SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549


SCHEDULE 13D

Under the Securities Exchange Act of 1934 (Amendment No. 35)


Idex Corporation
(Name of Issuer)

Common Stock, Par Value $0.01 Per Share
(Title of Class of Securities)


45167R104
(CUSIP Number)

James E. McKee
Gabelli Asset Management Inc.
One Corporate Center
Rye, New York 10580-1435
(914) 921-5294
(Name, Address and Telephone Number of Person Authorized to Receive Notices and
Communications)


July 15, 2003
(Date of Event which Requires Filing of this Statement)


If the filing person has previously filed a statement on Schedule 13G to report
the acquisition that is the subject of this Schedule 13D, and is filing this
schedule because of Section 240.13d-1(e), 240.13d-1(f)
or 240.13d-1(g), check the following box.



CUSIP No. 45167R104
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Gabelli Funds, LLC	                                           		I.D. NO.
13-4044523
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
SOURCE OF FUNDS (SEE INSTRUCTIONS)
    00-Funds of investment advisory clients

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7

SOLE VOTING POWER

698,000 (Item 5)

8

SHARED VOTING POWER

NONE

9

SOLE DISPOSITIVE POWER

698,000 (Item 5)

10

SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

698,000 (Item 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

2.15%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    IA

CUSIP No. 45167R104
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

GAMCO Investors, Inc.
	I.D. NO.  13-4044521
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
SOURCE OF FUNDS (SEE INSTRUCTIONS)
 00-Funds of investment advisory clients

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7

SOLE VOTING POWER

1,506,228 (Item 5)

8

SHARED VOTING POWER

NONE

9

SOLE DISPOSITIVE POWER

1,534,978 (ITEM 5)

10

SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,534,978 (ITEM 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

4.72%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    IA, CO


CUSIP No. 45167R104
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Gabelli Group Capital Partners, Inc.
	I.D. NO.  13-3056041
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
Source of funds (SEE INSTRUCTIONS)
   None

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7

SOLE VOTING POWER

None

8

SHARED VOTING POWER

NONE

9

SOLE DISPOSITIVE POWER

NONE

10

SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

NONE
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)	X
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

NONE
14

TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    HC, CO

CUSIP No. 45167R104
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Gabelli Asset Management Inc.
I.D. NO.  13-4007862
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
Source of funds (SEE INSTRUCTIONS)
None

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7

SOLE VOTING POWER

None

8

SHARED VOTING POWER

NONE

9

SOLE DISPOSITIVE POWER

NONE

10

SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

NONE
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)	X
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.00%

14


TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    HC, CO

CUSIP No. 45167R104
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Mario J. Gabelli
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
Source of funds (SEE INSTRUCTIONS)
 None

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   USA

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7

SOLE VOTING POWER

None

8

SHARED VOTING POWER

NONE

9

SOLE DISPOSITIVE POWER

NONE

10

SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

NONE
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.00%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    IN

Item 1.		Security and Issuer
		This Amendment No. 35 to Schedule 13D on the Common Stock of Idex
Corporation (the "Issuer") is being filed on behalf of the undersigned to amend
the Schedule 13D, as amended (the "Schedule 13D") which was originally filed on
June 16, 1989.  Unless otherwise indicated, all capitalized terms used herein
but not defined herein shall have the same meanings as set forth in the
Schedule 13D.

