THIS WARRANT AND THE COMMON SHARES ISSUABLE UPON EXERCISE OF THIS WARRANT
HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED.
THIS WARRANT AND THE COMMON SHARES ISSUABLE UPON EXERCISE OF THIS WARRANT
MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE
OF AN EFFECTIVE REGISTRATION STATEMENT AS TO THIS WARRANT UNDER SAID ACT
OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO SCIENCE DYNAMICS
CORPORATION THAT SUCH REGISTRATION IS NOT REQUIRED.

     Right to Purchase 50,000 Shares of Common
     Stock of Science Dynamics Corporation
     (subject to adjustment as provided herein)

                      COMMON STOCK PURCHASE WARRANT

No. 2002-4                                   Issue Date:  July __, 2002

SCIENCE DYNAMICS CORPORATION, a corporation organized under the laws
of the State of Delaware (the "Company"), hereby certifies that, for
value received, LAURUS MASTER FUND LTD., or assigns, is entitled, subject
to the terms set forth below, to purchase from the Company from and after
the Issue Date of this Warrant and at any time or from time to time
before 5:00 p.m., New York time, through five (5) years after such date
(the "Expiration Date"), up to 50,000 fully paid and nonassessable shares
of Common Stock (as hereinafter defined), $.01 par value per share, of
the Company, at a purchase price of $_____ per share (such purchase price
per share as adjusted from time to time as herein provided is referred to
herein as the "Purchase Price"). The number and character of such shares
of Common Stock and the Purchase Price are subject to adjustment as
provided herein.

As used herein the following terms, unless the context otherwise
requires, have the following respective meanings:

(a) The term "Company" shall include Science Dynamics Corporation
and any corporation which shall succeed or assume the obligations of
Science Dynamics Corporation hereunder.

(b) The term "Common Stock" includes (a) the Company's Common Stock,
$.01 par value per share, as authorized on the date of the Subscription
Agreement referred to in Section 9 hereof, (b) any other capital stock of
any class or classes (however designated) of the Company, authorized on
or after such date, the holders of which shall have the right, without
limitation as to amount, either to all or to a share of the balance of
current dividends and liquidating dividends after the payment of
dividends and distributions on any shares entitled to preference, and the
holders of which shall ordinarily, in the absence of contingencies, be
entitled to vote for the election of a majority of directors of the
Company (even if the right so to vote has been suspended by the happening
of such a contingency) and (c) any other securities into which or for
which any of the securities described in (a) or (b) may be converted or
exchanged pursuant to a plan of recapitalization, reorganization, merger,
sale of assets or otherwise.

(c) The term "Other Securities" refers to any stock (other than
Common Stock) and other securities of the Company or any other person
(corporate or otherwise) which the holder of the Warrant at any time
shall be entitled to receive, or shall have received, on the exercise of
the Warrant, in lieu of or in addition to Common Stock, or which at any
time shall be issuable or shall have been issued in exchange for or in
replacement of Common Stock or Other Securities pursuant to Section 4 or
otherwise.

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<PAGE>

1. Exercise of Warrant.

1.1. Number of Shares Issuable upon Exercise.  From and after
the date hereof through and including the Expiration Date, the holder
hereof shall be entitled to receive, upon exercise of this Warrant in
whole in accordance with the terms of subsection 1.2 or upon exercise of
this Warrant in part in accordance with subsection 1.3, shares of Common
Stock of the Company, subject to adjustment pursuant to Section 4.

1.2. Full Exercise.  This Warrant may be exercised in full by
the holder hereof by delivery of an original or fax copy of the form of
subscription attached as Exhibit A hereto (the "Subscription Form") duly
executed by such holder and surrender of the original Warrant within
seven days of exercise, to the Company at its principal office or at the
office of its Warrant agent (as provided hereinafter), accompanied by
payment, in cash, wire transfer, or by certified or official bank check
payable to the order of the Company, in the amount obtained by
multiplying the number of shares of Common Stock for which this Warrant
is then exercisable by the Purchase Price (as hereinafter defined) then
in effect.

