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


                          SECURED CONVERTIBLE TERM NOTE

          FOR  VALUE  RECEIVED,   SCIENCE  DYNAMICS   CORPORATION,   a  Delaware
corporation  (the  "Borrower"),  hereby  promises to pay to LAURUS  MASTER FUND,
LTD., c/o M&C Corporate  Services Limited,  P.O. Box 309 GT, Ugland House, South
Church Street, George Town, Grand Cayman, Cayman Islands, Fax: 345-949-8080 (the
"Holder") or its registered assigns or successors in interest, on order, the sum
of Two  Million  Dollars  ($2,000,000),  together  with any  accrued  and unpaid
interest hereon, on February 11, 2008 (the "Maturity Date") if not sooner paid.

          Capitalized  terms  used  herein  without  definition  shall  have the
meanings ascribed to such terms in that certain  Securities  Purchase  Agreement
dated as of the date hereof  between the  Borrower  and the Holder (as  amended,
modified or supplemented from time to time, the "Purchase Agreement").

The following terms shall apply to this Note:

                                    ARTICLE I
                             INTEREST & AMORTIZATION

          1.1(a)  Interest  Rate.  Subject  to  Sections  4.11  and 5.6  hereof,
interest  payable on this Note shall  accrue at a rate per annum (the  "Interest
Rate") equal to the "prime rate"  published in The Wall Street Journal from time
to time, plus three percent (3%). The prime rate shall be increased or decreased
as the case may be for each  increase or decrease in the prime rate in an amount
equal to such  increase  or  decrease  in the  prime  rate;  each  change  to be
effective  as of the day of the change in such rate.  Subject to Section  1.1(b)
hereof, the Interest Rate shall not be less than eight percent (8.0%).  Interest
shall be (i)  calculated  on the  basis  of a 360 day  year,  and  (ii)  payable
monthly,  in arrears,  commencing on March 1, 2005 and on the first business day
of each  consecutive  calendar month  thereafter until the Maturity Date (and on
the Maturity Date),  whether by  acceleration  or otherwise  (each, a "Repayment
Date").

          1.1  (b)  Interest  Rate  Adjustment.   The  Interest  Rate  shall  be
calculated on the last business day of each month  hereafter  until the Maturity
Date (each a  "Determination  Date") and shall be subject to  adjustment  as set
forth  herein.  If (i) the  Borrower  shall  have  registered  the shares of the
Borrower's  common stock  underlying each of the conversion of the Note and that
certain warrant issued to Holder on a registration  statement declared effective
by the Securities and Exchange Commission (the "SEC"), and (ii) the market price
(the "Market  Price") of the Common Stock as reported by Bloomberg,  L.P. on the
Principal  Market (as defined  below) for the five (5) trading days  immediately
preceding a  Determination  Date exceeds the then  applicable  Fixed  Conversion

                                       1

Price  by at  least  twenty  five  percent  (25%),  the  Interest  Rate  for the
succeeding  calendar  month shall  automatically  be reduced by 200 basis points
(200 b.p.) (2.0.%) for each  incremental  twenty five percent (25%)  increase in
the Market Price of the Common Stock above the then applicable  Fixed Conversion
Price.  Notwithstanding the foregoing (and anything to the contrary contained in
herein), in no event shall the Interest Rate be less than zero percent (0%).

          1.2 Minimum Monthly  Principal  Payments.  Amortizing  payments of the
aggregate  principal  amount  outstanding  under  this  Note  at any  time  (the
"Principal  Amount")  shall  begin on June 1, 2005 and shall  recur on the first
business day of each succeeding  month thereafter until the Maturity Date (each,
an  "Amortization  Date").  Subject to Article 3 below,  beginning  on the first
Amortization  Date,  the Borrower  shall make monthly  payments to the Holder on
each Repayment Date, each in the amount of $60,606.06, together with any accrued
and unpaid interest to date on such portion of the Principal Amount plus any and
all other amounts which are then owing under this Note,  the Purchase  Agreement
or any  other  Related  Agreement  but  have not been  paid  (collectively,  the
"Monthly Amount"). Any Principal Amount that remains outstanding on the Maturity
Date shall be due and payable on the Maturity Date.

