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                                                                   EXHIBIT 10.53


         "THE WARRANTS AND THE SHARES THAT MAY BE PURCHASED UPON THE EXERCISE
OF THE WARRANTS COLLECTIVELY REFERRED TO AS THE ("SHARES") REPRESENTED BY THIS
CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED ("ACT"). SUCH SHARES HAVE BEEN ACQUIRED FOR INVESTMENT AND MAY NOT BE
PUBLICLY OFFERED OR SOLD IN THE ABSENCE OF (1) AN EFFECTIVE REGISTRATION
STATEMENT FOR SUCH SHARES UNDER THE ACT; (2) OPINIONS OF COUNSEL TO INVISA,
INC., PRIOR TO ANY PROPOSED TRANSFER TO THE EFFECT THAT REGISTRATION IS NOT
REQUIRED UNDER THE ACT; OR (3) A LETTER PRESENTED TO INVISA INC., PRIOR TO
ANY PROPOSED TRANSFER, FROM THE STAFF OF THE SECURITIES AND EXCHANGE
COMMISSION, TO THE EFFECT THAT IT WILL NOT TAKE ANY ENFORCEMENT ACTION IF THE
PROPOSED TRANSFER IS MADE WITHOUT REGISTRATION UNDER THE ACT."


Void after August 15, 2004

WARRANT CERTIFICATE FOR PURCHASE OF COMMON STOCK


NUMBER                                                          NO. OF WARRANTS
WA 1                           INVISA, INC.                          67,000
   -                                                                 ------


         This certifies that FOR VALUE RECEIVED DELBRUECK BANK or registered
assigns (the "Registered Holder") is the owner of SIXTY SEVEN THOUSAND Warrants
(the "Warrants"). Each Warrant represented hereby entitles the Registered
Holder to purchase, subject to the terms and conditions set forth in this
Warrant Certificate, one fully paid and non-assessable share of Common Stock,
$0.001 value ("Common Stock"), of Invisa, Inc., a Nevada corporation (the
"Company"), from the date hereof until August 15, 2004, (the "Expiration
Date"), upon the presentation and surrender of this Warrant Certificate
together with the full payment of the Exercise Price in effect on the date on
which written notice of exercise is delivered to the Company as provided
herein. Payment of the Exercise Price must be in the form of lawful money of
the United States delivered by certified, bankers check or other form
acceptable to the Company and delivered to the corporate office of the Company
at 4400 Independence Court, Sarasota, Florida 34234. The exercise price of each
Warrant (the "Exercise Price") is: (i) $5.00 per share until August 15, 2003
(the "Initial Warrant Year") And (ii) From August 16, 2003 to August 15, 2004
(the "Second Warrant Year") the greater of: (i) the average closing trading
price for the Company's common stock during the Initial Warrant Year, or (ii)
$8.00 per share.

The Warrants are redeemable at the option of the Company at $0.10 per warrant
upon 30 days notice to the Registered Holder. In order for the Company to
exercise its right to redeem: during the Initial Warrant Year the Company's
common stock must have traded for 20 consecutive trading days at a closing
trading price above $10.00 per share, or during the Second Warrant Year the
Company's common stock must have traded for 20 consecutive trading days at a
closing trading price above $16.00 per share.

Any Warrants not timely exercised or redeemed automatically expire on August
15, 2004 ("Expiration Date").

The grant of this Warrant is made without registration under the Securities Act
of 1933 as amended (the "Act") by reason of a specific exemption. The Warrants
and Shares to be issued at exercise shall be restricted as to transfer in
accordance with Regulation S and/or Rule 144 of the


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Act, whichever shall be applicable and Shares acquired upon the exercise of the
Warrants will bear a restrictive legend as to transfer in accordance with the
Act.

In the event of a stock dividend or stock split resulting in the number of
outstanding of shares of the Company being changed, the applicable exercise
price, number of shares, redemption price and trading price requirements for
redemption, as provided in the Warrants, shall be proportionately adjusted. In
the event of the merger, consolidation, or combination of the Company into
another company or entity which survives that transaction, the shares which may
be purchased under the Warrants shall be converted into an equivalent number of
shares of the surviving entity. In the event of the sale of all or
substantially all of the assets of the Company, the shares which may be
purchased upon the exercise of the Warrants shall be treated in any
distribution as if said shares are issued and outstanding, with the exception
that the exercise price under the Warrants shall be deducted from the amount to
be distributed on a per-share basis. The Registered Holders of Warrants shall
not be entitled to vote or exercise other rights of stockholders unless and
until the Warrants are exercised and the underlying Shares issued. In the event
of redemption by the Company, each Registered Holder shall be provided 30 days
prior written notice of the Company's intent to redeem, during which notice
period the Registered Holder of the Warrant shall be entitled to exercise the
Warrant.

         In the case of the exercise of less than all the Warrants represented
hereby, the Company shall cancel this Warrant Certificate upon the surrender
hereof and shall execute and deliver a new Warrant Certificate or Warrant
Certificates of like tenor for the balance of such Warrants.

         Prior to due presentment for registration of transfer hereof, the
Company may deem and treat the Registered Holder as the absolute owner hereof
and of each Warrant represented hereby (notwithstanding any notations of
ownership or writing hereon made by anyone other than a duly authorized officer
of the Company) for all purposes and shall not be affected by any notice to the
contrary.

         This Warrant Certificate shall be governed by and construed in
accordance with the laws of the State of Florida.

         This Warrant Certificate and the Registered Holder's rights hereunder
are not assignable or transferable by the Registered Holder except in
accordance with the Act and with the written consent of the Company which will
not be unreasonably withheld.

         IN WITNESS WHEREOF, the Company has caused this Warrant Certificate to
be duly executed by two of its officers thereunto duly authorized.


/s/ William W. Dolan                         /s/ Stephen A. Michael, President
-------------------------------              ----------------------------------
William W. Dolan, Secretary                  Stephen A. Michael, President