1.3. Partial Exercise.  This Warrant may be exercised in part
(but not for a fractional share) by surrender of this Warrant in the
manner and at the place provided in subsection 1.2 except that the amount
payable by the holder on such partial exercise shall be the amount
obtained by multiplying (a) the number of shares of Common Stock
designated by the holder in the Subscription Form by (b) the Purchase
Price then in effect.  On any such partial exercise, the Company, at its
expense, will forthwith issue and deliver to or upon the order of the
holder hereof a new Warrant of like tenor, in the name of the holder
hereof or as such holder (upon payment by such holder of any applicable
transfer taxes) may request, the number of shares of Common Stock for
which such Warrant may still be exercised.

1.4. Fair Market Value. Fair Market Value of a share of Common
Stock as of a particular date (the "Determination Date") shall mean the
Fair Market Value of a share of the Company's Common Stock. Fair Market
Value of a share of Common Stock as of a Determination Date shall mean:

(a) If the Company's Common Stock is traded on an
exchange or is quoted on the National Association of Securities Dealers,
Inc. Automated Quotation ("NASDAQ") National Market System or the NASDAQ
SmallCap Market, then the closing or last sale price, respectively,
reported for the last business day immediately preceding the
Determination Date.

(b) If the Company's Common Stock is not traded on an
exchange or on the NASDAQ National Market System or the NASDAQ SmallCap
Market but is traded in the over-the-counter market, then the mean of the
closing bid and asked prices reported for the last business day
immediately preceding the Determination Date.

(c) Except as provided in clause (d) below, if the
Company's Common Stock is not publicly traded, then as the Holder and the
Company agree or in the absence of agreement by arbitration in accordance
with the rules then standing of the American Arbitration Association,
before a single arbitrator to be chosen from a panel of persons qualified
by education and training to pass on the matter to be decided.

(d) If the Determination Date is the date of a
liquidation, dissolution or winding up, or any event deemed to be a
liquidation, dissolution or winding up pursuant to the Company's charter,
then all amounts to be payable per share to holders of the Common Stock
pursuant to the charter in the event of such liquidation, dissolution or
winding up, plus all other amounts to be payable per share in respect of
the Common Stock in liquidation under the charter, assuming for the
purposes of this clause (d) that all of the shares of Common Stock then
issuable upon exercise of all of the Warrants are outstanding at the
Determination Date.

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<PAGE>

1.5. Company Acknowledgment. The Company will, at the time of
the exercise of the Warrant, upon the request of the holder hereof
acknowledge in writing its continuing obligation to afford to such holder
any rights to which such holder shall continue to be entitled after such
exercise in accordance with the provisions of this Warrant. If the holder
shall fail to make any such request, such failure shall not affect the
continuing obligation of the Company to afford to such holder any such
rights.

1.6. Trustee for Warrant Holders. In the event that a bank or
trust company shall have been appointed as trustee for the holders of the
Warrants pursuant to Subsection 3.2, such bank or trust company shall
have all the powers and duties of a warrant agent (as hereinafter
described) and shall accept, in its own name for the account of the
Company or such successor person as may be entitled thereto, all amounts
otherwise payable to the Company or such successor, as the case may be,
on exercise of this Warrant pursuant to this Section 1.

2.1 Delivery of Stock Certificates, etc. on Exercise. The Company
agrees that the shares of Common Stock purchased upon exercise of this
Warrant shall be deemed to be issued to the holder hereof as the record
owner of such shares as of the close of business on the date on which
this Warrant shall have been surrendered and payment made for such shares
as aforesaid. As soon as practicable after the exercise of this Warrant
in full or in part, and in any event within 7 days thereafter, the
Company at its expense (including the payment by it of any applicable
issue taxes) will cause to be issued in the name of and delivered to the
holder hereof, or as such holder (upon payment by such holder of any
applicable transfer taxes) may direct in compliance with applicable
Securities Laws, a certificate or certificates for the number of duly and
validly issued, fully paid and nonassessable shares of Common Stock (or
Other Securities) to which such holder shall be entitled on such
exercise, plus, in lieu of any fractional share to which such holder
would otherwise be entitled, cash equal to such fraction multiplied by
the then Fair Market Value of one full share, together with any other
stock or other securities and property (including cash, where applicable)
to which such holder is entitled upon such exercise pursuant to Section 1
or otherwise.

