EXHIBIT 99



      CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
                                   PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


I, Robert L. Demorest, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, the Annual
Report of MOCON, Inc. on Form 10-K for the annual period ended December 31, 2002
fully complies with the requirements of Section 13(a) or 15(d) of the Securities
Exchange Act of 1934 and that information contained in such Form 10-K fairly
presents in all material respects the financial condition and results of
operations of MOCON, Inc. A signed original of this written statement required
by Section 906 has been provided to MOCON, Inc. and will be retained by MOCON,
Inc. and furnished to the Securities and Exchange Commission or its staff upon
request.



                                       By: /s/ Robert L. Demorest
                                          ---------------------------------
                                       Name:  Robert L. Demorest
                                       Title: Chief Executive Officer


I, Dane D. Anderson, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual
Report of MOCON, Inc. on Form 10-K for the annual period ended December 31, 2002
fully complies with the requirements of Section 13(a) or 15(d) of the Securities
Exchange Act of 1934 and that information contained in such Form 10-K fairly
presents in all material respects the financial condition and results of
operations of MOCON, Inc. A signed original of this written statement required
by Section 906 has been provided to MOCON, Inc. and will be retained by MOCON,
Inc. and furnished to the Securities and Exchange Commission or its staff upon
request.


                                       By: /s/ Dane D. Anderson
                                          ---------------------------------
                                       Name:  Dane D. Anderson
                                       Title: Chief Financial Officer