                                   ARTICLE II
                              CONVERSION REPAYMENT

          2.1 (a)  Payment of  Monthly  Amount in Cash or Common  Stock.  If the
Monthly  Amount (or a portion  thereof of such Monthly Amount if such portion of
the Monthly Amount would have been converted into shares of Common Stock but for
Section 3.2) is required to be paid in cash pursuant to Section 2.1(b), then the
Borrower  shall pay the Holder an amount equal to 102% of the Monthly Amount due
and owing to the Holder on the Repayment Date in cash. If the Monthly Amount (or
a  portion  of such  Monthly  Amount  if not all of the  Monthly  Amount  may be
converted into shares of Common Stock pursuant to Section 3.2) is required to be
paid in shares of Common Stock  pursuant to Section  2.1(b),  the number of such
shares to be issued by the  Borrower  to the Holder on such  Repayment  Date (in
respect of such portion of the Monthly Amount converted into in shares of Common
Stock pursuant to Section  2.1(b)),  shall be the number  determined by dividing
(x) the portion of the Monthly Amount  converted into shares of Common Stock, by
(y) the then applicable Fixed Conversion Price. For purposes hereof,  the "Fixed
Conversion Price" means $0.10.

          (b) Monthly Amount Conversion Guidelines.  Subject to Sections 2.1(a),
2.2, and 3.2 hereof, the Holder shall convert into shares of Common Stock all or
a portion of the Monthly  Amount due on each  Repayment  Date  according  to the
following guidelines (the "Conversion  Criteria"):  (i) the closing price of the
Common Stock as reported by Bloomberg,  L.P. on the Principal Market on the date
such  Repayment  Date  shall  be  greater  than or  equal  to 115% of the  Fixed
Conversion  Price and (ii) the amount of such  conversion does not exceed twenty
five percent (25%) of the aggregate  dollar  trading  volume of the Common Stock
for the twenty two (22) day trading period immediately  preceding the applicable
Repayment Date. If the Conversion Criteria are not met, the Holder shall convert
only such part of the Monthly  Amount that meets the  Conversion  Criteria.  Any
part of the Monthly  Amount due on a Repayment Date that the Holder has not been
able to  convert  into  shares  of  Common  Stock  due to  failure  to meet  the
Conversion  Criteria,  shall be paid by the Borrower in cash at the rate of 102%
of the Monthly  Amount  otherwise due on such Repayment  Date,  within three (3)
business days of the applicable Repayment Date.

                                       2

          2.2  No  Effective  Registration.   Notwithstanding  anything  to  the
contrary  herein,  none  of the  Borrower's  obligations  to the  Holder  may be
converted  into  Common  Stock  unless  (i)  either  (x)  an  effective  current
Registration  Statement  (as  defined  in  the  Registration  Rights  Agreement)
covering the shares of Common Stock to be issued in connection with satisfaction
of such obligations  exists or (y) an exemption from  registration of the Common
Stock is  available  to pursuant to Rule 144 of the  Securities  Act and (ii) no
Event of  Default  hereunder  exists  and is  continuing,  unless  such Event of
Default is cured within any  applicable  cure period or is  otherwise  waived in
writing by the Holder in whole or in part at the Holder's option.