 2.2. Cashless Exercise.

 (a) Payment may be made either in (i) cash or by certified or
official bank check payable to the order of the Company equal to the
applicable aggregate Purchase Price, (ii) by delivery of Warrants, Common
Stock and/or Common Stock receivable upon exercise of the Warrants in
accordance with Section (b) below, or (iii) by a combination of any of
the foregoing methods, for the number of Common Shares specified in such
form (as such exercise number shall be adjusted to reflect any adjustment
in the total number of shares of Common Stock issuable to the holder per
the terms of this Warrant) and the holder shall thereupon be entitled to
receive the number of duly authorized, validly issued, fully-paid and
non-assessable shares of Common Stock (or Other Securities) determined as
provided herein.

 (b) Notwithstanding any provisions herein to the contrary, if the
Fair Market Value of one share of Common Stock is greater than the
Purchase Price (at the date of calculation as set forth below), in lieu
of exercising this Warrant for cash, upon consent of the Company, the
holder may elect to receive shares equal to the value (as determined
below) of this Warrant (or the portion thereof being cancelled) by
surrender of this Warrant at the principal office of the Company together
with the properly endorsed Subscription Form in which event the Company
shall issue to the holder a number of shares of Common Stock computed
using the following formula:

  X=Y (A-B)
       ---
    A
  --------

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<PAGE>

Where X= the number of shares of Common Stock to be issued to the
         holder

  Y= the number of shares of Common Stock purchasable under the
     Warrant or, if only a portion of the Warrant is
     being exercised, the portion of the Warrant being
     exercised (at the date of such calculation)

  A= the Fair Market Value of one share of the Company's Common
     Stock (at the date of such calculation)

  B= Purchase Price (as adjusted to the date of such calculation)

3. Adjustment for Reorganization, Consolidation, Merger, etc.

3.1. Reorganization, Consolidation, Merger, etc. In case at
any time or from time to time, the Company shall (a) effect a
reorganization, (b) consolidate with or merge into any other person, or
(c) transfer all or substantially all of its properties or assets to any
other person under any plan or arrangement contemplating the dissolution
of the Company, then, in each such case, as a condition to the
consummation of such a transaction, proper and adequate provision shall
be made by the Company whereby the holder of this Warrant, on the
exercise hereof as provided in Section 1 at any time after the
consummation of such reorganization, consolidation or merger or the
effective date of such dissolution, as the case may be, shall receive, in
lieu of the Common Stock (or Other Securities) issuable on such exercise
prior to such consummation or such effective date, the stock and other
securities and property (including cash) to which such holder would have
been entitled upon such consummation or in connection with such
dissolution, as the case may be, if such holder had so exercised this
Warrant, immediately prior thereto, all subject to further adjustment
thereafter as provided in Section 4.

3.2. Dissolution. In the event of any dissolution of the
Company following the transfer of all or substantially all of its
properties or assets, the Company, prior to such dissolution, shall at
its expense deliver or cause to be delivered the stock and other
securities and property (including cash, where applicable) receivable by
the holders of the Warrants after the effective date of such dissolution
pursuant to this Section 3 to a bank or trust company having its
principal office in New York, NY, as trustee for the holder or holders of
the Warrants.

