Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Thermo Fisher Scientific Inc. (formerly Thermo Electron Corporation) Registration Statement Nos. 33-37867, 33-51189, 33-54347, 33-54453, 33-61561, 333-90761, 333-90823, 333-48432, 333-43702, 333-43698, 333-40578, 333-40576, 333-33070, 333-33068, 333-33064, 333-33058, 333-33066, 333-33060, 333-33072, 333-62004, 333-76670, 333-83470, 333-127246, and 333-134868 on Form S-8 of our report dated February 17, 2006 (May 11, 2006 as to the effect of the Laboratory Workstations discontinued operations described in Notes 2 and 3 and the subsequent events described in Note 23), relating to the consolidated financial statements and financial statement schedule of Fisher Scientific International Inc. appearing in the Current Report on Form 8-K of Fisher Scientific International Inc. filed May 11, 2006 and our report dated February 17, 2006 on management’s report on the effectiveness of internal control over financial reporting appearing in the Annual Report on Form 10-K of Fisher Scientific International Inc. for the year ended December 31, 2005 and incorporated by reference in the Current Report on Form 8-K of Thermo Fisher Scientific Inc. dated November 14, 2006.

/s/ Deloitte & Touche LLP
New York, New York
November 14, 2006