          2.3 Optional  Redemption in Cash. The Borrower will have the option of
prepaying  this Note  ("Optional  Redemption")  by paying to the Holder a sum of
money equal to one hundred thirty percent (130%) of the principal amount of this
Note  together  with accrued but unpaid  interest  thereon and any and all other
sums due, accrued or payable to the Holder arising under this Note, the Purchase
Agreement, or any Related Agreement (the "Redemption Amount") outstanding on the
Redemption  Payment Date (as defined  below).  The Borrower shall deliver to the
Holder a written notice of redemption  (the "Notice of  Redemption")  specifying
the date for such Optional  Redemption (the  "Redemption  Payment Date"),  which
date shall be ten (10)  business days after the date of the Notice of Redemption
(the  "Redemption  Period").  A Notice of Redemption shall not be effective with
respect to any portion of this Note for which the Holder has a pending  election
to convert pursuant to Section 3.1, or for conversions  initiated or made by the
Holder  pursuant to Section 3.1 during the  Redemption  Period.  The  Redemption
Amount shall be  determined as if such  Holder's  conversion  elections had been
completed  immediately  prior to the date of the  Notice of  Redemption.  On the
Redemption Payment Date, the Redemption Amount must be paid in good funds to the
Holder.  In the event the  Borrower  fails to pay the  Redemption  Amount on the
Redemption Payment Date as set forth herein, then such Redemption Notice will be
null and void.



                                   ARTICLE III
                                CONVERSION RIGHTS

          3.1. Holder's  Conversion Rights. The Holder shall have the right, but
not  the  obligation,  to  convert  all or any  portion  of the  then  aggregate
outstanding  principal amount of this Note,  together with interest and fees due
hereon,  into shares of Common  Stock  subject to the terms and  conditions  set
forth in this Article III. The Holder may exercise such right by delivery to the
Borrower of a written  notice of  conversion  not less than one (1) day prior to
the date upon which such conversion  shall occur.  The shares of Common Stock to
be  issued  upon such  conversion  are  herein  referred  to as the  "Conversion
Shares."

                                       3

          3.2 Conversion Limitation.  Notwithstanding  anything contained herein
to the  contrary,  the Holder  shall not be entitled to convert  pursuant to the
terms of this Note an  amount  that  would be  convertible  into that  number of
Conversion  Shares  which  would  exceed  the  difference  between  4.99% of the
outstanding  shares of Common  Stock of the Borrower and the number of shares of
Common  Stock  beneficially  owned by such Holder or issuable  upon  exercise of
warrants  held by such  Holder.  For the purposes of the  immediately  preceding
sentence,  beneficial  ownership  shall be determined in accordance with Section
13(d) of the Exchange Act and Regulation 13d-3  thereunder.  The Holder may void
the Conversion Share limitation described in this Section 3.2 upon 75 days prior
notice to the  Borrower  or  without  any  notice  requirement  upon an Event of
Default.

          3.3 Mechanics of Holder's Conversion. (a) In the event that the Holder
elects to convert this Note into Common  Stock,  the Holder shall give notice of
such  election by  delivering  an executed and  completed  notice of  conversion
("Notice of  Conversion")  to the Borrower and such Notice of  Conversion  shall
provide a  breakdown  in  reasonable  detail of the  Principal  Amount,  accrued
interest  and fees being  converted.  On each  Conversion  Date (as  hereinafter
defined) and in accordance with its Notice of Conversion,  the Holder shall make
the appropriate reduction to the Principal Amount,  accrued interest and fees as
entered in its records and shall provide  written notice thereof to the Borrower
within two (2) business  days after the  Conversion  Date.  Each date on which a
Notice of  Conversion  is delivered or  telecopied to the Borrower in accordance
with the provisions  hereof shall be deemed a Conversion  Date (the  "Conversion
Date").  A form of Notice of  Conversion to be employed by the Holder is annexed
hereto as Exhibit A.

          (b)  Pursuant to the terms of the Notice of  Conversion,  the Borrower
will issue  instructions  to the  transfer  agent  accompanied  by an opinion of
counsel  within one (1)  business day of the date of the delivery to Borrower of
the Notice of  Conversion  and shall cause the  transfer  agent to transmit  the
certificates  representing the Conversion  Shares to the Holder by crediting the
account of the Holder's  designated broker with the Depository Trust Corporation
("DTC") through its Deposit  Withdrawal Agent Commission  ("DWAC") system within
three  (3)  business  days  after  receipt  by the  Borrower  of the  Notice  of
Conversion (the "Delivery  Date"). In the case of the exercise of the conversion
rights set forth herein the  conversion  privilege  shall be deemed to have been
exercised  and the  Conversion  Shares  issuable upon such  conversion  shall be
deemed to have been  issued  upon the date of  receipt  by the  Borrower  of the
Notice of Conversion. The Holder shall be treated for all purposes as the record
holder of such Common  Stock,  unless the Holder  provides the Borrower  written
instructions to the contrary.