Item 2.		Identity and Background
		This statement is being filed by Mario J. Gabelli ("Mario Gabelli")
and various entities which he directly or indirectly controls or for which he
acts as chief investment officer.  These entities, except for Lynch Corporation
("Lynch") and Lynch Interactive Corporation ("Interactive"), engage in various
aspects of the securities business, primarily as investment adviser to various
institutional and individual clients, including registered investment companies
and pension plans, and as general partner of various private investment
partnerships.  Certain of these entities may also make investments for their
own accounts.
	The foregoing persons in the aggregate often own beneficially more than
5% of a class of a particular issuer.  Although several of the foregoing
persons are treated as institutional investors for purposes of reporting their
beneficial ownership on the short-form Schedule 13G, the holdings of those who
do not qualify as institutional investors may exceed the 1% threshold presented
for filing on Schedule 13G or implementation of their investment philosophy may
from time to time require action which could be viewed as not completely
passive.  In order to avoid any question as to whether their beneficial
ownership is being reported on the proper form and in order to provide greater
investment flexibility and administrative uniformity, these persons have
decided to file their beneficial ownership reports on the more detailed
Schedule 13D form rather than on the short-form Schedule 13G and thereby to
provide more expansive disclosure than may be necessary.
	(a), (b) and (c) - This statement is being filed by one or more of the
following persons: Gabelli Group Capital Partners, Inc. ("Gabelli Partners"),
Gabelli Asset Management Inc. ("GBL"), Gabelli Funds, LLC ("Gabelli Funds"),
GAMCO Investors, Inc. ("GAMCO"), Gabelli Advisers, Inc. ("Gabelli Advisers"),
Gabelli Securities, Inc. ("GSI"), Gabelli & Company, Inc. ("Gabelli &
Company"), Gabelli & Company, Inc. Profit Sharing Plan (the "Plan"), MJG
Associates, Inc. ("MJG Associates"), Gabelli Foundation, Inc. ("Foundation"),
Mario Gabelli, Lynch, and Interactive.  Those of the foregoing persons signing
this Schedule 13D are hereafter referred to as the "Reporting Persons".
	Gabelli Partners makes investments for its own account and is the parent
company of GBL.  GBL, a public company listed on the New York Stock Exchange,
is the parent company for a variety of companies engaged in the securities
business, including those named below.
	GAMCO, a wholly-owned subsidiary of GBL, is an investment adviser
registered under the Investment Advisers Act of 1940, as amended ("Advisers
Act").  GAMCO is an investment manager providing discretionary managed account
services for employee benefit plans, private investors, endowments, foundations
and others.
	GSI, a majority-owned subsidiary of GBL, acts as a general partner or
investment manager to limited partnerships and offshore investment companies
and as a part of its business may purchase or sell securities for its own
account.  It is the immediate parent of Gabelli & Company. GSI is the
Investment Manager of Gabelli Associates Fund, Gabelli Associates Fund II,
Gabelli Associates Limited, ALCE Partners, L.P., and Gabelli Multimedia
Partners, L.P.  GSI and Marc Gabelli own 45% and 55%, respectively, of Gabelli
Securities International Limited ("GSIL"). GSIL provides investment advisory
services to offshore funds and accounts.   GSIL is an investment advisor of
Gabelli International Gold Fund Limited, Gabelli European Partners, Ltd., and
Gabelli Global Partners, Ltd.
	Gabelli & Company, a wholly-owned subsidiary of GSI, is a broker-dealer
registered under the Securities Exchange Act of 1934, as amended ("1934 Act"),
which as a part of its business regularly purchases and sells securities for
its own account.
	Gabelli Funds, a wholly owned subsidiary of GBL, is a limited liability
company. Gabelli Funds is an investment adviser registered under the Advisers
