Exhibit 4.1
                                                                     -----------

                                 Form of Warrant
                                 ---------------

THE SECURITIES  REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933, AS AMENDED (THE  "SECURITIES  ACT"), OR APPLICABLE STATE SECURITIES
LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD,  TRANSFERRED,  ASSIGNED,
PLEDGED OR  HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE  REGISTRATION  STATEMENT
FOR THE SECURITIES  UNDER THE SECURITIES ACT, OR IRIS  INTERNATIONAL,  INC. (THE
"COMPANY") SHALL HAVE RECEIVED AN OPINION FROM COUNSEL  REASONABLY  SATISFACTORY
TO THE COMPANY THAT REGISTRATION OF SUCH SECURITIES UNDER THE SECURITIES ACT AND
UNDER THE  PROVISIONS OF  APPLICABLE  FEDERAL AND STATE  SECURITIES  LAWS IS NOT
REQUIRED.

                            IRIS INTERNATIONAL, INC.

REDEEMABLE WARRANT TO PURCHASE __________ SHARES OF COMMON STOCK

Warrant No.:__________

Date of Issuance:  April __, 2004

Iris  International,  Inc.,  a  Delaware  corporation  (the  "Company"),  hereby
certifies that, for good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged,  ____________, the registered holder hereof or
its permitted assigns, is entitled,  subject to the terms and conditions of this
Warrant and of that certain Securities Purchase Agreement, dated  April 19, 2004
by and between the  Company  and the holder (as such  agreement  may be amended,
supplemented  and modified  from time to time,  the  "Purchase  Agreement"),  to
purchase from the Company,  upon surrender of this Warrant (as defined below) at
its  principal  office  in the  United  States  located  at  9172  Eton  Avenue,
Chatsworth,  California  91311 (or such other location as the Company may advise
the holder hereof in writing), at any time or times on or after the date hereof,
but not after 5:00 p.m.,  Eastern  Standard  Time,  on the  Expiration  Date (as
defined below),  ______________  fully paid nonassessable shares of Common Stock
(as defined  below) of the Company at the Exercise  Price per share  provided in
Section 1 of this  Warrant,  such  Exercise  Price and such  number of shares of
Common  Stock to be  delivered  upon  exercise of the Warrant  being  subject to
adjustment as provided in Section 9 of this Warrant.  This Warrant is redeemable
by the Company in accordance  with the terms and conditions set forth in Section
4 of this Warrant.  Capitalized terms used herein but not defined shall have the
same meanings assigned to them in the Purchase Agreement.

Section 1.  Definitions.  The following terms as used in this Warrant shall have
the following meanings:

"Business Day" means any day other than  Saturday,  Sunday or other day on which
commercial banks in the City of New York, New York are required by law to remain
closed.

                                       1


"Common  Stock" means (i) the common  stock,  par value $0.01 per share,  of the
Company, and (ii) any capital stock into which such Common Stock shall have been
changed or any capital stock  resulting from a  reclassification  of such Common
Stock.

"Exchange  Act" means the  Securities  Exchange Act of 1934,  as amended and the
rules and regulations promulgated thereunder.

"Exercise  Delivery  Documents" shall have the meaning specified in Section 2(a)
hereof.

"Exercise  Price"  shall be equal to $7.80,  subject  to further  adjustment  as
hereinafter provided.

"Expiration  Date"  means  April 19,  2009 or,   if such date does not fall on a
Business Day, then the next Business Day.

"Person" means an individual,  a limited liability   company,  a partnership,  a
joint  venture,  a  corporation,  a trust,  an  unincorporated  organization  or
association and a government or any department or agency thereof.

"Principal Market" means the Nasdaq National Market ("Nasdsaq") or if the Common
Stock is not traded on the Nasdaq,  the then  principal  securities  exchange or
trading market for the Common Stock.

"Securities Act" means the Securities Act of 1933, as amended, and the rules and
regulations promulgated thereunder.

"Trading  Day"  shall mean (x) a day on which the  Principal  Market is open for
business  or (y) if the  applicable  security  is not so listed  on a  Principal
Market or admitted for trading or quotation, a Business Day.

"Trading Price" of a security on any date of determination means:

      (1) the closing sales price as reported by the Nasdaq  National  Market on
      such date;

      (2) if such security is not so reported, the closing sale price (or, if no
      closing  sale price is  reported,  the last  reported  sale price) of such
      security (regular way) on the New York Stock Exchange on such date;

      (3) if such  security  is not  listed  for  trading  on the New York Stock
      Exchange  on any such date,  the  closing  sale price as  reported  in the
      composite transactions for the principal U.S. securities exchange on which
      such security is so listed;

      (4)  if  such  security  is not  listed  on a U.S.  national  or  regional
      securities exchange, the last price quoted by Interactive Data Corporation
      for such security on such date or, if Interactive  Data Corporation is not
      quoting such price, a similar quotation service selected by the Company;

                                       2


      (5) if such security is not so quoted, the average of the mid-point of the
      last bid and ask prices for such  security  on such date from at least two
      dealers  recognized as  market-makers  for such  security  selected by the
      Company for this purpose; or

      (6) if such  security  is not so quoted,  the average of that last bid and
      ask prices  for such  security  on such date from a dealer  engaged in the
      trading  of  convertible  securities  selected  by the  Company  for  this
      purpose.

