Document:

EXHIBIT 4.25

                                    AGREEMENT

         This Agreement (the "Agreement"), dated as of October 2, 2003, is
entered into by and between Amnis Systems Inc., a Delaware corporation with
headquarters located at 3450 Hillview Avenue, Palo Alto, California 94304 (the
"Company"), Bristol Investment Fund, Ltd. ("Bristol") and Alpha Capital
Aktiengesellschaft ("Alpha"). Bristol and Alpha are collectively referred to as
the "Investors".

         WHEREAS, Bristol acquired the right to collect $531,397.29 (the
"Obligation") from Optivision, Inc., a California corporation ("Optivision") and
wholly-owned subsidiary of the Company, as well as a senior security interest in
the assets of Optivision and the Company to secure payment of the Obligation
(the "Senior Security Interest"), pursuant to the Assignment Agreement dated as
of May 2, 2003 by and between Bristol and Pacific Business Funding, a division
of Cupertino National Bank, a California Banking Corporation and successor in
interest to Pacific Business Funding Corporation ("PBF");

         WHEREAS, Alpha acquired from Bristol the right to collect 71.43% of the
Obligation (equal to $379,577.08) and related Senior Security Interest pursuant
to the Purchase Agreement dated May 8, 2003 by and between Alpha and Bristol,
resulting in Bristol retaining the right to collect 28.57%, or $151,820.21 of
the Obligation and related Senior Security Interest;

         WHEREAS, the Company wishes to pay the Investors, and the Investors
wish to be paid, the amount of the Obligation due to the Investors in shares of
common stock of the Company at a price per share equal to the lesser of $0.05
and sixty-five percent (65%) of the average of the lowest three intraday trading
prices during the thirty trading day preceding payment (the "Conversion Price");

         NOW THEREFORE, in consideration of the foregoing, and other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

         1. PAYMENT OF OBLIGATION IN SHARES OF COMMON STOCK OF COMPANY AT
CONVERSION PRICE. As payment of the amount of the Obligation to the Investors,
the Company shall issue to the Investors shares of its common stock (the
"Payment Shares") at a price per share equal to the Conversion Price. At any
time following the date of this Agreement, each Investor may submit a notice of
conversion, the form of which is attached hereto (the "Notice of Conversion"),
to the Company via facsimile transmission indicating the amount of the
Obligation that the Investor wishes to convert into shares of common stock of
the Company. Each Investor may elect to convert any portion of the total amount
of the Obligation owed to the Investor (i.e., the total amount owed to Bristol
is $151,820.21 and the total amount owed to Alpha is $379,577.08); provided,
however, that each Investor may not convert into such number of shares which
would result in beneficial ownership by the Investor of more than 9.99% of the
outstanding shares of common stock of the Company on the date of conversion (the
"Conversion Limitation"). For the purposes of the Conversion Limitation,
beneficial ownership shall be determined in accordance with Section 13(d) of the
Securities Exchange Act of 1934, as amended, and Regulation 13d-3 thereunder.
The Investor may waive the Conversion Limitation with 61 days prior notice to
the Company. The Investor shall have the right to determine which of the equity
of the Company deemed beneficially owned by the Investor shall be included in
the calculation of 9.99% limitation described above and which shall be allocated
to the excess above 9.99%.

         2. TIMELY ISSUANCE OF SHARES OF COMMON STOCK TO INVESTORS. Within three
business days following receipt of the Notice of Conversion (such third business
day referred to herein as the "Delivery Deadline"), the Company shall deliver to

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the Investor such number of Payment Shares equal to the amount requested to be
converted by the Investor divided by the Conversion Price then in effect. If the
Company's transfer agent is able to deliver the Payment Shares in electronic
format via DWAC transfer, the Payment Shares must arrive in the Investor's
account by the Delivery Deadline. If the Company fails to deliver Payment Shares
on or before the Delivery Deadline, the Company shall pay the Investor in cash,
for each day beyond the Delivery Date that the Payment Shares are not delivered,
an amount equal to five percent (5%) of the amount of the Obligation that the
Investor has requested to convert.

