Mocon (MOCO) 10-K 2009 FY Annual report

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of MOCON, Inc. on Form 10-K for the fiscal year ended December 31, 2009 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Robert L. Demorest, Chief Executive Officer of MOCON, Inc., hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, to the best of my knowledge:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

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

Date: March 30, 2010

/s/ Robert L. Demorest

Robert L. Demorest

Chief Executive Officer