EXHIBIT 32.2

                    CERTIFICATION OF CHIEF FINANCIAL OFFICER

      Pursuant to 18 U.S.C. Section 1350, as created by Section 906 of the
Sarbanes-Oxley Act of 2002, the undersigned officer of IDEX Corporation (the
"Company") hereby certifies, to such officer's knowledge, that:

      (i) The accompanying Annual Report on Form 10-K of the Company for the
      annual period ended December 31, 2004 (the "Report") fully complies with
      the requirements of Section 13(a) or Section 15(d), as applicable, of the
      Securities Exchange Act of 1934, as amended; and

      (ii) The information contained in the Report fairly presents, in all
      material respects, the financial condition and results of operations of
      the Company.

February 25, 2005                    /s/ Dominic A. Romeo
                                     -------------------------------------------
                                     Dominic A. Romeo
                                     Vice President and Chief Financial Officer