3.3. Continuation of Terms. Upon any reorganization,
consolidation, merger or transfer (and any dissolution following any
transfer) referred to in this Section 3, this Warrant shall continue in
full force and effect and the terms hereof shall be applicable to the
shares of stock and other securities and property receivable on the
exercise of this Warrant after the consummation of such reorganization,
consolidation or merger or the effective date of dissolution following
any such transfer, as the case may be, and shall be binding upon the
issuer of any such stock or other securities, including, in the case of
any such transfer, the person acquiring all or substantially all of the
properties or assets of the Company, whether or not such person shall
have expressly assumed the terms of this Warrant as provided in Section
4.  In the event this Warrant does not continue in full force and effect
after the consummation of the transaction described in this Section 3,
then only in such event will the Company's securities and property
(including cash, where applicable) receivable by the holders of the
Warrants be delivered to the Trustee as contemplated by Section 3.2.

-4-
<PAGE>

3.4. Share Issuance.   Except for the Excepted Issuances as
described in Section 11 of the Subscription Agreement, if the Company at
any time shall issue any shares of Common Stock prior to the complete
exercise of this Warrant for a consideration less than the Purchase Price
that would be in effect at the time of such issue, then, and thereafter
successively upon each such issue, the Purchase Price shall be reduced as
follows: (i) the number of shares of Common Stock outstanding immediately
prior to such issue shall be multiplied by the Purchase Price in effect
at the time of such issue and the product shall be added to the aggregate
consideration, if any, received by the Company upon such issue of
additional shares of Common Stock; and (ii) the sum so obtained shall be
divided by the number of shares of Common Stock outstanding immediately
after such issue.  The resulting quotient shall be the adjusted Purchase
Price.  For purposes of this adjustment, the issuance of any security of
the Company carrying the right to convert such security into shares of
Common Stock or of any warrant, right or option to purchase Common Stock
shall result in an adjustment to the Purchase Price upon the issuance of
shares of Common Stock upon exercise of such conversion or purchase
rights.

4. Extraordinary Events Regarding Common Stock. In the event that
the Company shall (a) issue additional shares of the Common Stock as a
dividend or other distribution on outstanding Common Stock, (b) subdivide
its outstanding shares of Common Stock, or (c) combine its outstanding
shares of the Common Stock into a smaller number of shares of the Common
Stock, then, in each such event, the Purchase Price shall, simultaneously
with the happening of such event, be adjusted by multiplying the then
Purchase Price by a fraction, the numerator of which shall be the number
of shares of Common Stock outstanding immediately prior to such event and
the denominator of which shall be the number of shares of Common Stock
outstanding immediately after such event, and the product so obtained
shall thereafter be the Purchase Price then in effect. The Purchase
Price, as so adjusted, shall be readjusted in the same manner upon the
happening of any successive event or events described herein in this
Section 4. The number of shares of Common Stock that the holder of this
Warrant shall thereafter, on the exercise hereof as provided in Section
1, be entitled to receive shall be increased to a number determined by
multiplying the number of shares of Common Stock that would otherwise
(but for the provisions of this Section 4) be issuable on such exercise
by a fraction of which (a) the numerator is the Purchase Price that would
otherwise (but for the provisions of this Section 4) be in effect, and
(b) the denominator is the Purchase Price in effect on the date of such
exercise.

5. Certificate as to Adjustments. In each case of any adjustment or
readjustment in the shares of Common Stock (or Other Securities) issuable
on the exercise of the Warrants, the Company at its expense will promptly
cause its Chief Financial Officer or other appropriate designee to
compute such adjustment or readjustment in accordance with the terms of
the Warrant and prepare a certificate setting forth such adjustment or
readjustment and showing in detail the facts upon which such adjustment
or readjustment is based, including a statement of (a) the consideration
received or receivable by the Company for any additional shares of Common
Stock (or Other Securities) issued or sold or deemed to have been issued
or sold, (b) the number of shares of Common Stock (or Other Securities)
outstanding or deemed to be outstanding, and (c) the Purchase Price and
the number of shares of Common Stock to be received upon exercise of this
Warrant, in effect immediately prior to such adjustment or readjustment
and as adjusted or readjusted as provided in this Warrant. The Company
will forthwith mail a copy of each such certificate to the holder of the
Warrant and any Warrant agent of the Company (appointed pursuant to
Section 11 hereof).