          3.4 Conversion Mechanics.

                                       4

          (a) The  number  of shares  of  Common  Stock to be  issued  upon each
conversion  of this Note shall be  determined  by dividing  that  portion of the
principal and interest and fees to be converted,  if any, by the then applicable
Fixed Conversion Price. In the event of any conversions of outstanding principal
amount under this Note in part  pursuant to this Article III,  such  conversions
shall be  deemed to  constitute  conversions  of  outstanding  principal  amount
applying to Monthly Amounts for the remaining  Repayment Dates in  chronological
order.

          (b) The Fixed  Conversion Price and number and kind of shares or other
securities to be issued upon  conversion  is subject to adjustment  from time to
time upon the occurrence of certain events, as follows:

          A. Stock Splits,  Combinations and Dividends.  If the shares of Common
Stock are  subdivided or combined into a greater or smaller  number of shares of
Common  Stock,  or if a dividend  is paid on the Common  Stock or any  preferred
stock issued by the  Borrower in shares of Common  Stock,  the Fixed  Conversion
Price or the  Conversion  Price,  as the case may be,  shall be  proportionately
reduced in case of subdivision  of shares or stock  dividend or  proportionately
increased in the case of combination  of shares,  in each such case by the ratio
which the total number of shares of Common Stock  outstanding  immediately after
such  event  bears to the total  number of  shares of Common  Stock  outstanding
immediately prior to such event.

          B. During the period the  conversion  right exists,  the Borrower will
reserve from its  authorized  and unissued  Common Stock a sufficient  number of
shares to provide for the issuance of Common Stock upon the full  conversion  of
this Note. The Borrower represents that upon issuance,  such shares will be duly
and validly issued, fully paid and non-assessable.  The Borrower agrees that its
issuance of this Note shall  constitute full authority to its officers,  agents,
and transfer agents who are charged with the duty of executing and issuing stock
certificates  to  execute  and issue the  necessary  certificates  for shares of
Common Stock upon the conversion of this Note.

          C. Share Issuances.  Subject to the provisions of this Section 3.4, if
the Borrower  shall at any time prior to the  conversion or repayment in full of
the Principal Amount issue any shares of Common Stock or securities  convertible
into Common  Stock to a person  other than the Holder  (except  (i)  pursuant to
Subsections  A  or B  above;  (ii)  pursuant  to  options,  warrants,  or  other
obligations  to issue  shares  outstanding  on the date hereof as  disclosed  to
Holder in writing;  or (iii)  pursuant to options  that may be issued  under any
employee  incentive  stock option and/or any qualified stock option plan adopted
by the Borrower) for a consideration per share (the "Offer Price") less than the
Fixed  Conversion  Price in effect at the time of such issuance,  then the Fixed
Conversion  Price  shall be  immediately  reset to such lower Offer Price at the
time of issuance of such  securities  For purposes  hereof,  the issuance of any
security of the Borrower  convertible  into or exercisable or  exchangeable  for
Common Stock shall result in an adjustment to the Fixed  Conversion Price at the
time of issuance of such securities.

                                       5

          D.  Reclassification,  etc.  If the  Borrower  at any time  shall,  by
reclassification  or  otherwise,  change  the  Common  Stock  into the same or a
different  number of  securities  of any class or classes,  this Note, as to the
unpaid Principal Amount and accrued interest thereon, shall thereafter be deemed
to evidence the right to purchase an adjusted number of such securities and kind
of  securities  as would have been  issuable  as the result of such  change with
respect to the Common Stock immediately prior to such  reclassification or other
change.

