                  Company."

3.       STOCK OPTIONS

         Section 4.3 of the  Employment  Agreement  is amended to  describe  the
period  during  which  Executive  may  exercise  stock  options   following  the
termination  of his  employment  and to provide for the expection of granting of
additional  stock options in 1998. The third  paragraph of Section 4.3 is hereby
deleted, and a new third paragraph is added that reads as follows:

                  "It  is  anticipated   that,   assuming  due   performance  of
                  Executive's  duties  hereunder as Executive Vice President and
                  Chief  Strategist,  the Chief Executive Officer of the Company
                  will recommend to the Compensation  Committee of the Company's
                  Board of  Directors  the granting to Executive at the May 1998
                  meeting of the  Compensation  Committee of options to purchase
                  Thirty Thousand  (30,000) shares of the Company's common stock
                  (in addition to those options already  granted).  Any granting
                  to Executive of  additional  stock options will be at the sole
                  discretion  of  the  Compensation  Committee.   Following  the
                  termination  of  Executive's  employment  under the Employment
                  Agreement for any reason,  Executive  will have a period of up
                  to ninety (90) days to exercise  any and all options that have
                  vested as of the date of such  termination  or pursuant to the
                  acceleration described in Section 5.1."

4.       TERMINATION OTHER THAN FOR CAUSE

         Subsection 5.1 of the Employment  Agreement is hereby amended to extend
the  acceleration  period for  Executive's  stock  options upon  termination  of
employment  and to add a description of the benefits to be received by Executive
in case of  termination  other than for Cause  before  February  28,  1999.  The
amended Section 5.1 of the Employment Agreement reads as follows:

                  "5.1 TERMINATION OTHER THAN FOR CAUSE

                  5.1.1  In the  event  that  (a) the  Company  terminates  this
                  Agreement  for any reason  other  than  Cause (as  hereinafter
                  defined),or  (b) Executive  terminates this Agreement for Good
                  Reason (as hereinafter  defined),  then, and in either of such
                  events,  (x)  the  dates  as of  which  any  and  all  options
                  theretofore  granted to Executive  to purchase  the  Company's
                  common stock would have become  vested in and  exercisable  by
                  Executive but for the effect of this Section 5 shall forthwith
                  upon such  termination be accelerated by fifteen  months,  (y)
                  within ten (10) business days of such termination, the Company
                  shall pay Executive a Termination Amount of $750,000,  and (z)
                  all salary,  bonuses and payments under employee benefit plans
                  to  which  Executive  may  be  entitled  (including,   without
                  limitation,  the bonus  described in Section 2.2 hereof) shall
                  become due and payable.

                  "5.1.2 In the event that the  Company  terminates  Executive's
                  employment without Cause at any time before February 28, 1999,
                  the Company  shall,  in addition to the  payments and benefits
                  set forth in the foregoing  Section 5.1.1, (i) continue to pay
                  Executive  an amount  equal to his base  salary at the time of
                  termination for the period through February 28, 1999, paid out
                  in installments at the same intervals as the Company's  normal
                  executive payroll,  (ii) within ten (10) business days of such
                  termination  pay to Executive  all bonuses and payments  under
                  employee  benefit  plans to which  Executive  would  have been
                  entitled (including,  without limitation,  the bonus described
                  in Section 2.2 hereof),  had his employment  continued through
                  February  28,  1999,  and  (iii)  add to the  acceleration  of
                  options'  vesting and  exercisability  pursuant to 5.1.1 (x) a
                  period   equal  to  the  number  of  days  from  the  date  of
                  termination to February 28, 1999."

5.       TERMINATION FOR GOOD REASON

         Subsection  (a) of Section 5.3 of the Employment  Agreement,  is hereby
amended to change the  definition of "Good  Reason." The amended  Section 5.3 of
the Employment Agreement reads as follows:

                  "'Good  Reason'  shall mean (a) a decision by Executive in his
                  sole  discretion at any time that he does not wish to continue
                  his   employment   with  the  Company,   (b)  a  reduction  in
                  Executive's  base salary,  (c) any  purported  termination  of
                  Executive's  employment  by the Company  which is not effected
                  pursuant to the material requirements of this Agreement, (d) a
                  Change in  Control  (as  identified  in the  Change in Control
                  Agreement  annexed  hereto as Exhibit II), or (e) the death or
                  disability  (as  defined  and  limited by  Section  5.4 of the
                  Agreement) of the Executive during the term of this Agreement.
                  (In  case of  Executive's  death  while in the  employ  of the
                  Company  under this  Agreement or any extension  thereof,  the
                  termination   payment  described  in  Section  5.1.1  of  this
                  Agreement will be paid to Executive's estate.)"

6.       DURATION

         Section  8 of the  Employment  Agreement  is  amended  to  establish  a
termination date for Executive's employment with the Company, subject to earlier
termination  as provided in other  provisions  of the  Employment  Agreement  or
extension  pursuant to this  amendment.  The amended Section 8 of the Employment
Agreement reads as follows:

                  "This Agreement  shall terminate on February 28, 1999,  unless
                  terminated  earlier by either party hereto pursuant to Section
                  5 of the  Agreement  or  extended  on a  month-to-month  basis
                  thereafter  through  agreement of the parties.  Termination of
                  this  Agreement  on  February  28,  1999,  or  termination  of
                  Executive's  emloyment  by the  Company  following  any agreed
                  extension of this Agreement, shall, unless termination is 'For
                  Cause,' as defined in Section 5.3 of the Agreement,  be deemed
                  a 'Termination Other Than for Cause,' triggering the Company's
                  obligations  described  in  Section  5.1.1 of this  Agreement.
                  Termination  by Executive of this  Agreement for 'Good Reason'
                  as defined in  subsections  (b),  (c),  (d), or (e) of Section
                  5.3, whether before, on or after February 28, 1999, shall also
                  trigger the Company's  obligations  described in Section 5.1.1
                  of this Agreement."

7.       NOTICES

         Section 10.1 of the Amended  Employment  Agreement is hereby amended to
read as follows:

                  "Every notice required by the terms of this Agreement shall be
                  given in writing by serving the same upon the party to whom it
                  was addressed  personally or by registered or certified  mail,
                  return receipt requested, at the address set forth below or at
                  such other  address as may  hereafter be  designated by notice
                  given in compliance with the terms hereof:

                  If to Executive:          Carl Robert Aron
                                            2024 East Southeast Blvd.
                                            Spokane, Washington  99203

                  With a copy to:           Stuart E. Seigel, Esq.
                                            Arnold & Porter
                                            399 Park Avenue
                                            New York, New York 10022

                  If to Company:            ITRON, Inc.
                                            2818 North Sullivan Road
                                            Spokane, Washington  99215
                                            Attention:  President

     or such other  address as shall be  provided in  accordance  with the terms
hereof. If notice is mailed, such notice shall be effective upon mailing."

8.       COUNTERPARTS

         This  Third  Amendment  to  Employment  Agreement  may be  executed  in
counterparts,  each of which counterpart shall be deemed an original, but all of
which together shall constitute one and the same instrument.

         IN WITNESS  WHEREOF,  the parties  have  executed and entered into this
Third Amendment to Employment Agreement as of the date set forth above.

                                   ITRON, INC.
                                   By:  /s/ JOHNY M. HUMPHREYS
                                   ----------------------------------------
                                   Its President and Chief Executive Officer



                                       /s/ CARL R. ARON 
                                    ---------------------------------------
                                    Carl Robert Aron