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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             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: APRIL 20, 2006
                        (Date of earliest event reported)

                                IDEX CORPORATION
             (Exact name of registrant as specified in its charter)


                                                       
   DELAWARE                        1-10235                        36-3555336
   (State of              (Commission File Number)              (IRS Employer
Incorporation)                                               Identification No.)


                                 630 DUNDEE ROAD
                           NORTHBROOK, ILLINOIS 60062
          (Address of principal executive offices, including zip code)

                                 (847) 498-7070
              (Registrant's telephone number, including area code)

     Check the appropriate box if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

[ ]  Written communications pursuant to Rule 425 under the Securities Act (17
     CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17
     CFR 240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))

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Item 2.02 - Results of Operations and Financial Condition.

The information in this Item is furnished to, but not filed with, the Securities
and Exchange Commission solely under Item 2.02 of Form 8-K, "Results of
Operations and Financial Condition."

On April 20, 2006, IDEX Corporation issued a press release announcing financial
results for the quarter ended March 31, 2006. A copy of the press release is
furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated
herein by reference.

Item 9.01 - Financial Statements and Exhibits.

(c)  Exhibits

     99.1 Press release dated April 20, 2006



                                    SIGNATURE

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.

                                        IDEX CORPORATION


                                        By: /s/ Dominic A. Romeo
                                            ------------------------------------
                                            Dominic A. Romeo
                                            Vice President and Chief Financial
                                            Officer

April 20, 2006



                                  EXHIBIT INDEX



EXHIBIT
 NUMBER   DESCRIPTION
-------   -----------
       
99.1      First quarter 2006 earnings release dated April 20, 2006