Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated February 12, 2009 relating to the financial statements, financial statement schedules and the effectiveness of internal control over financial reporting, which appears in Mettler-Toledo International Inc.’s Annual Report on Form 10-K for the year ended December 31, 2008. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP Columbus, Ohio

May 12, 2009