"Transfer Agent" has the meaning specified in Section 2(a) hereof.

"Warrant" means this Warrant and the other warrants to purchase shares of Common
Stock issued  pursuant to the  Purchase  Agreement  and all  warrants  issued in
exchange, transfer or replacement thereof.

"Warrant Date" has the meaning specified in Section 3 hereof.

"Warrant  Shares" means all shares of Common Stock issuable upon exercise of the
Warrants.

      The definition of certain other terms are specified in Section 9 hereof.

Section 2. Exercise of Warrant.

      (a)  Subject  to the  terms  and  conditions  hereof,  including,  without
limitation,  Section  2(c),  this Warrant may be exercised by the holder  hereof
then registered as such on the books of the Company, in whole or in part, at any
time on any  Business  Day on or after the date  hereof  and prior to 5:00 p.m.,
Eastern  Standard  Time,  on the  Expiration  Date by: (i) delivery of a written
notice, in the form of the subscription notice attached as Exhibit A hereto or a
reasonable  facsimile  thereof (the "Exercise  Notice"),  to the Company and the
Company's  designated  transfer agent (the "Transfer  Agent"),  of such holder's
election to exercise  all or a portion of this  Warrant;  (ii) the  surrender of
this Warrant to the  Company;  and (iii) the payment of the  aggregate  Exercise
Price to the Company by wire transfer or by certified  bank check payable to the
order of the  Company  in  United  States  dollars  (the  items to be  delivered
pursuant to clauses  (i),  (ii) and (iii)  above  collectively  are  referred to
herein as the " Exercise Delivery Documents");  provided,  however, that if such
Warrant  Shares are to be issued in any name  other than that of the  registered
holder  of this  Warrant,  such  issuance  shall be  deemed a  transfer  and the
provisions of Section 8 of this Warrant shall be applicable. In the event of any
exercise  of the rights  represented  by this  Warrant in  compliance  with this
Section 2(a) and Section 2(c), the Company shall, within three (3) Business Days
after  receipt of the  Exercise  Delivery  Documents,  issue and  deliver to the
address  specified in the Exercise Notice, a certificate or certificates in such
denominations  as may  be  requested  by the  holder  in  the  Exercise  Notice,
registered in the name of the holder or its  designee,  for the number of shares
of Common Stock to which the holder shall be entitled upon such  exercise.  Upon
delivery of the Exercise Delivery Documents, the holder of this Warrant shall be
deemed for all  corporate  purposes  to have  become the holder of record of the
Warrant  Shares  with  respect  to  which  this  Warrant  has  been   exercised,
irrespective  of the date of delivery the  certificates  evidencing such Warrant
Shares.

                                       3


      (b) Unless the rights  represented  by this Warrant  shall have expired or
shall have been fully  exercised,  the Company shall,  within three (3) Business
Days after receipt of the Exercise Delivery  Documents,  and at its own expense,
issue a new Warrant  identical in all respects to this Warrant  exercised except
it shall represent  rights to purchase the number of Warrant Shares  purchasable
immediately  prior to such  exercise  under  this  Warrant,  less the  number of
Warrant Shares with respect to which this Warrant is exercised.

      (c)  Notwithstanding  anything  contained in this Warrant to the contrary,
this Warrant cannot be exercised, either in whole or in part, except by a holder
who,  at the time of  exercise,  is an  "accredited  investor,"  as such term is
defined in Rule 501(a) of Regulation D under the Securities Act.

      (d)  Notwithstanding  anything  contained in this Warrant to the contrary,
the Company  shall not be required to issue  fractions of shares of Common Stock
upon  exercise of this Warrant or to  distribute  certificates  evidencing  such
fractional  shares.  If more than one Warrant shall be presented for exercise in
full at the same time by the same  holder,  the number of full  shares of Common
Stock shall be issuable upon the exercise thereof shall be computed on the basis
of the aggregate number of shares of Common Stock purchasable on exercise of all
Warrants so presented.  In lieu of any fractional shares, there shall be paid to
the holder an amount of cash equal to the same  fraction of the  current  market
value of a share of Common Stock. For purposes of this Section 2(d), the current
market value of a share of Common Stock shall be the Trading Price of a share of
Common Stock for the Trading Day immediately prior to the date of such exercise.

      (e) The holder may utilize a Cashless Exercise,  as provided below, if the
Holder's Warrant Shares are not subject to an effective Registration  Statement.
The holder,  upon a Cashless  Exercise of the  Warrant,  will  receive upon such
exercise the "Net Number" of shares of Common Stock as  determined  according to
the following formula (a "Cashless Exercise"):

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

            For purposes of the foregoing formula:

      X = the Net Number of shares of Common Stock to be issued to the Holder.

      Y = the number of shares of Common Stock subject to this Warrant for which
the Warrant is being exercised.

