Scientific & Technical Instruments

EURO TECH HOLDINGS CO LTD
_____________

CYBEROPTICS CORP
_____________

FINDER'S AGREEMENT

    This Finder's Agreement (the "Agreement") is entered into as of August 14, 2001, ("Effective Date") between Microvision, Inc., a Washington corporation ("Company"), and Brookehill Capital Partners ("Finder").

RECITALS

    WHEREAS, Finder represents that he will endeavor to introduce the Company to Prospective Investors (as defined in Section 2.2 below) who may be interested in participating in a private placement of the Company's securities (the "Offering"); and

    WHEREAS, the Company desires to engage the services of Finder to provide an introduction to such Prospective Investors in accordance with the terms and conditions set forth in this Agreement.

AGREEMENT

    NOW, THEREFORE, in consideration of the promises and mutual covenants hereinafter contained, and for other good and valuable consideration, the sufficiency of which is hereby acknowledged, the parties agree as follows:

    1.  Engagement.  

    1.1   The Company engages Finder to provide services on a non-exclusive basis to assist the Company in identifying Prospective Investors interested in participating in the Offering, and to use his best efforts to introduce Company to such Prospective Investors (the "Services").

    1.2   Finder shall perform the Services in a manner that complies with applicable federal and state securities laws. Finder shall take no action that could limit or otherwise adversely affect the ability of the Company to claim an exemption from the registration or qualification requirements of applicable securities laws with respect to the Offering, and in particular will not take any action that could be construed as constituting a general solicitation or general advertising by the Company, as such terms are used in Rule 502 of Regulation D under the Securities Act of 1933, as amended (the "Securities Act").

    2.  Identification of Prospective Investors.  

    2.1   In order to coordinate the Company's and Finder's respective efforts during the period of engagement hereunder, Finder will from time to time notify the Company of Prospective Investors that he proposes to contact. Once Finder has identified a Prospective Investor to Company, Finder shall not identify additional Prospective Investors until either (a) the Company advises Finder, at its discretion, that it is not interested in being introduced to the Prospective Investor proposed by Finder, or (b) the Company requests that Finder identify additional Prospective Investors. If the Company informs Finder that it is interested in being introduced to a Prospective Investor, Finder will introduce representatives of the Company to the Prospective Investor. Finder will not make any contact with a Prospective Investor unless such contact is expressly approved by the Company.

    2.2   For purposes of this Agreement, "Prospective Investors" shall mean "accredited investors," as such term is defined in Rule 501 of Regulation D under the Securities Act, who are introduced to the Company by Finder at the Company's request. Prospective Investors shall not include any persons who are current shareholders, officers, directors, consultants or employees of the Company or their respective family members, nor any person who has previously expressed an interest in participating in the Offering, directly or indirectly, such that the Company is already aware of such interest.

G.M. CAPITAL PARTNERS, LTD.

September 9, 2003

Invisa, Inc.
Attention: Stephen Michael, President
4400 Independence court
Sarasota, FL 34234

Dear Mr. Michael:

This letter confirms the engagement agreement (the Agreement) between G.M. Capital Partners, Ltd. (GMC) and Invisa, Inc. a Nevada corporation, (hereinafter Invisa or the Company) pursuant to which GMC will furnish management consulting, financial advisory and investor relations services. GMC will assist Invisa in the capacity as detailed below.

1. RESPONSIBILITY OF GMC

A.     Subject to the terms and conditions hereof, GMC services will include, among other things, a due diligence overview of the Company including; reviewing Invisas current financial position and projections relating to Invisas capital requirements, analyzing the proforma effects of the financing on such projections, and rendering advice on methods of structuring such financing (Financing).

B.     It is expressly acknowledged and agreed by the parties hereto that GMCs obligations do not insure the successful negotiation of or obtaining of any type of Financing for Invisa and any efforts for obtaining Financing shall be on a best efforts basis only. GMC is not a registered broker dealer.

C.     The central task of GMC will be attracting suitable entities that are in the business of, or interested, in making equity or debt investments in companies such as Invisa. GMCs role will include assisting the Company in proposing an equity or debt investment in Invisa to prospective investors, presenting Invisas analysis in support of the investment, and structuring and negotiating the financial terms of the investment.

D.     We will also assist in the coordination of the many parties involved and attend


160739

      This Consulting Agreement (the "Agreement") is made and entered into this
26th day of January, 2004 by and between Invisa, Inc. a Nevada corporation, (the
"Company") and Stephen A. Michael (the "Consultant").

                                    RECITALS

      WHEREAS, the Consultant is the co-founder of the Company and has been
employed by the Company since February 9, 2000 and is a member of its Board of
Directors; and

      WHEREAS, the Consultant's employment with the Company terminates effective
January 31, 2004 and the Company and Consultant have  . . .

                     NATIONAL FINANCIAL COMMUNICATIONS CORP

                              CONSULTING AGREEMENT


         AGREEMENT made as of the 9th day of July, 2003 by and between Invisa
Inc., maintaining its principal offices at 4400 Independence Court, Sarasota, FL
34234 (hereinafter referred to as "Client") and National Financial
Communications Corp. DBA/ OTC Financial Network, a Commonwealth of Massachusetts
corporation maintaining its principal offices at 300 Chestnut St, Suite 200,
Needham, MA 02492 (hereinafter referred to as the "Company").

                     . . .

                              CONSULTING AGREEMENT

         THIS CONSULTING AGREEMENT is made as of July 22, 2003 by and between
Invisa, Inc., a Nevada corporation with its principal place of business in
Sarasota, Florida (the "Corporation") and Patrick W. H. Garrard d/b/a The
Garrard Group of West Redding CT ("Consultant Company").

                                R E C I T A L S:

         WHEREAS, the Corporation is a publicly traded company; and

         WHEREAS, the Consultant Company is a firm providing investor, public,
trade and media relations services and  . . .

                               JAMES C. TRIPLETT
                               -----------------


     This is a Consulting Agreement ("Agreement") made on May 15, 2001 by Fluke
Electronics Corporation, a corporation organized under Washington law and having
its principal offices at 6920 Seaway Boulevard, P.O. Box 9090, Everett,
Washington 98206-9090 ("Fluke") and James C. Triplett ("Triplett"), a resident
of the state of Utah.

     Danaher Corporation, the parent of Fluke, has entered into an Agreement and
Plan of Merger dated as of May 15, 2001 with Saltwater  . . .

                              DAVID K. LIFSCHULTZ
                              -------------------



     This is a Consulting Agreement made on May 15, 2001 by Fluke Electronics
Corporation, a corporation organized under Washington law and having its
principal offices at 6920 Seaway Boulevard, P.O. Box 9090, Everett, Washington
98206-9090 ("Fluke") and David K. Lifschultz ("Lifschultz"), a resident of the
state of New York.

     Danaher Corporation, the parent of Fluke, has entered into an Agreement and
Plan of Merger dated as of May 15, 2001 with Saltwater Acquisition  . . .

                              CONSULTING AGREEMENT

     This Consulting Agreement (the "Agreement") is entered into on January 4,
2001, by and between Pollution Research and Control Corp., 506 Paula Avenue,
Glendale, California 91201 (the "Company"), and Silverline Partners, Ltd., 27
Wellington Road, Cork, Ireland (the "Consultant").

     WHEREAS, the Company desires to explore and obtain business opportunities
in the countries of the United Kingdom, France, Germany, Italy and Spain for
purposes, among others, locating strategic partners having  . . .