          3.5 Issuance of New Note. Upon any partial  conversion of this Note, a
new Note  containing  the same date and  provisions  of this Note shall,  at the
request of the Holder, be issued by the Borrower to the Holder for the principal
balance of this Note and interest  which shall not have been  converted or paid.
Subject to the provisions of Article IV, the Borrower will pay no costs, fees or
any other  consideration  to the Holder for the production and issuance of a new
Note.

                                   ARTICLE IV
                                EVENTS OF DEFAULT

          Upon the occurrence and  continuance of an Event of Default beyond any
applicable grace period, the Holder may make all sums of principal, interest and
other fees then remaining unpaid hereon and all other amounts payable  hereunder
immediately due and payable.  In the event of such an  acceleration,  the amount
due and owing to the Holder shall be 130% of the outstanding principal amount of
the Note (plus  accrued  and unpaid  interest  and fees,  if any) (the  "Default
Payment").  The  Default  Payment  shall  be  applied  first to any fees due and
payable  to  Holder  pursuant  to the Note or the  Related  Agreements,  then to
accrued and unpaid  interest due on the Note and then to  outstanding  principal
balance of the Note.

          The  occurrence of any of the  following  events set forth in Sections
4.1 through 4.10, inclusive, is an "Event of Default":

          4.1 Failure to Pay  Principal,  Interest or other Fees.  The  Borrower
fails to pay when due any  installment  of  principal,  interest  or other  fees
hereon in accordance herewith,  or the Borrower fails to pay when due any amount
due under any other  promissory  note issued by Borrower,  and in any such case,
such failure  shall  continue for a period of three (3) days  following the date
upon which any such payment was due.

          4.2 Breach of  Covenant.  The  Borrower  breaches  any covenant or any
other term or condition  of this Note or the Purchase  Agreement in any material
respect, or the Borrower or any of its Subsidiaries breaches any covenant or any
other term or condition of any Related Agreement in any material respect and, in
any such  case,  such  breach,  if subject  to cure,  continues  for a period of
fifteen (15) days after the occurrence thereof.

          4.3 Breach of  Representations  and Warranties.  Any representation or
warranty made by the Borrower in this Note or the Purchase Agreement,  or by the
Borrower or any of its Subsidiaries in any Related Agreement, shall, in any such
case,  be false or  misleading  in any  material  respect  on the date that such
representation or warranty was made or deemed made.

                                       6

          4.4 Receiver or Trustee. The Borrower or any of its Subsidiaries shall
make an assignment for the benefit of creditors,  or apply for or consent to the
appointment  of a receiver  or trustee for it or for a  substantial  part of its
property  or  business;  or  such a  receiver  or  trustee  shall  otherwise  be
appointed.

          4.5 Judgments. Any money judgment, writ or similar final process shall
be entered or filed  against the Borrower or any of its  Subsidiaries  or any of
their  respective  property  or other  assets for more than  $50,000,  and shall
remain unvacated, unbonded or unstayed for a period of thirty (30) days.

          4.6 Bankruptcy. Bankruptcy, insolvency,  reorganization or liquidation
proceedings  or other  proceedings or relief under any bankruptcy law or any law
for the relief of debtors  shall be instituted by or against the Borrower or any
of its Subsidiaries.

          4.7 Stop Trade.  An SEC stop trade order or Principal  Market  trading
suspension of the Common Stock shall be in effect for five (5) consecutive  days
or five (5) days during a period of ten (10) consecutive days,  excluding in all
cases a  suspension  of all trading on a  Principal  Market,  provided  that the
Borrower shall not have been able to cure such trading  suspension within thirty
(30) days of the notice  thereof or list the Common  Stock on another  Principal
Market  within sixty (60) days of such notice.  The  "Principal  Market" for the
Common Stock shall include the NASD OTC Bulletin Board,  NASDAQ SmallCap Market,
NASDAQ  National  Market  System,  American  Stock  Exchange,  or New York Stock
Exchange  (whichever  of the  foregoing  is at the  time the  principal  trading
exchange or market for the Common Stock).