      A = the Current Market Value of one share of Common Stock on the date this
Warrant is being exercised.

      B = the Exercise Price then in effect for the applicable Warrant Shares at
the time of such exercise, as adjusted.

                                       4


      (f) If by the third Trading Day after a Date of Exercise the Company fails
to deliver the required number of Warrant Shares in the manner required pursuant
to  Section 2, then the holder  will have the right to  rescind  such  exercise.


      (g) If by the third Trading Day after a Date of Exercise the Company fails
to deliver the required number of Warrant Shares in the manner required pursuant
to Section 2, and if after such third  Trading  Day and prior to the  receipt of
such Warrant  Shares,  the holder  purchases (in an open market  transaction  or
otherwise)  shares of Common Stock to deliver in  satisfaction  of a sale by the
holder of the Warrant  Shares which the holder  anticipated  receiving upon such
exercise (a "Buy-In"),  then the Company shall (1) pay in cash to the holder the
amount by which (x) the  holder's  total  purchase  price  (including  brokerage
commissions, if any) for the shares of Common Stock so purchased exceeds (y) the
amount obtained by multiplying (A) the number of Warrant Shares that the Company
was required to deliver to the holder in  connection  with the exercise at issue
by (B) the closing bid price of the Common  Stock at the time of the  obligation
giving  rise to such  purchase  obligation  and (2) at the option of the holder,
either  reinstate  the portion of the Warrant and  equivalent  number of Warrant
Shares  for which  such  exercise  was not  honored or deliver to the holder the
number of shares of Common  Stock that would  have been  issued had the  Company
timely complied with its exercise and delivery obligations hereunder. The holder
shall provide the Company  written notice  indicating the amounts payable to the
holder in respect of the Buy-In.

Section 3. Date; Duration. The issue date of this Warrant is April __, 2004 (the
"Warrant  Date").  This Warrant,  in all events,  shall be wholly void and of no
effect at 5:00 pm Eastern Standard Time on the Expiration Date.

Section  4.  Redemption.  This  Warrant  may be  redeemed  at the  option of the
Company,  at a redemption price of $0.10 per share of Common Stock issuable upon
exercise of the Warrant (the  "Redemption  Price"),  at any time after the first
anniversary of the Closing Date,  provided that the Trading Price for the Common
Stock, as reported by the Principal Market,  shall have equaled or exceeded 175%
of the then current  Exercise  Price (a  "Qualifying  Price") for any 20 Trading
Days in any 30  Trading  Day  period (a  "Qualifying  Period")  ending  within 5
Trading Days of the Notice of Redemption (as defined  below),  provided  further
that (i) all of the shares of Common  Stock  issuable  hereunder  either (A) are
registered  for resale  pursuant  to an  effective  Registration  Statement  (as
defined in the Purchase  Agreement)  which is available for sales of such shares
of Common  Stock at all  times  commencing  on the  first day of the  Qualifying
Period and ending on the redemption date or (B) no longer constitute Registrable
Shares (as defined in the Purchase Agreement) and (ii) the average daily trading
volume of the Common  Stock  during  Qualifying  Period is greater  than 100,000
shares per day as reported by the  Principal  Market.  In the event the Exercise
Price is adjusted  pursuant to Section 9 hereof,  the Redemption  Price shall be
subject to adjustment by the same percentage  change as the percentage change in
the Exercise  Price.  Holders  shall be given notice of  redemption  ("Notice of
Redemption")  at least 30 days  prior to the date  fixed for  redemption  of the
Warrant. Each Notice of Redemption shall state:

            (i) the redemption date;

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            (ii) the date by which the redemption right must be exercised;

            (iii) the Redemption Price;

            (iv) a description  of the  procedure  which a holder of the Warrant
must follow to exercise a redemption  right,  and the place or places where such
Warrants are to be surrendered for payment of the Redemption Price;

            (v) that on the redemption date the Redemption Price will become due
and payable upon each such Warrant  designated by the holder to be  repurchased;
and

            (vi) the  place or  places  that the  Warrant  certificate  shall be
delivered.

On and  after  the  date  fixed  for  redemption  set  forth  in the  Notice  of
Redemption,  the holder of this Warrant shall have no rights with respect to the
Warrants except, upon surrender of this Warrant, to receive the Redemption Price
for each share of Common Stock  issuable  upon  exercise of this  Warrant.  This
Warrant may be exercised up to and including the  redemption  date  specified in
such Notice of Redemption.

Section 5. Taxes.

      (a) The Company  shall pay any and all  documentary,  stamp,  transfer and
other  similar  taxes  that may be payable  with  respect  to the  issuance  and
delivery of Warrant Shares upon exercise of this Warrant.

      (b)  Notwithstanding  any other provision of this Warrant,  for income tax
purposes,  the holder or any assignee or transferee shall agree that the Company
and the Transfer  Agent shall be permitted to withhold from any amounts  payable
to such  assignee or  transferee  any taxes  required by law to be withheld from
such  amounts.  Unless  exempt from the  obligation  to do so, each  assignee or
transferee  shall execute and deliver to the Company or the Transfer  Agent,  as
applicable,  a properly completed Form W-8 or W-9, indicating that such assignee
or transferee is not subject to back-up  withholding  for United States  federal
income tax purposes.  Each  assignee or transferee  that does not deliver such a
form pursuant to the preceding  sentence shall have the burden of proving to the
Company's reasonable satisfaction that it is exempt from such requirement.