Act which presently provides discretionary managed account services for The
Gabelli Equity Trust Inc., The Gabelli Asset Fund, The Gabelli Growth Fund, The
Gabelli Convertible and Income Securities Fund, Inc., The Gabelli Value Fund
Inc., The Gabelli Small Cap Growth Fund, The Gabelli Equity Income Fund, The
Gabelli ABC Fund, The Gabelli Global Telecommunications Fund, Gabelli Gold
Fund, Inc., The Gabelli Global Multimedia Trust Inc., The Gabelli Global
Convertible Securities Fund, Gabelli Capital Asset Fund, Gabelli International
Growth Fund, Inc., The Gabelli Global Growth Fund, The Gabelli Utility Trust,
The Gabelli Global Opportunity Fund, The Gabelli Utilities Fund, The Gabelli
Blue Chip Value Fund, The Gabelli Mathers Fund, The Gabelli Woodland Small Cap
Value Fund, The Comstock Capital Value Fund and The Comstock Strategy Fund
(collectively, the "Funds"), which are registered investment companies.
	Gabelli Advisers, a subsidiary of GBL, is an investment adviser which
provides discretionary advisory services to The Gabelli Westwood Mighty Mitessm
Fund.
	The Plan, a qualified employee profit sharing plan, covers substantially
all employees of GBL and its affiliates.
	MJG Associates provides advisory services to private investment
partnerships and offshore funds.  Mario Gabelli is the sole shareholder,
director and employee of MJG Associates.   MJG Associates is the Investment
Manager of Gabelli International Limited, Gabelli International II Limited,
Gabelli Performance Partnership, and Gabelli Fund, LDC.
The Foundation is a private foundation.  Mario Gabelli is the President,
a Trustee and the Investment Manager of the Foundation.
	Lynch is a public company traded on the American Stock Exchange engaged
in manufacturing.  Interactive is a public company listed on the American Stock
Exchange and is a holding company with operating subsidiaries engaged primarily
in the rural telephone industry.  Lynch and Interactive actively pursue new
business ventures and acquisitions. Lynch and Interactive make investments in
marketable securities to preserve capital and maintain liquidity for financing
their business activities and acquisitions and are not engaged in the business
of investing, reinvesting, or trading in securities.  Mario J. Gabelli is a
director, officer and a substantial shareholder of Lynch and Interactive.
	Mario Gabelli is the majority stockholder and Chairman of the Board of
Directors and Chief Executive Officer of Gabelli Partners and GBL, and the
Chief Investment Officer for each of the Reporting Persons.  Gabelli Partners
is the majority shareholder of GBL. GBL, in turn, is the sole stockholder of
GAMCO.  GBL is also the majority stockholder of GSI and the largest shareholder
of Gabelli Advisers.  Gabelli & Company is a wholly-owned subsidiary of GSI.
	The Reporting Persons do not admit that they constitute a group.
	Gabelli Partners, GBL, GAMCO, and Gabelli & Company are New York
corporations and GSI and Gabelli Advisers are Delaware corporations, each
having its principal business office at One Corporate Center, Rye, New York
10580.  Gabelli Funds is a New York limited liability company having its
principal business office at One Corporate Center, Rye, New York 10580.  MJG
Associates is a Connecticut corporation having its principal business office at
140 Greenwich Avenue, Greenwich, CT 06830.  The Foundation is a Nevada
corporation having its principal offices at 165 West Liberty Street, Reno,
Nevada 89501.  Lynch is an Indiana corporation having its principal business
office at 50 Kennedy Plaza, Suite 1250, Providence, Rhode Island 02903.
Interactive is a Delaware corporation having its principal place of business at
One Corporate Center, Rye, New York 10580.
	For information required by instruction C to Schedule 13D with respect to
the executive officers and directors of the foregoing entities and other
related persons (collectively, "Covered Persons"), reference is made to
Schedule I annexed hereto and incorporated herein by reference.
		(f)  - Reference is made to Schedule I hereto.