         3. REGISTRATION OF PAYMENT SHARES. The Company shall include no less
than two hundred percent (200%) of the number of Payment Shares issuable to the
Investors upon payment of the Obligation in full at the Conversion Price in
effect as of the date of this Agreement in the Form SB-2 registration statement
that the Company plans to file on October __, 2003 (the "Registration
Statement").

         4. FURTHER ASSURANCES. The Company and Investors agree to execute,
acknowledge and deliver all such further certificates, instruments and other
documents, and to take all such further action as may be necessary or
appropriate to effectuate the terms of this Agreement.

         5. NOTICE. Any notice or other communication under this Agreement shall
be in writing and shall be considered given when received and shall be delivered
by fax to the parties at:

         To the Company:

         Amnis Systems Inc.
         3450 Hillview Avenue
         Palo Alto, CA 93404
         Attention:  Lawrence Bartlett
         Fax: (650) 855-0222

         To Bristol:

         Bristol Investment Fund, Ltd.
         c/o Bristol Capital Advisors, LLC
         6363 Sunset Boulevard, Fifth Floor
         Attention:  Amy Wang, Esq.
         Fax: (323) 468-8307

         To Alpha:

         Alpha Capital Aktiengesellschaft
         c/o LH Financial
         160 Central Park South, Suite 2701
         New York, NY 10021
         Attention:  Arie Rabinowitz
         Fax: (212) 586-8244

         6. AMENDMENTS IN WRITING. This Agreement cannot be changed, modified,
amended or terminated orally and any such change, modification, amendment or
termination shall be in writing and signed by the parties hereto. All prior
agreements, understandings, representations, warranties, and negotiations, if
any, are merged into this Agreement, and incorporated herein by reference.

         7. GOVERNING LAW. This Agreement shall be governed by and construed in
accordance with the laws of the State of New York, without giving effect to any
choice of law provisions thereof.

<PAGE>

         8. JURISDICTION; ATTORNEYS' FEES; WAIVER OF JURY TRIAL. Each party
hereby irrevocably and unconditionally consents to the jurisdiction of the
courts located in the State of New York in any action to enforce, interpret or
construe any provision of this Agreement, and also hereby irrevocably waives any
defense or improper venue or forum non conveniens to any such action brought in
those courts. Each party hereto consents to service of process by certified mail
at its address listed above. The party which does not prevail in any dispute
arising under this Agreement shall be responsible for all fees and expenses,
including attorneys' fees, incurred by the prevailing party in connection with
such dispute. Both parties agree that they knowingly relinquish and waive any
right to a trial by jury in any such action.

         9. COUNTERPARTS. Each party may sign identical counterparts of this
Agreement with the same effect as if the parties signed the same document. A
copy of this Agreement signed by a party and delivered by facsimile transmission
to the other party shall have the same effect as the delivery of an original of
this Agreement containing the original signature of such party.

         10. COUNSEL. Each party to this Agreement represents and warrants that
it has received the advice and counsel of an attorney in connection with the
negotiation, preparation and execution of this Agreement.

         11. ENTIRE AGREEMENT. This Agreement contains the entire agreement
between the parties and supersedes any and all prior and/or contemporaneous oral
or written negotiations, agreements, representations, and understandings between
the parties (including without limitation the April 2003 letter of intent
executed by the parties). The parties understand that this Agreement is made
without reliance upon any inducement, statement, promise or representation other
than those contained specifically within this Agreement.

         12. AUTHORIZATION; ENFORCEMENT. Each party represents that it has the
requisite corporate power and authority to enter into and perform this
Agreement. This Agreement has been duly executed and delivered by the authorized
representative of each party.

                           [SIGNATURE PAGE TO FOLLOW]

                               [REMAINDER OF PAGE
                            INTENTIONALLY LEFT BLANK]

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         IN WITNESS WHEREOF, the Company and the Investors have each caused this
Agreement to be executed on its behalf as of the date set forth above.

THE COMPANY:                           THE INVESTORS:

AMNIS SYSTEMS INC.                     BRISTOL INVESTMENT FUND, LTD.