      (c) The  issuance  of  certificates  for  shares of Common  Stock upon the
exercise  of this  Warrant  shall be made  without  charge to the holder of this
Warrant  for any issue  tax in  respect  thereof;  provided,  however,  that the
Company  shall not be  required to pay any tax that may be payable in respect of
any transfer  involved in the issuance and delivery of any certificate in a name
other than that of the holder  hereof,  and the Company shall not be required to
issue or deliver  such  certificates  or other  securities  unless and until the
person or persons requesting the issuance thereof shall have paid to the Company
the  amount of such tax or shall have  established  to the  satisfaction  of the
Company that such tax has been paid.

                                       6


Section  6.  Warrant  Holder  Not  Deemed a  Stockholder.  Except  as  otherwise
specifically  provided herein, prior to the exercise of the Warrants represented
hereby, the holder of this Warrant shall not be entitled, as such, to any rights
of a stockholder of the Company,  including,  without  limitation,  the right to
vote or to consent to any action of the stockholders of the Company,  to receive
dividends or other distributions, to exercise any preemptive right or to receive
any notice of meetings of stockholders of the Company, and shall not be entitled
to receive any notice of any  proceedings of the Company.  In addition,  nothing
contained in this Warrant shall be construed as imposing any liabilities on such
holder to purchase any  securities  (upon exercise of this Warrant or otherwise)
or as a stockholder of the Company, whether such liabilities are asserted by the
Company or by creditors of the Company.

Section 7.  Compliance with Securities Laws.

      (a) The holder of this Warrant,  by the acceptance hereof,  represents and
warrants that it is acquiring this Warrant and the Warrant Shares  issuable upon
exercise of this Warrant for its own account for investment  only and not with a
view towards,  or for resale in connection with, the public sale or distribution
thereof,  except  pursuant to sales  registered or exempted under the Securities
Act; provided,  however,  that by making the representations  herein, the holder
does not agree to hold this Warrant or any of the Warrant Shares for any minimum
or other specific term and reserves the right to dispose of this Warrant and the
Warrant  Shares at any time in  accordance  with or pursuant  to a  registration
statement or an exemption  under the Securities  Act. The holder of this Warrant
further represents,  by acceptance hereof, that, as of this date, such holder is
an "accredited  investor" as such term is defined in Rule 501(a) of Regulation D
promulgated by the Securities and Exchange  Commission  under the Securities Act
and was not  organized  for the specific  purpose of  acquiring  the Warrants or
Warrant Shares.

      (b) The  holder of this  Warrant  understands  that,  until the end of the
holding  period  under  Rule  144(k)  of the  Securities  Act (or any  successor
provision)  this Warrant (and all securities  issued in exchange  therefor or in
substitution thereof, other than Warrant Shares, which shall bear the legend set
forth in Section 7(c) of this  Warrant,  if  applicable)  shall bear a legend in
substantially the following form:

            THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE
            SECURITIES  ACT OF 1933,  AS  AMENDED  (THE  "SECURITIES  ACT"),  OR
            APPLICABLE  STATE SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED
            FOR SALE, SOLD,  TRANSFERRED,  ASSIGNED,  PLEDGED OR HYPOTHECATED IN
            THE  ABSENCE  OF  AN  EFFECTIVE   REGISTRATION   STATEMENT  FOR  THE
            SECURITIES  UNDER THE SECURITIES  ACT, OR IRIS  INTERNATIONAL,  INC.
            (THE  "COMPANY")   SHALL  HAVE  RECEIVED  AN  OPINION  FROM  COUNSEL
            REASONABLY  SATISFACTORY  TO THE COMPANY THAT  REGISTRATION  OF SUCH
            SECURITIES  UNDER THE  SECURITIES  ACT AND UNDER THE  PROVISIONS  OF
            APPLICABLE FEDERAL AND STATE SECURITIES LAWS IS NOT REQUIRED.

                                       7


The legend set forth above  shall be removed  and the Company  shall issue a new
certificate  evidencing  a new  Warrant  of like tenor and  aggregate  number of
shares and which shall not bear the restrictive legends required by this Section
7(b): (i) if, in connection  with a sale  transaction,  such holder provides the
Company with an opinion of counsel  reasonably  acceptable to the Company to the
effect that a public sale,  assignment,  pledge or transfer of the  Warrant,  as
appropriate,  may be made without registration under the Securities Act, or (ii)
upon  expiration  of the two  year  holding  period  under  Rule  144(k)  of the
Securities Act (or any successor rule);  provided that the holder of the Warrant
is not and has not been within 3 months prior to such date,  an  "affiliate"  of
the  Company  (as such term is  defined in Rule 144 of the  Securities  Act) (in
which event such holding period shall be deemed to have expired when such holder
has not been an "affiliate" of the Company for the preceding three-month period)
.. The Company shall not require such opinion of counsel for the sale of Warrants
in accordance  with Rule 144 of the  Securities Act in the event that the holder
provides  such   representations  that  the  Company  shall  reasonably  request
confirming compliance with the requirements of Rule 144.