Item 5.		Interest In Securities Of The Issuer
		Item 5 to Schedule 13D is amended, in pertinent part, as follows:
(a) The aggregate number of Securities to which this Schedule 13D
relates is 2,232,978 shares, representing 6.87% of the 32,494,719 shares
outstanding as reported on the Issuer's 10-Q for the quarter ended March 31,
2003.  The Reporting Persons beneficially own those Securities as follows:

Name

Shares of
Common Stock
% of Class of
Common
Gabelli Funds

698,000
2.15%
GAMCO
1,534,978

4.72%

Mario J. Gabelli
0

0.00%


		Mario Gabelli is deemed to have beneficial ownership of the
Securities owned beneficially by each of the foregoing persons. GSI is deemed
to have beneficial ownership of the Securities beneficially owned by Gabelli &
Company.  GBL and Gabelli Partners are deemed to have beneficial ownership of
the Securities owned beneficially by each of the foregoing persons other than
Mario Gabelli and the Foundation.
(b) Each of the Reporting Persons and Covered Persons has the sole
power to vote or direct the vote and sole power to dispose or to direct the
disposition of the Securities reported for it, either for its own benefit or
for the benefit of its investment clients or its partners, as the case may be,
except that (i) GAMCO does not have the authority to vote 28,750 of the
reported shares, (ii) Gabelli Funds has sole dispositive and voting power with
respect to the shares of the Issuer held by the Funds so long as the aggregate
voting interest of all joint filers does not exceed 25% of their total voting
interest in the Issuer and, in that event, the Proxy Voting Committee of each
Fund shall respectively vote that Fund's shares, (iii) at any time, the Proxy
Voting Committee of each such Fund may take and exercise in its sole discretion
the entire voting power with respect to the shares held by such fund under
special  circumstances such as regulatory considerations, and (iv) the power of
Mario Gabelli, GBL, and Gabelli Partners is indirect with respect to Securities
beneficially owned directly by other Reporting Persons.
		(c) Information with respect to all transactions in the Securities
which were effected during the past sixty days or since the most recent filing
on Schedule 13D, whichever is less, by each of the Reporting Persons and
Covered Persons is set forth on Schedule II annexed hereto and incorporated
herein by reference.
		(e) Not applicable.




Signature
	After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
Dated:	July 16, 2003

MARIO J. GABELLI




By:/s/ James E. McKee
	James E. McKee
	Attorney-in-Fact


GABELLI FUNDS, LLC
GABELLI GROUP CAPITAL PARTNERS, INC.
GABELLI ASSET MANAGEMENT INC.




By:/s/ James E. McKee
	James E. McKee
	Secretary


GAMCO INVESTORS, INC.




By:/s/ Douglas R. Jamieson
	Douglas R. Jamieson
	Executive Vice President


SCHEDULE I

Information with Respect to Executive
Officers and Directors of the Undersigned

		Schedule I to Schedule 13D is amended, in pertinent part, as
follows:

The following sets forth as to each of the executive officers and
directors of the undersigned: his name; his business address; his
present principal occupation or employment and the name, principal
business and address of any corporation or other organization in
which such employment is conducted.  Unless otherwise specified,
the principal employer of each such individual is Gabelli Group
Capital Partners, Inc., Gabelli Asset Management Inc., Gabelli
Funds, LLC, Gabelli & Company, Inc., or GAMCO Investors, Inc., the
business address of each of which is One Corporate Center, Rye, New
York 10580, and each such individual identified below is a citizen
of the United States.  To the knowledge of the undersigned, during
the last five years, no such person has been convicted in a
criminal proceeding (excluding traffic violations or similar
misdemeanors), and no such person was a party to a civil proceeding
of a judicial or administrative body of competent jurisdiction as a
result of which he was or is subject to a judgment, decree or final
order enjoining future violations of, or prohibiting or mandating
activities subject to, federal or state securities law or finding
any violation with respect to such laws except as reported in Item
2(d) of this Schedule 13D.

Gabelli Group Capital Partners,
Inc.
Directors:

	Mario J. Gabelli

Chief Executive Officer and Chief Investment
Officer of Gabelli Group Capital Partners, Inc.,
Gabelli Asset Management Inc., and GAMCO
Investors, Inc.; Director/Trustee of all
registered investment companies advised by Gabelli
Funds, LLC; Chief Executive Officer of Lynch
Interactive Corporation; Vice Chairman of Lynch
Corporation.

	Charles C. Baum





Chairman and Director of The Morgan Group, Inc.;
Secretary & Treasurer
United Holdings Co., Inc.
2545 Wilkens Avenue
Baltimore, MD   21223


Frederic V. Salerno
Chairman
Lynch Interactive Corporation


	Arnold M. Reichman
Business Consultant

	Marc J. Gabelli

Managing Director

	Matthew R. Gabelli

Vice President - Trading
Gabelli & Company, Inc.
One Corporate Center
Rye, New York 10580
Officers:

	Mario J. Gabelli
Chairman, Chief Executive Officer and Chief
Investment Officer
	Henry Kiernan
Vice President, Chief Financial Officer

	James E. McKee

Vice President, General Counsel and Secretary

Gabelli Asset Management
Inc.
Directors:

	Raymond C. Avansino,
Jr.
Chairman
E.L. Wiegand Foundation
165 West Liberty Street
Reno, NV 89501