----------------------------------     -----------------------------------
Name:                                  Name:    Paul Kessler
Title:                                 Title:   Director

                                       ALPHA CAPITAL Aktiengesellschaft

                                       ------------------------------------
                                       Name:
                                       Title:

<PAGE>

                              NOTICE OF CONVERSION

                  The undersigned hereby irrevocably elects to convert
$________principal amount of the Obligation (defined in the Agreement dated
October 1, 2003 between Amnis Systems Inc. and the undersigned) into shares of
common stock, par value $.0001 per share ("COMMON STOCK"), of Amnis Systems
Inc., a Delaware corporation (the "BORROWER") according to the conditions of the
Agreement, as of the date written below. If securities are to be issued in the
name of a person other than the undersigned, the undersigned will pay all
transfer taxes payable with respect thereto and is delivering herewith such
certificates.

                  The Borrower shall electronically transmit the Common Stock
issuable pursuant to this Notice of Conversion to the account of the undersigned
or its nominee with DTC through its Deposit Withdrawal Agent Commission system
("DWAC TRANSFER").

              Name of DTC Prime Broker:
              Account Number:

                  In lieu of receiving shares of Common Stock issuable pursuant
to this Notice of Conversion by way of a DWAC Transfer, the undersigned hereby
requests that the Borrower issue a certificate or certificates for the number of
shares of Common Stock set forth below (which numbers are based on the
calculation by the undersigned) in the name(s) specified immediately below or,
if additional space is necessary, on an attachment hereto:

              Name:
              Address:

                  The undersigned represents and warrants that all offers and
sales by the undersigned of the securities issuable to the undersigned upon
conversion of the Obligation shall be made pursuant to registration of the
securities under the Securities Act of 1933, as amended (the "ACT"), or pursuant
to an exemption from registration under the Act.

                  Date of Conversion:___________________________
                  Applicable Conversion Price:____________________
                  Number of Shares of Common Stock to be Issued Pursuant to
                  Conversion of the Obligation:______________
                  Signature:___________________________________
                  Name:______________________________________
                  Address:____________________________________

                  The Borrower shall issue and deliver shares of Common Stock to
the undersigned not later than three business days following receipt of this
Notice of Conversion, and shall make payments pursuant to the

                                            [NAME OF INVESTOR]

                                            -------------------------------
                                            Name:
                                            Title:<PAGE>
                                                                   Exhibit 10.57

                           Memorandum of Understanding

         This  Memorandum of  Understanding  is between  HiEnergy  Technologies,
Inc., 1601 Alton Parkway,  Irvine CA 92612 (HiEnergy") and Aeropuertos Espanoles
y Navegacion Aerea, Edificio La Piovera - Peonias, 2 28042 Madrid ("Aena").

         1.       HiEnergy  intends to test its system in Spain and Aena intends
                  to establish a collaboration with HiEnergy for the development
                  of the technology for the security of Spain.

         2.       Aena Agrees to:

                  a.       Allow the use of its premises

                  b.       Appoint one contact person

                  c.       Provide technical performance specifications required
                           for the test

                  d.       Obtain  the  assistance  of  Spanish  State  Security
                           forces.

                  e.       Evaluate the system performance

                  f.       Upon successful CarBomb Finder test, to make its best
                           effort to arrange an opportunity for HiEnergy to test
                           its detector as a False Alarm Eliminator for luggage.

3.                HiEnergy agrees:

                  a.       To make its system available for the test

                  b.       To provide appropriate scientific/technical personnel
                           to operate the test

                  c.       To bear all expenses associated with the test

4.       Duration The approximate  starting date of the test will be December 1,
         2003
         Phase I: Two Weeks
         Phase II: Two Weeks

5.       Indemnification

         HiEnergy  will be  responsible  for  claims  for  damages  arising as a
         consequence  of the tests,  that are  brought by any third  party,  and
         indemnify Aena as to any claims,  accusations,  and demands for damages
         which  Aena  receives  derived  from  its  activities  at  the  Spanish
         airports.

         Agreed to this 6th day of October, 2003.

         HiEnergy Technologies, Inc. by                 Aena, by

         /s/ Bogdan C. Maglich                          /s/ Jose Romero
         ----------------------                         ------------------------
         Bogdan C. Maglich                              Jose Romero
         Chairman and CEO                               Aeropuertos Espanoles
                                                        Central Security Office
                                                        Security Manager

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