      (c) Subject to the terms of this clause (c), any certificate  representing
the Warrant Shares shall bear a legend in substantially the following form:

            THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE
SECURITIES ACT OF 1933, AS AMENDED (THE  "SECURITIES  ACT"), OR APPLICABLE STATE
SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD,  TRANSFERRED,
ASSIGNED,  PLEDGED OR HYPOTHECATED  IN THE ABSENCE OF AN EFFECTIVE  REGISTRATION
STATEMENT FOR THE SECURITIES  UNDER THE SECURITIES  ACT, OR IRIS  INTERNATIONAL,
INC.  (THE  "COMPANY")  SHALL HAVE  RECEIVED AN OPINION FROM COUNSEL  REASONABLY
SATISFACTORY  TO THE COMPANY  THAT  REGISTRATION  OF SUCH  SECURITIES  UNDER THE
SECURITIES  ACT AND  UNDER  THE  PROVISIONS  OF  APPLICABLE  FEDERAL  AND  STATE
SECURITIES LAWS IS NOT REQUIRED.

The legend set forth  above  shall be removed  and the  Company  shall issue the
Warrant  Shares  without  such legend to the holder of the  Warrant  Shares upon
which it is stamped,  (i) if the Warrant  Shares have been resold or transferred
pursuant to a  registration  statement  that was  effective  at the time of such
transfer,  (ii) if, in connection with a sale transaction,  such holder provides
the Company with an opinion of counsel  reasonably  acceptable to the Company to
the effect  that a public  sale,  assignment,  pledge or transfer of the Warrant
Shares may be made without  registration under the Securities Act, or (iii) upon
expiration of the  applicable  two year holding  period under Rule 144(k) of the

                                       8


Securities Act (or any successor rule);  provided that the holder of the Warrant
Shares  is not and has  not  been  within  3  months  prior  to  such  date,  an
"affiliate"  of the  Company  (as  such  term  is  defined  in  Rule  144 of the
Securities  Act) (in which  event such  holding  period  shall be deemed to have
expired  when such  holder has not been an  "affiliate"  of the  Company for the
preceding  three-month  period).  The Company  shall not require such opinion of
counsel for the sale of the Warrant  Shares in  accordance  with Rule 144 of the
Securities Act, provided that the holder provides such  representations that the
Company shall reasonably request confirming  compliance with the requirements of
Rule 144. The Company shall  irrevocably  instruct its transfer agent that, upon
presentation to the transfer agent of a completed Certificate of Subsequent Sale
(attached as Exhibit E to the  Purchase  Agreement),  the  transfer  agent shall
thereupon  re-issue a stock  certificate  representing the number of shares sold
without the legend set forth above.

Section 8.  Ownership and Transfer.

      (a) The Company shall maintain at its principal  office  designated on the
first page of this Agreement or such other office or agency of the Company as it
may  designate  by  notice  to the  holder  hereof  (provided  that  such  other
designated  office  shall  be  located  in the  United  States)  (a  "Designated
Office"),  a register for this Warrant (the  "Warrant  Register"),  in which the
Company  shall  record  the name and  address  of the  person in whose name this
Warrant has been issued.  Upon the transfer of any Warrants in  accordance  with
the  provisions  of clause  (b) below,  the  Company  shall  record the name and
address  of  such  new  holder(s)  as  well  as the  name  and  address  of each
transferee.  The  Company  may treat the  person in whose  name any  Warrant  is
registered  on the  Warrant  Register  as the owner and holder  thereof  for all
purposes,  notwithstanding  any  notice  to the  contrary,  but  in  all  events
recognizing any transfers made in accordance with the terms of this Warrant.

      (b)  This  Warrant  and all  rights  hereunder  shall  be  assignable  and
transferable  by the holder hereof to a Permitted  Transferee  upon surrender of
this  Warrant  with a  properly  executed  assignment  (in the form of Exhibit B
hereto) at the Company's  Designated Office. For the purposes of this Warrant, a
"Permitted  Transferee"  shall  mean  any  person  who  (a)  is  an  "accredited
investor,"  as that term is defined  in Rule  501(a) of  Regulation  D under the
Securities Act and (b) delivers to the Company his, her or its written agreement
to  accept  and be bound by all of the terms and  conditions  contained  in this
Warrant.

Section 9.  Adjustment  of  Exercise  Price and Number of Shares  Issuable  Upon
Exercise.  The Exercise Price and the number of Warrant Shares issuable upon the
exercise of each  Warrant are subject to  adjustment  from time to time upon the
occurrence of the events enumerated in this Section 9.