6. Reservation of Stock, etc. Issuable on Exercise of Warrant;
Financial Statements. The Company will at all times reserve and keep
available, solely for issuance and delivery on the exercise of the
Warrants, all shares of Common Stock (or Other Securities) from time to
time issuable on the exercise of the Warrant.  This Warrant entitles the
holder hereof to receive copies of all financial and other information
distributed or required to be distributed to the holders of the Company's
Common Stock.

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<PAGE>

7. Assignment; Exchange of Warrant. Subject to compliance with
applicable Securities laws, this Warrant, and the rights evidenced
hereby, may be transferred by any registered holder hereof (a
"Transferor") with respect to any or all of the Shares. On the surrender
for exchange of this Warrant, with the Transferor's endorsement in the
form of Exhibit B attached hereto (the Transferor Endorsement Form") and
together with evidence reasonably satisfactory to the Company
demonstrating compliance with applicable Securities Laws, the Company at
its expense but with payment by the Transferor of any applicable transfer
taxes) will issue and deliver to or on the order of the Transferor
thereof a new Warrant or Warrants of like tenor, in the name of the
Transferor and/or the transferee(s) specified in such Transferor
Endorsement Form (each a "Transferee"), calling in the aggregate on the
face or faces thereof for the number of shares of Common Stock called for
on the face or faces of the Warrant so surrendered by the Transferor.

8. Replacement of Warrant. On receipt of evidence reasonably
satisfactory to the Company of the loss, theft, destruction or mutilation
of this Warrant and, in the case of any such loss, theft or destruction
of this Warrant, on delivery of an indemnity agreement or security
reasonably satisfactory in form and amount to the Company or, in the case
of any such mutilation, on surrender and cancellation of this Warrant,
the Company at its expense will execute and deliver, in lieu thereof, a
new Warrant of like tenor.

9. Subscription Agreement.  This Warrant is issued pursuant to a
Subscription Agreement entered into by the Company and Subscribers of the
Company's 8% Convertible Notes at or prior to the issue date of this
Warrant.  The terms of the Subscription Agreement are incorporated herein
by this reference.

 10. Maximum Exercise.   The Holder shall not be entitled to exercise
this Warrant on an exercise date, in connection with that number of
shares of Common Stock which would be in excess of the sum of (i) the
number of shares of Common Stock beneficially owned by the Holder and its
affiliates on an exercise date, and (ii) the number of shares of Common
Stock issuable upon the exercise of this Warrant with respect to which
the determination of this proviso is being made on an exercise date,
which would result in beneficial ownership by the Holder and its
affiliates of more than 4.99% of the outstanding shares of Common Stock
of the Company on such date.  For the purposes of the proviso to the
immediately preceding sentence, 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.  Subject to the foregoing,
the Holder shall not be limited to aggregate exercises which would result
in the issuance of more than 4.99%.  The restriction described in this
paragraph may be revoked upon 75 days prior notice from the Holder to the
Company or upon an Event of Default under the Note.  The Holder may
allocate which of the equity of the Company deemed beneficially owned by
the Subscriber shall be included in the 4.99% amount described above and
which shall be allocated to the excess above 4.99%.

11. Warrant Agent.  The Company may, by written notice to the each
holder of the Warrant, appoint an agent for the purpose of issuing Common
Stock (or Other Securities) on the exercise of this Warrant pursuant to
Section 1, exchanging this Warrant pursuant to Section 7, and replacing
this Warrant pursuant to Section 8, or any of the foregoing, and
thereafter any such issuance, exchange or replacement, as the case may
be, shall be made at such office by such agent.

12. Transfer on the Company's Books.  Until this Warrant is
transferred on the books of the Company, the Company may treat the
registered holder hereof as the absolute owner hereof for all purposes,
notwithstanding any notice to the contrary.

