EXHIBIT 10.9

       THIS NOTE HAS BEEN ACQUIRED FOR INVESTMENT PURPOSES ONLY AND MAY
  NOT BE TRANSFERRED UNTIL (i) A REGISTRATION STATEMENT UNDER THE
  SECURITIES ACT OF 1933, AS AMENDED THE "ACT" SHALL HAVE BECOME EFFECTIVE
  WITH RESPECT THERETO OR (ii) RECEIPT BY THE ISSUER OF AN OPINION OF
  COUNSEL REASONABLY SATISFACTORY TO THE ISSUER TO THE EFFECT THAT
  REGISTRATION UNDER THE ACT IS NOT REQUIRED IN CONNECTION WITH SUCH
  PROPOSED TRANSFER NOR IS IN VIOLATION OF ANY APPLICABLE STATE SECURITIES
  LAWS. THIS LEGEND SHALL BE ENDORSED UPON ANY NOTE ISSUED IN EXCHANGE FOR
  THIS NOTE.

                            SEPRAGEN CORPORATION

  No. 1                                                            $550,000
  Dated: August 18, 1998

                     CONVERTIBLE SECURED PROMISSORY NOTE

       SEPRAGEN CORPORATION, a California corporation (the "Company"), for
  value received, hereby promises to pay to K. Charles Janac or registered
  assigns (the "Payee") on December 15, 1998 (the "Maturity Date") at the
  offices of the Company, 30689 Huntwood Avenue, Hayward, California
  94544, the principal amount of Five Hundred Fifty Thousand Dollars
  ($550,000), including interest at the rate of nine point seventy-five
  percent (9.75%) per annum accrued through the Maturity Date, in such
  coin or currency of the United States of America as at the time of
  payment shall be legal tender for the payment of public and private
  debts, unless converted earlier into Class A Common Stock of the
  Company.

       This Note is issued pursuant to a Subscription Agreement dated as
  of August 18, 1998 between the Company and the Payee (the "Subscription
  Agreement"), a copy of which agreement is available for inspection at
  the Company's principal office. Notwithstanding any provision to the
  contrary contained herein, this Note is subject and entitled to certain
  terms, conditions, covenants and agreements contained in the Subscrip-
  tion Agreement. Any transferee or transferees of the Note, by their
  acceptance hereof, assume the obligations of the Payee in the Subscrip-
  tion Agreement with respect to the conditions and procedures for
  transfer of the Note. Reference to the Subscription Agreement shall in
  no way impair the absolute and unconditional obligation of the Company
  to pay both principal and interest hereon as provided herein.

       On or before the Maturity Date, the Payee may elect to receive
  payment of the principal amount of this Note or any part thereof and
  accrued interest (the "Conversion Amount") in the form of Class A Common
  Stock (the "Equity Conversion"). In an Equity Conversion, the Payee
  shall receive such number of fully paid and non-assessable shares of the
  Class A Common Stock as is obtained by dividing the Conversion Amount by
  $0.46875 (the "Conversion Price").

       Upon the conversion of all principal and interest hereunder, Payee
  shall have no further rights under this Note except to surrender the
  same for a certificate or certificates representing the securities into
  which this Note shall have automatically converted. As soon as
  practicable thereafter, the Company shall, at its expense, cause to be
  issued in the name of the Payee, a certificate or certificates for the
  number of shares of the securities to which Payee shall be entitled to
  receive (bearing such legends as may be required by applicable
  securities laws). No fractional shares shall be issued on conversion of
  this Note; if any fractional shares would result from such conversion,
  the Company shall pay the cash value thereof to Payee based on the
  Equity Conversion Price.

       1.   Prepayment. The principal amount of this Note may be prepaid
  by the Company in whole or in part, without penalty, at any time, unless
  the Holder elects an Equity Conversion.

       2.   Covenants of Company. The Company covenants and agrees that,
  so long as this Note shall be outstanding, it will:

            (a)  Do or cause to be done all things reasonably necessary to
  preserve and keep in full force and effect its corporate existence,
  rights and franchises and comply with all laws applicable to the
  Company, except where the failure. to comply would not have a material
  adverse effect on the Company.

            (b)  At all times reasonably maintain, preserve, protect and
  keep its property used or useful in the conduct of its business in good
  repair, working order and condition, excluding normal wear and tear and
  Act of God, and from time to time make all needful and proper repairs,
  renewals, replacements, betterments and improvements thereto as shall be
  reasonably required in the conduct of its business.

            (c)  To the extent necessary for the operation of its
  business, keep adequately insured by all financially sound reputable
  insurers, all property of a character usually insured by similar
  corporations and carry such other insurance as is usually carried by
  similar corporations.

            (d)  At all times keep true and correct books, records and
  accounts.