	Mario J. Gabelli

See above



	Paul B. Guenther

Chairman
New York Philharmonic
10 Lincoln Center Plaza
New York, NY 10023

	John C. Ferrara
Business Consultant

	Dr. Eamon M. Kelly
Professor
Payson Center for International
Development Technology Transfer
Tulane University
300 Gibson Hall
6823 St. Charles Avenue
New Orleans, LA   70118

	Karl Otto Pohl (1)
Sal. Oppenheim jr. & Cie.
Bockenheimer Landstrasse 20
D-6000 FRANKFURT AM MAIN
Germany

Officers:



	Mario J. Gabelli


Chairman, Chief Executive Officer and Chief
Investment Officer

	Robert S. Zuccaro
Vice President and Chief Financial Officer

	James E. McKee

Vice President, General Counsel and Secretary

GAMCO Investors, Inc.
Directors:


	Douglas R. Jamieson
	Joseph R. Rindler,
Jr.
	Regina M. Pitaro
	F. William Scholz, II
	William S. Selby


Officers:


	Mario J. Gabelli
Chief Executive Officer and Chief Investment
Officer

	Joseph R. Rindler,
Jr.
Chairman

	Douglas R. Jamieson
Executive Vice President and Chief Operating
Officer

	Robert S. Zuccaro
Vice President and Chief Financial Officer

	James E. McKee

Vice President, General Counsel and Secretary
Gabelli Funds, LLC
Officers:


	Mario J. Gabelli

Chief Investment Officer
	Bruce N. Alpert
Executive Vice President and Chief Operating
Officer

	Gus Coutsouros
Vice President and Chief Financial Officer

	James E. McKee
Secretary

Gabelli Advisers, Inc.
Directors:


	Bruce N. Alpert
	John D. Gabelli
	Joseph R. Rindler.
Jr.


Officers:


	Bruce N. Alpert
Chief Operating Officer

               Gus
Coutsouros

Chief Financial Officer
	James E. McKee
Secretary


Gabelli Securities, Inc.


Directors:


	Robert W. Blake
President of W. R. Blake & Sons, Inc.
196-20 Northern Boulevard
Flushing, NY   11358

	Douglas G. DeVivo
General Partner of ALCE Partners, L.P.
One First Street, Suite 16
Los Altos, CA   94022

	Joseph R. Rindler,
Jr.
See above

Officers:


	Robert S. Zuccaro
Vice President-Finance

	James E. McKee
Secretary

Gabelli & Company, Inc.
Directors:


	James G. Webster, III
Chairman & Interim President

	Irene Smolicz
Senior Trader
Gabelli & Company, Inc.

	Robert S. Zuccaro
See above

Officers:


	James G. Webster, III
Chairman & Interim President

	Bruce N. Alpert
Vice President - Mutual Funds

	Walter K. Walsh
Compliance Officer

	James E. McKee
Secretary


Lynch Corporation,
50 Kennedy Plaza, Suite 1250, Providence, RI 02903

Directors:


	Mario J. Gabelli
See above - Gabelli Group Capital Partners, Inc.

	E. Val Cerutti
Business Consultant, Cerutti Consultants
227 McLain Street
Mount Kisco, NY   10540

	Avrum Gray



              Ralph R. Papitto

              Richard E. McGrail

              Raymond H. Keller

              Anthony R.
Pustorino
Gbar Limited Partnership
440 South LaSalle, Suite 2900
Chicago, IL 60605

Chairman and Chief Executive Officer

President and Chief Operations Officer

Vice President and Chief Financial Officer

Professor Emeritus
Pace University
1 Martine Avenue
White Plains, NY 10606

Officers:



	Ralph R. Papitto

See above
	Mario J. Gabelli
Vice Chairman

	Richard E. McGrail
See above

	Raymond H. Keller
See above



Lynch Interactive Corporation,
401 Theodore Fremd Avenue Rye, NY 10580


Directors:


	Paul J. Evanson
President
Florida Light & Power Co.
P.O. Box 14000
700 Universe Blvd.
Juno Beach, FL 33408

	Mario J. Gabelli
See above - Gabelli Group Capital Partners, Inc.