13. Notices, etc.  All notices and other communications from the
Company to the holder of this Warrant shall be mailed by first class
registered or certified mail, postage prepaid, at such address as may
have been furnished to the Company in writing by such holder or, until
any such holder furnishes to the Company an address, then to, and at the
address of, the last holder of this Warrant who has so furnished an
address to the Company.

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<PAGE>

14. Miscellaneous. This Warrant and any term hereof may be changed,
waived, discharged or terminated only by an instrument in writing signed
by the party against which enforcement of such change, waiver, discharge
or termination is sought. This Warrant shall be construed and enforced in
accordance with and governed by the laws of New York.  Any dispute
relating to this Warrant shall be adjudicated in New York State.  The
headings in this Warrant are for purposes of reference only, and shall
not limit or otherwise affect any of the terms hereof.  The invalidity or
unenforceability of any provision hereof shall in no way affect the
validity or enforceability of any other provision.



                  [THIS SPACE INTENTIONALLY LEFT BLANK]

-7-
<PAGE>



IN WITNESS WHEREOF, the Company has executed this Warrant under seal
as of the date first written above.

SCIENCE DYNAMICS CORPORATION



By:_____________________________________




Witness:


______________________________



-8-
<PAGE>


                                                            Exhibit A
                            FORM OF SUBSCRIPTION
                (To be signed only on exercise of Warrant)

TO: Science Dynamics Corporation

The undersigned, pursuant to the provisions set forth in the attached
Warrant (No.____), hereby irrevocably elects to purchase (check
applicable box):

___ ________ shares of the Common Stock covered by such Warrant; or

___ the maximum number of shares of Common Stock covered by such Warrant
pursuant to the cashless exercise procedure set forth in Section 2.

The undersigned herewith makes payment of the full purchase price for
such shares at the price per share provided for in such Warrant, which is
$___________.  Such payment takes the form of (check applicable box or
boxes):

___ $__________ in lawful money of the United States; and/or

___ the cancellation of such portion of the attached Warrant as is
exercisable for a total of _______ shares of Common Stock (using a Fair
Market Value of $_______ per share for purposes of this calculation);
and/or

___ the cancellation of such number of shares of Common Stock as is
necessary, in accordance with the formula set forth in Section 2, to
exercise this Warrant with respect to the maximum number of shares of
Common Stock purchaseable pursuant to the cashless exercise procedure set
forth in Section 2.

The undersigned requests that the certificates for such shares be issued
in the name of, and delivered to  ____________________       whose
address is _____________________________________________________________.

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

Dated:___________________   _______________________________________
                            (Signature must conform to name of holder
                             as specified on the face of the Warrant)
                            _____________________________________
                            (Address)



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<PAGE>

                                                         Exhibit B

                        FORM OF TRANSFEROR ENDORSEMENT
                  (To be signed only on transfer of Warrant)

For value received, the undersigned hereby sells, assigns, and
transfers unto the person(s) named below under the heading "Transferees"
the right represented by the within Warrant to purchase the percentage
and number of shares of Common Stock of Science Dynamics Corporation to
which the within Warrant relates specified under the headings "Percentage
Transferred" and "Number Transferred," respectively, opposite the name(s)
of such person(s) and appoints each such person Attorney to transfer its
respective right on the books of Science Dynamics Corporation with full
power of substitution in the premises.


------------------------------------------------------------------------
Transferees       Percentage                       Number
                  Transferred                      Transferred
------------------------------------------------------------------------

------------------------------------------------------------------------

------------------------------------------------------------------------

------------------------------------------------------------------------





Dated:                  , __ ___   ______________________________________
                                   (Signature must conform to name of
                                    holder as specified on the face of the
                                    warrant)


Signed in the presence of:


_____________________________      _______________________________________
        (Name)                                  (address)

                                   _______________________________________

                                                (address)

ACCEPTED AND AGREED:
[TRANSFEREE]


_________________________________
    (Name)


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