       3.   Events of Default.

            (a)  If one or more of the events listed in this Section 3,
  herein called events of default, shall happen and be continuing, the
  holder of this Note may send a Notice of Default to Company. Company
  shall have thirty (30) days from the date of receipt of the Notice of
  Default to cure the default; provided however, if an event of default
  was caused by an Act of God, Company shall have sixty (60) days from the
  date of receipt of the Notice of Default to cure the default (the "Cure
  Period"). If Company fails to -completely cure the default during the
  Cure Period, this Note shall become and be due and payable upon written
  demand made by the holder hereof.

                 (1)  Default in the payment of the principal and accrued
  interest on this Note or any of the Notes issued pursuant to 5(a) hereof
  when and as the same shall become due and payable, whether by
  acceleration or otherwise.

                 (2)  Application for, or consent to, the appointment of a
  receiver, trustee, or liquidator of the Company or of its property.

                 (3)  General assignment by the Company for the benefit of
  creditors.

                 (4)  Filing by the Company of a voluntary petition in
  bankruptcy or a petition or an answer seeking reorganization, or an
  arrangement with creditors or the failure by the Company generally to
  pay debts, as they become due.

                 (5)  Entering against the Company of a court order
  approving a petition filed against it under the Federal bankruptcy laws,
  which order shall not have been vacated or set aside or otherwise
  terminated within sixty (60) days.

                 (6)  Any representation or warranty of the Company
  contained in the Subscription Agreement, Security Agreement, Form UCC-1
  related to the obligations hereunder, Patent Mortgage related to the
  obligations hereunder or any related documents (collectively, the "Loan
  Documents") is false or misleading in any material respect on the date
  made.

                 (7)  Default by the Company in any obligation under the
  Loan Documents the effect of which is reasonably likely to reduce the
  Company's ability to repay principal or interest under the Note when
  due.

                 (8)  The Company voluntarily or involuntarily dissolves
  or is dissolved.

                 (9)  The Company is enjoined, restrained, or in any way
  prevented by the order of any court or any administrative or regulatory
  agency from conducting all or any material part of its business affairs
  the effect of which is reasonably likely to reduce the Company's ability
  to repay principal or interest under the Note when due.

                 (10) The violation by the Company of any material order,
  regulation, writ, injunction, or decrees of any government, governmental
  instrumentality or court, domestic or foreign, the effect of which is
  reasonably likely to reduce the Company's ability to repay principal or
  interest under the Note when due.

            (b)  The Company agrees that notice of the occurrence of any
  of event of default will be promptly given to the holder at his or her
  registered address by certified mail.

            (c)  In case any one or more of the events of default
  specified above shall happen and be continuing, the holder of this. Note
  may proceed to protect and enforce his rights by suit in the specific
  performance of any covenant or agreement contained in this Note or in
  aid of the exercise of any power granted in this Note or may proceed to
  enforce the payment of this Note or to enforce any other legal or
  equitable rights as such holder.

       4.   Amendments. This Note may only be amended with the written
  consent of the holder.

       5.   Miscellaneous.

            (a)  This Note has been issued by the Company pursuant to
  authorization of the Board of Directors of the Company.

            (b)  The Company may consider and treat the person in whose
  name this Note shall be registered as the absolute owner thereof for all
  purposes whatsoever (whether or not this Note shall be overdue) and the
  Company shall not be affected by any notice to the contrary. The
  registered owner of this Note shall have the right to transfer it by
  assignment (subject to the limitations on transfer contained in the
  Subscription Agreement) and the transferee thereof shall upon his
  registration as owner of this Note, become vested with all the powers
  and rights of the transferor. Registration of any new owner shall take
  place upon presentation of this Note to the Company at its offices,
  30689 Huntwood Avenue, Hayward, California 94544, together with a duly
  authenticated assignment. In case of transfer by operation of law, the
  transferee agrees to notify the Company of such transfer and of his
  address and to submit appropriate evidence regarding the transfer so
  that this Note may be registered in the name of the transferee. This
  Note is transferable only on the books of the Company by the holder
  hereof, in person or by attorney, on the surrender hereof, duly
  endorsed. Communications sent to any registered owner shall be effective
  as against all holders or transferees of the Note not registered at the
  time of sending the Communication.

            (c)  Payments of interest shall be made as specified above to
  the registered owner of this Note. Payment of principal and interest
  shall be made to the registered owner of this Note upon presentation of
  this Note upon or after maturity.

            (d)  This Note shall be construed and enforced in accordance
  with the laws of the State of California.

  IN WITNESS WHEREOF the Company has caused this Note to be signed in its
  name by its President.

  SEPRAGEN CORPORATION

  By: /s/ Vinit Saxena
  Title: President