	Salvatore Muoio
Principal
S. Muoio & Co., LLC
Suite 406
509 Madison Ave.
New York, NY 10022

	John C. Ferrara
See above

	David C. Mitchell
Business Consultant
c/o Lynch Interactive Corporation
401 Theodore Fremd Ave.
Rye, NY 10580

	Vincent S. Tese
Lawyer, Investment Adviser and Cable Television
Executive
c/o Bear Stearns & Company, Inc.
245 Park Avenue, 19th Floor
New York, NY 10167


Frederic V. Salerno

Chairman

Officers:


	Mario J. Gabelli
Vice Chairman and Chief Executive Officer

	Robert E. Dolan

               Joseph C. Farina

Chief Financial Officer

President and Chief Operating Officer
               John Fikre

Vice President - Corporate Development, General
Counsel, and Secretary

	(1) Citizen of Germany

	(2) Citizen of the Cayman Islands

	(3) Citizen of Bermuda

	(4) Citizen of Bermuda and Canada

	(5) Citizen of the UK

	(6) Citizen of Switzerland

	(7) Citizen of Italy

								SCHEDULE II

                                      INFORMATION WITH RESPECT TO
                           TRANSACTIONS EFFECTED DURING THE PAST SIXTY DAYS OR
                           SINCE THE MOST RECENT FILING ON SCHEDULE 13D (1)

                                             SHARES PURCHASED        AVERAGE
                                  DATE            SOLD(-)             PRICE(2)

           COMMON STOCK-IDEX CORP

                    GAMCO INVESTORS, INC.
                                 7/15/03            5,000-           35.9928
                                 7/08/03              300-           36.3400
                                 7/07/03            5,000-           36.3904
                                 7/07/03            4,000-           36.4038
                                 7/01/03            2,000-           35.5340
                                 6/30/03              546-           36.2600
                                 6/27/03            1,204-           35.8000
                                 6/26/03            1,250-           35.5260
                                 6/25/03              500-           35.7000
                                 6/25/03            1,000-           35.7640
                                 6/23/03              800-           36.2375
                                 6/19/03            1,000-           36.5050
                                 6/18/03            2,000-           36.0370
                                 6/18/03            3,000-           36.1407
                                 6/17/03            3,000-           35.9233
                                 6/17/03            2,000-           36.0375
                                 6/16/03            2,000-           35.6060
                                 6/16/03              500-           35.3800
                                 6/13/03            5,000-           35.4940
                                 6/11/03            3,000-           34.9613
                                 6/11/03            1,500            34.9613
                                 6/09/03            1,900-           35.0884
                                 6/06/03              500-             *DO
                                 6/06/03            1,000-           35.7000
                                 6/05/03              500-           35.2600
                                 6/03/03            1,000-           34.2000
                                 6/02/03            1,000-           34.5750
                                 5/29/03            5,000-           33.2774
                                 5/29/03            1,000-           33.4300
                                 5/29/03               40-             *DO
                                 5/29/03            1,260-             *DO
                                 5/28/03            1,000-           33.3040
                                 5/27/03            1,000-           32.2500
                                 5/21/03            3,000-           32.0880
                                 5/19/03            2,000-           32.1650
					   5/16/03            1,000-           32.7510
                     GABELLI FUNDS, LLC.
                          GABELLI EQUITY TRUST
                                 6/06/03            5,000-           35.8404
                                 5/29/03            5,000-           33.2977
                                 5/28/03            3,000-           32.9247
                                 5/27/03            2,000-           32.3693
                                 5/16/03            1,300-           32.8069
                         GABELLI ASSET FUND
                                 7/15/03            4,000-           35.7800
                                 7/14/03            4,000-           35.7605
                                 5/29/03            2,000-           33.2977
                                 5/19/03            1,000-           32.4250
                         GABELLI CAPITAL ASSET FUND
                                 5/27/03            1,000-           32.3693


          (1) UNLESS OTHERWISE INDICATED, ALL TRANSACTIONS WERE EFFECTED
              ON THE NYSE.

          (2) PRICE EXCLUDES COMMISSION.

          (*) RESULTS IN CHANGE OF DISPOSITIVE POWER AND BENEFICIAL OWNERSHIP.