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 (Date of earliest event reported): October 28, 2004

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

                                    Delaware
                 (State or other jurisdiction of incorporation)

         0-27316                                           94-2914362
(Commission File Number)                       (IRS Employer Identification No.)

                               1311 Orleans Drive
                               Sunnyvale, CA 94089
          (Address of Principal Executive Offices, including Zip Code)

       Registrant's telephone number, including area code: (408) 747-1700

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Item 2.02. Results of Operations and Financial Condition.

On October 28, 2004, Molecular Devices Corporation ("Molecular Devices")
reported its financial results for the quarter ended September 30, 2004. A copy
of the press release issued by Molecular Devices on October 28, 2004 concerning
the foregoing results is furnished herewith as Exhibit 99.1 and is incorporated
herein by reference.

The information in this report, including the exhibit hereto, shall not be
deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act
of 1934, as amended, or otherwise subject to the liabilities of that Section or
Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended. The
information contained herein and in the accompanying exhibit shall not be
incorporated by reference into any filing with the U.S. Securities and Exchange
Commission made by Molecular Devices, whether made before or after the date
hereof, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits

(c)   Exhibit

            99.1  Press release dated October 28, 2004, entitled "Molecular
                  Devices Reports Record Revenues and Earnings for Third Quarter
                  of 2004", issued by Molecular Devices.

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                                    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, thereunto duly authorized.

                                             MOLECULAR DEVICES CORPORATION

Dated: October 28, 2004                      By: /s/ Timothy A. Harkness
                                                 -------------------------------
                                                 Timothy A. Harkness
                                                 Senior Vice President and Chief
                                                 Financial Officer

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                                     Exhibit

99.1  Press release dated October 28, 2004, entitled "Molecular Devices Reports
      Record Revenues and Earnings for Third Quarter of 2004", issued by
      Molecular Devices.