TMO 10-k 2006 Exhibit 23 (PwC Consent)

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 33-37867, 33-51189, 33-54347, 33-54453, 33-61561, 333-90761, 333-90823, 333-48432, 333-43698, 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 333-138577) of Thermo Fisher Scientific Inc. of our report dated February 28, 2007 relating to the consolidated financial statements, financial statement schedule, management’s assessment of the effectiveness of internal control over financial reporting and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.