          4.8 Failure to Deliver Common Stock or Replacement  Note. The Borrower
shall fail (i) to timely deliver  Common Stock to the Holder  pursuant to and in
the form required by this Note, and Section 9 of the Purchase Agreement, if such
failure  to  timely  deliver  Common  Stock  shall not be cured  within  two (2)
business days or (ii) to deliver a  replacement  Note to Holder within seven (7)
business days  following  the required  date of such  issuance  pursuant to this
Note, the Purchase  Agreement or any Related  Agreement (to the extent  required
under such agreements).

          4.9  Default  Under  Related  Agreements  or  Other  Agreements.   The
occurrence  and  continuance of any Event of Default (as defined in the Purchase
Agreement or any Related  Agreement)  or any event of default (or similar  term)
under any other indebtedness.

          4.10 Change in Control.  The occurrence of a change in the controlling
ownership of the Borrower.

                           DEFAULT RELATED PROVISIONS

          4.11 Default  Interest  Rate.  Following the occurrence and during the
continuance of an Event of Default,  the Borrower shall pay additional  interest
on  this  Note in an  amount  equal  to two  percent  (2%)  per  month,  and all
outstanding  obligations  under  this Note,  including  unpaid  interest,  shall
continue  to accrue  such  additional  interest  from the date of such  Event of
Default until the date such Event of Default is cured or waived.

                                       7

          4.12  Conversion  Privileges.  The conversion  privileges set forth in
Article  III shall  remain in full  force and effect  immediately  from the date
hereof and until this Note is paid in full.

          4.13  Cumulative  Remedies.  The  remedies  under  this Note  shall be
cumulative.


                                    ARTICLE V
                                  MISCELLANEOUS

          5.1 Failure or Indulgence Not Waiver.  No failure or delay on the part
of the Holder hereof in the exercise of any power, right or privilege  hereunder
shall operate as a waiver thereof,  nor shall any single or partial  exercise of
any such power, right or privilege preclude other or further exercise thereof or
of any other  right,  power or  privilege.  All  rights  and  remedies  existing
hereunder  are  cumulative  to, and not  exclusive  of,  any rights or  remedies
otherwise available.

          5.2 Notices. Any notice herein required or permitted to be given shall
be in writing and shall be deemed  effectively given: (a) upon personal delivery
to the party  notified,  (b) when sent by  confirmed  telex or facsimile if sent
during normal business hours of the recipient, if not, then on the next business
day,  (c) five days after  having been sent by  registered  or  certified  mail,
return receipt requested,  postage prepaid,  or (d) one day after deposit with a
nationally  recognized  overnight  courier,  specifying next day delivery,  with
written  verification  of  receipt.  All  communications  shall  be  sent to the
Borrower  at  the  address  provided  in  the  Purchase  Agreement  executed  in
connection  herewith,  and to the Holder at the address provided in the Purchase
Agreement  for such  Holder,  with a copy to John E.  Tucker,  Esq.,  825  Third
Avenue,  14th Floor, New York, New York 10022,  facsimile number (212) 541-4434,
or at such other address as the Borrower or the Holder may designate by ten days
advance written notice to the other parties hereto. A Notice of Conversion shall
be deemed given when made to the Borrower pursuant to the Purchase Agreement.

          5.3 Amendment Provision. The term "Note" and all reference thereto, as
used  throughout  this  instrument,  shall mean this  instrument  as  originally
executed,  or  if  later  amended  or  supplemented,   then  as  so  amended  or
supplemented,  and any  successor  instrument  issued  pursuant  to Section  3.5
hereof, as it may be amended or supplemented.