      (a)  In  case  the  Company  shall  hereafter  pay a  dividend  or  make a
distribution to all holders of the outstanding  Common Stock in shares of Common
Stock,  the  Exercise  Price in effect at the  opening of  business  on the date
following  the date fixed for the  determination  of  stockholders  entitled  to
receive such dividend or other distribution shall be reduced by multiplying such
Exercise  Price by a fraction of which (i) the numerator  shall be the number of
shares of Common Stock  outstanding  at the close of business on the record date
of this Warrant fixed for such  determination  and (ii) the denominator shall be
the sum of such number of shares and the total  number of shares  referred to in
(i) above  constituting such dividend or other  distribution.  Such reduction in
the  Exercise  Price shall  become  effective  immediately  after the opening of
business on the day following  the record date. If any dividend or  distribution

                                       9


of the type  described  in this Section 9(a) of this Warrant is declared but not
so paid or made,  the  Exercise  Price shall  again be adjusted to the  Exercise
Price that otherwise then be in effect if such dividend or distribution  had not
been declared.

      (b) In case the  outstanding  shares of Common  Stock shall be  subdivided
into a greater number of shares of Common Stock, the Exercise Price in effect at
the opening of business on the day following the day upon which such subdivision
becomes effective shall be proportionately reduced, and conversely,  in case the
outstanding  shares of Common Stock shall be combined  into a smaller  number of
shares of Common Stock,  the Exercise Price in effect at the opening of business
on the day following the day upon which such combination becomes effective shall
be  proportionately  increased,  such reduction or increase,  as applicable,  to
become effective  immediately after the opening of business on the day following
the day upon which such subdivision or combination becomes effective.

      (c) The  Company  may make  such  reductions  in the  Exercise  Price,  in
addition to those required by Sections 9(a) or (b) of this Warrant, as the Board
of  Directors  considers  to be advisable to avoid or diminish any income tax to
holders of Common Stock or rights to purchase  Common Stock  resulting  from any
dividend or distribution of stock (or rights to acquire stock) or from any event
treated as such for income tax purposes.

      (d) No  adjustment  in the  Exercise  Price shall be  required  under this
Section 9 unless  such  adjustment  would  require an increase or decrease of at
least 1% in the Exercise Price; provided, however, that any adjustments which by
reason of this Section 9(d) are not required to be made shall be carried forward
and taken into account in any subsequent adjustment. All calculations under this
Section 9 shall be made by the Company and shall be made to the nearest  cent or
to the nearest one hundredth of a share,  as the case may be. No adjustment need
be  made  for a  change  in the no par  value  of the  Common  Stock.

      (e) Notice to Holders of Warrants Prior to Certain Actions. In case:

            (1) the Company shall declare a dividend (or any other distribution)
on its Common  Stock that would  require an  adjustment  in the  Exercise  Price
pursuant to this Section 9;

            (2) of any  reclassification  of the  Common  Stock  of the  Company
(other than a subdivision  or  combination  of its  outstanding  Common Stock, a
change in par value, a change from par value to no par value or a change from no
par value to par value), or any merger, consolidation,  statutory share exchange
or  combination  to which the  Company is a party and for which  approval of any
stockholders of the Company is required,  or the sale, transfer or conveyance of
all or substantially all of the assets of the Company; or

            (3) of the  voluntary or  involuntary  dissolution,  liquidation  or
winding-up of the Company;

the Company  shall  cause to be  provided to the holder of this  Warrant at such
address  appearing  in the Warrant  Register at least ten (10) days prior to the

                                       10


applicable record or effective date hereinafter  specified, a notice stating (x)
the date on which a record  is to be taken  for the  purpose  of such  dividend,
distribution,  rights or warrants,  or, if a record is not to be taken, the date
as of which the  holders of shares of Common  Stock of record to be  entitled to
such dividend, distribution, rights or warrants are to be determined, or (y) the
date on which such  reclassification,  merger,  consolidation,  statutory  share
exchange, combination, sale, transfer, conveyance,  dissolution,  liquidation or
winding-up  is  expected  to  become  effective,  and the date as of which it is
expected  that  holders of Common  Stock of record shall be entitled to exchange
their shares of Common Stock for securities,  cash or other property deliverable
upon such  reclassification,  merger,  consolidation,  statutory share exchange,
combination, sale, transfer, dissolution,  liquidation or winding-up. Failure to
give such  notice,  or any defect  therein,  shall not affect  the  legality  or
validity of the  proceedings or actions  described in clauses (1) through (4) of
this  Section  9(e).  In addition,  whenever  the Exercise  Price is adjusted as
provided  in this  Section  9,  the  Company  shall  prepare  a  notice  of such
adjustment of the Exercise  Price setting forth the adjusted  Exercise Price and
the date on which each adjustment  becomes  effective and shall mail such notice
of such  adjustment  of the Exercise  Price to the holder of each Warrant at his
last address in the Warrant  Register  within  twenty (20) days of the effective
date of such  adjustment.  Failure to deliver such notice nor any defect therein
shall not effect the legality or validity of any such adjustment.

