8-K

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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: DECEMBER 4, 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 7.01 -- Regulation FD Disclosure.

On December 4, 2006, IDEX Corporation issued a press release announcing the
acquisition of Toptech Systems, Inc., a leading provider of terminal automation
systems used in the custody transfer and control of high value fluids and gases.
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.

(d)  Exhibits

     99.1    Press release dated December 4, 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

December 6, 2006





                                  EXHIBIT INDEX

EXHIBIT
NUMBER            DESCRIPTION
- ------            -----------

99.1              Press release dated December 4, 2006

EX-99.1

                                                                    EXHIBIT 99.1


                 IDEX CORPORATION ACQUIRES TOPTECH SYSTEMS, INC.

NORTHBROOK, IL, DECEMBER 4, 2006 -- IDEX CORPORATION (NYSE: IEX) today announced
the acquisition of Toptech Systems, Inc., a leading provider of terminal
automation systems used in the custody transfer and control of high value fluids
and gases. Based in Longwood, Florida, with revenues of approximately $22
million, Toptech's products include terminal automation hardware and software
used by customers in the oil, gas and refined fuels markets to control and
manage inventories, as well as transactional data and invoicing. Toptech will be
operated as part of the company's Liquid Controls business within its Fluid &
Metering Technologies segment. Terms of the transaction were not disclosed.

Commenting on the acquisition, IDEX Chairman and Chief Executive Officer Larry
Kingsley said, "We are extremely pleased by Toptech's decision to become part of
IDEX. Toptech's expertise in terminal automation and management is highly
complementary to our precision metering capability and growth within the oil,
gas and alternative fuels markets. With the addition of Toptech, IDEX will now
offer a robust platform of controls complementing our market-leading products
which enable our customers to move, measure, and dispense high value fluids
anywhere in the world."

Toptech founders, Doug Dunlap and Jay Barnhill, stated, "We are excited to
become a part of IDEX and its Fluid and Metering Technologies business. IDEX is
a recognized leader in applied engineered solutions whose global footprint will
greatly enhance our ability to serve the needs of our customers. Together, we
will offer a complete end-to-end terminal management solution ensuring the safe,
productive and energy efficient transfer of all custody control fluids, as well
as the integrity of our customers' data management processes."

ABOUT IDEX
IDEX Corporation is an applied solutions company specializing in fluid and
metering technologies, health and science technologies, dispensing equipment,
and fire, safety and other diversified products built to its customers' exacting
specifications. Its products are sold in niche markets to a wide range of
industries throughout the world. IDEX shares are traded on the New York Stock
Exchange and Chicago Stock Exchange under the symbol "IEX".