Exhibit 23.1

              CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS

We have issued our report dated May 30, 2003, accompanying the consolidated
balance sheets of Invisa, Inc. as of December 31, 2001 and 2002 and the related
consolidated statements of operations, stockholders' equity and cash flows for
each of the years then ended and the period February 12, 1997 (date of
inception) through December 31, 2002, contained in the Registration Statement
and Prospectus, which report contains an explanatory paragraph relating
to certain significant risks and uncertainties which conditions raise
substantial doubt about the Company's ability to continue as a going concern.
We consent to the use of the aforementioned report in the Registration
Statement and Prospectus, and to the use of our name as it appears under the
caption "Experts".

/s/ GRANT THORNTON LLP


Tampa, Florida
June 24, 2003