            (f) In any case in which this Section 9 provides  that an adjustment
shall become effective immediately after a record date for an event, the Company
may defer  until the  occurrence  of such event (i) issuing to the holder of any
Warrant exercised after such record date and before the occurrence of such event
the  additional  shares of Common Stock issuable upon such exercise by reason of
the  adjustment  required by such event over and above the Common Stock issuable
upon such exercise  before giving effect to such  adjustment  and (ii) paying to
such holder any amount in cash in lieu of any fraction  pursuant to Section 2(c)
of this Warrant.

            (g) Upon each  adjustment  of the  Exercise  Price  pursuant to this
Section 9, each Warrant  shall  thereupon  evidence  the right to purchase  that
number of  Warrant  Shares  (calculated  to the  nearest  hundredth  of a share)
obtained by  multiplying  the number of Warrant Shares  purchasable  immediately
prior to such  adjustment  upon exercise of the Warrant by the Exercise Price in
effect immediately prior to such adjustment and dividing the product so obtained
by  the  Exercise  Price  in  effect  immediately  after  such  adjustment.  The
adjustment  pursuant  to this  Section  9(g) to the  number  of  Warrant  Shares
purchasable  upon exercise of a Warrant shall be made each time an adjustment of
the Exercise Price is made pursuant to this Section 9.


Section 10. Lost, Stolen,  Mutilated or Destroyed  Warrants.  If this Warrant is
lost, stolen,  mutilated or destroyed, the Company shall promptly, on receipt of
an indemnification  undertaking or other form of security reasonably  acceptable
to the Company (or in the case of a mutilated Warrant, the Warrant), issue a new
Warrant  of like  denomination  and  tenor  as this  Warrant  so  lost,  stolen,
mutilated or destroyed.

Section 11. Notice.  All notices,  requests,  consents and other  communications
hereunder  shall be in writing,  shall be mailed (A) if within  United States by
first-class  registered or certified airmail, or nationally recognized overnight
express  courier,  postage  prepaid,  or by facsimile,  or (B) if delivered from

                                       11


outside the United States,  by International  Federal Express or facsimile,  and
shall be deemed given (i) if delivered by  first-class  registered  or certified
mail  domestic,  three (3) business  days after so mailed,  (ii) if delivered by
nationally recognized overnight carrier, one business day after so mailed, (iii)
if delivered by International  Federal  Express,  two (2) business days after so
mailed,  and (iv) if delivered  by  facsimile,  upon  electric  confirmation  of
receipt, and shall be delivered as addressed as follows:

                        If to the Company:
                              Iris International, Inc.
                              9172 Eton Avenue
                              Chatsworth, California 91311
                              Attn:  Mr. Cesar M. Garcia
                              Tel:  818-709-1244
                              Fax:  818-337-7400

                        with a copy to:
                              Sheppard Mullin Richter & Hampton, LLP
                              800 Anacapa Street
                              Santa Barbara, CA 93101
                              Attn:  Joseph E. Nida, Esq.
                              Tel:  (805) 879-1811
                              Fax: (805) 568-1955

                        If to the Transfer Agent:
                              Continental Stock and Transfer Co.
                              17 Battery Place
                              New York, New York 10004
                              Telephone: (212) 509-4000
                              Facsimile: (212) 616-7608
                              Attention: Richard Biscovich

If to a holder of this Warrant,  to it at the address and  facsimile  number set
forth on the signature  page to the Purchase  Agreement or at such other address
and facsimile as shall be delivered to the Company upon the issuance or transfer
of this Warrant.

Section  12.  Amendments.  This  Warrant  and any term  hereof  may be  amended,
changed,  waived,  discharged,  or  terminated  only by an instrument in writing
signed by the Company and holders of a majority of Warrant Shares represented by
all Warrants. Such amendment,  change, waiver, discharge or termination shall be
binding  on  the  Company  and  all  of  the  Warrant  holder's   assignees  and
transferees.  No waivers of any term,  condition or provision of this Warrant in
any one or more  instances  shall be deemed to be or  construed  as a further or
continuing waiver of any such term, condition or provision.

Section 13. Obligations Binding on Successors. This Warrant will be binding upon
any  entity  succeeding  to the  Company in one or a series of  transactions  by

                                       12


merger,  consolidation  or  acquisition  of  all  or  substantially  all  of the
Company's assets or other similar transactions and shall inure to the benefit of
the   holder   hereof  and  its   successors,   permitted   assigns   and  legal
representatives.

Section 14. Limitation on Exercise.

      (a) Notwithstanding  anything to the contrary contained herein, the number
of Warrant  Shares that may be acquired by the Holder upon any  exercise of this
Warrant  (or  otherwise  in  respect  hereof)  shall be  limited  to the  extent
necessary to insure that, following such exercise (or other issuance), the total
number of shares of Common Stock then beneficially  owned by such Holder and its
Affiliates  and any other  Persons  whose  beneficial  ownership of Common Stock
would be  aggregated  with the  Holder's  for  purposes of Section  13(d) of the
Exchange  Act,  does not  exceed  4.999%  of the  total  number  of  issued  and
outstanding  shares of Common  Stock  (including  for such purpose the shares of
Common  Stock  issuable  upon  such  exercise).  For such  purposes,  beneficial
ownership  shall be determined in accordance  with Section 13(d) of the Exchange
Act and the rules and regulations promulgated  thereunder.  By written notice to
the Company,  the Holder may waive the provisions of this Section 14(a), but any
waiver will not be effective until the 61st day after delivery of such notice.