          5.4  Assignability.  This Note shall be binding  upon the Borrower and
its successors and assigns, and shall inure to the benefit of the Holder and its
successors and assigns, and may be assigned by the Holder in accordance with the
requirements of the Purchase  Agreement.  This Note shall not be assigned by the
Borrower without the consent of the Holder.

          5.5  Governing  Law.  This Note shall be governed by and  construed in
accordance with the laws of the State of New York,  without regard to principles
of  conflicts  of laws.  Any action  brought by either  party  against the other
concerning the transactions contemplated by this Agreement shall be brought only
in the state courts of New York or in the federal courts located in the State of
New York.  Both  parties and the  individual  signing this Note on behalf of the
Borrower  agree to submit to the  jurisdiction  of such courts.  The  prevailing
party  shall  be  entitled  to  recover  from the  other  party  its  reasonable
attorney's  fees and  costs.  In the event  that any  provision  of this Note is
invalid or unenforceable  under any applicable statute or rule of law, then such
provision  shall  be  deemed  inoperative  to the  extent  that it may  conflict
therewith  and shall be deemed  modified to conform with such statute or rule of

                                       8

law. Any such provision which may prove invalid or  unenforceable  under any law
shall not affect the validity or  enforceability  of any other provision of this
Note. Nothing contained herein shall be deemed or operate to preclude the Holder
from  bringing  suit or taking  other legal  action  against the Borrower in any
other  jurisdiction  to  collect on the  Borrower's  obligations  to Holder,  to
realize on any  collateral  or any other  security for such  obligations,  or to
enforce a judgment or other court in favor of the Holder.

          5.6 Maximum  Payments.  Nothing  contained  herein  shall be deemed to
establish  or require  the  payment of a rate of  interest  or other  charges in
excess of the maximum permitted by applicable law. In the event that the rate of
interest  required  to be paid or other  charges  hereunder  exceed the  maximum
permitted by such law, any payments in excess of such maximum  shall be credited
against  amounts  owed by the  Borrower  to the Holder and thus  refunded to the
Borrower.

          5.7  Security  Interest and  Guarantee.  The Holder has been granted a
security  interest (i) in certain assets of the Borrower and its Subsidiaries as
more fully  described  in the  Master  Security  Agreement  dated as of the date
hereof and (ii)  pursuant  to the Stock  Pledge  Agreement  dated as of the date
hereof.  The  obligations  of the  Borrower  under this Note are  guaranteed  by
certain  Subsidiaries of the Borrower pursuant to the Subsidiary  Guaranty dated
as of the date hereof.

          5.8  Construction.  Each  party  acknowledges  that its legal  counsel
participated in the preparation of this Note and, therefore, stipulates that the
rule of construction  that  ambiguities are to be resolved  against the drafting
party shall not be applied in the interpretation of this Note to favor any party
against the other.

          5.9 Cost of  Collection.  If  default  is made in the  payment of this
Note, the Borrower shall pay to Holder reasonable costs of collection, including
reasonable attorney's fees.



       [Balance of page intentionally left blank; signature page follows.]



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         IN WITNESS WHEREOF, the Borrower has caused this Note to be signed in
its name effective as of this __ day of February, 2005.


                                                   SCIENCE DYNAMICS CORPORATION


                                                   By:________________________
                                                   Name:______________________
                                                   Title:_____________________

WITNESS:


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






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                                    EXHIBIT A

                              NOTICE OF CONVERSION

(To be  executed  by the Holder in order to convert all or part of the Note into
Common Stock

[Name and Address of Holder]


The  Undersigned  hereby  converts  $_________  of the principal due on [specify
applicable  Repayment  Date] under the  Convertible  Term Note issued by SCIENCE
DYNAMICS  CORPORATION  dated  February  11, 2005 by delivery of Shares of Common
Stock of SCIENCE DYNAMICS CORPORATION on and subject to the conditions set forth
in Article III of such Note.


1.       Date of Conversion         _______________________

2.       Shares To Be Delivered:    _______________________


                                    By:_______________________________
                                    Name:_____________________________
                                    Title:______________________________



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