      (b) Notwithstanding  anything to the contrary contained herein, the number
of Warrant  Shares that may be acquired by the Holder upon any  exercise of this
Warrant  (or  otherwise  in  respect  hereof)  shall be  limited  to the  extent
necessary to insure that, following such exercise (or other issuance), the total
number of shares of Common Stock then beneficially  owned by such Holder and its
Affiliates  and any other  Persons  whose  beneficial  ownership of Common Stock
would be  aggregated  with the  Holder's  for  purposes of Section  13(d) of the
Exchange  Act,  does not  exceed  9.999%  of the  total  number  of  issued  and
outstanding  shares of Common  Stock  (including  for such purpose the shares of
Common  Stock  issuable  upon  such  exercise).  For such  purposes,  beneficial
ownership  shall be determined in accordance  with Section 13(d) of the Exchange
Act and the rules and regulations promulgated  thereunder.  This restriction may
not be waived.

Section 15.  Governing  Law;  Consent to  Jurisdiction.  This  Warrant  shall be
governed by, and construed in accordance with, the internal laws of the State of
New York,  without  giving  effect to the  principles  of  conflicts of law. The
Company,  and  by its  acceptance  hereof,  the  holder  of  this  Warrant  each
irrevocably submits to the exclusive  jurisdiction of the courts of the State of
New York located in New York County and the United States District Court for the
Southern District of New York for the purpose of any suit, action, proceeding or
judgment  relating  to or  arising  out of this  Warrant  and  the  transactions
contemplated hereby. Service of process in connection with any such suit, action
or proceeding may be served on the Company and such holder anywhere in the world
by the same  methods  as are  specified  for the  giving of  notices  under this
Warrant.  The Company,  and by its acceptance hereof, the holder of this Warrant
each  irrevocably  consents  to the  jurisdiction  of any such court in any such
suit,  action  or  proceeding  and to the  laying  of venue in such  court.  The
Company,  and  by its  acceptance  hereof,  the  holder  of  this  Warrant  each
irrevocably waives any objection to the laying of venue of any such suit, action
or proceeding  brought in such courts and irrevocably  waives any claim that any
such suit, action or proceeding brought in any such court has been brought in an
inconvenient forum.

                                       13


Section  16.  Descriptive  Headings.  The  headings  of  this  Warrant  are  for
convenience  of  reference  only and  shall not limit or  otherwise  affect  the
meaning hereof.




                                       14





IN WITNESS  WHEREOF,  the Company has caused this Warrant to be duly executed as
of day and year first above written.

                                          COMPANY:

                                          IRIS INTERNATIONAL, INC.



                                          By:
                                             ---------------------------------
                                          Its:
                                             --------------------------------





                                       15





                              EXHIBIT A TO WARRANT

                             FORM OF EXERCISE NOTICE

The undersigned holder hereby exercises the right to purchase  ______________ of
the shares of Common Stock  ("Warrant  Shares") of Iris  International,  Inc., a
Delaware  corporation  (the  "Company"),  evidenced by the attached Warrant (the
"Warrant").  Capitalized  terms used herein and not otherwise defined shall have
the respective meanings set forth in the Warrant.  The undersigned holder hereby
represents and warrants to the Company as follows:

      (a) The  undersigned  holder is an "accredited  investor," as that term is
defined in Rule 501(a) of Regulation D under the Securities Act; and

      (b) The  undersigned  holder  has sold or will  sell the  shares of common
stock issuable  pursuant to this Notice pursuant to a registration  statement or
an exemption from registration under the Securities Act.

Date: _______________, ____

- ----------------------------------                   --------------------------
Name of Registered Holder                            Tax ID of Registered Holder
                                                     (if applicable)
By:
   ---------------------------------
Its:
    --------------------------------








                                 ACKNOWLEDGMENT

The  Company  hereby  acknowledges  this  Exercise  Notice  and  hereby  directs
Continental Stock and Transfer Co. to issue the above indicated number of shares
of Common Stock issuable upon exercise of the Warrant to the designated holder.

                                          IRIS INTERNATIONAL, INC.


                                          By:
                                             ---------------------------
                                          Its:
                                              --------------------------









                             EXHIBIT B TO WARRANT

                              FORM OF ASSIGNMENT

FOR  VALUE  RECEIVED,  the  undersigned  does  hereby  assign  and  transfer  to
________________,  Federal Identification No. __________,  a warrant to purchase
____________ shares of the common stock of IRIS INTERNATIONAL,  INC., a Delaware
corporation,  represented by warrant certificate no. _____, standing in the name
of the undersigned on the books of said corporation. The undersigned does hereby
irrevocably  constitute  and appoint  ______________,  attorney to transfer  the
warrants of said corporation, with full power of substitution in the premises.

Dated:  _________, 200_

                                          ------------------------------------
                                          By:
                                             ---------------------------------
                                          Its:
                                              --------------------------------