Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  IDEX CORP /DE/
 2. Date of Event Requiring Statement (Month/Day/Year)
02/25/2011		 3. Issuer Name and Ticker or Trading Symbol
MICROFLUIDICS INTERNATIONAL CORP [MFLU.OB]
(Last)
(First)
(Middle)
1925 WEST FIELD COURT, SUITE 200		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

LAKE FOREST, IL 60045		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 6,940,731
I
See Footnotes (1) (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
IDEX CORP /DE/
1925 WEST FIELD COURT, SUITE 200
LAKE FOREST, IL 60045		     X    

Signatures

IDEX Corporation, by /s/ Frank J. Notaro, Vice President and General Counsel 03/01/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) IDEX Corporation ("IDEX"), Nano Merger Sub, Inc., a wholly owned subsidiary of IDEX ("Purchaser"), and Microfluidics International Corporation (the "Issuer"), entered into an Agreement and Plan of Merger, dated as of January 10, 2011, pursuant to which Purchaser conducted a cash tender offer (the "Offer") to purchase all outstanding shares of common stock, par value $0.01 per share, of the Issuer (the "Shares"), at a price of $1.35 per Share, net to the seller in cash, and subject to the terms and conditions set forth in the Offer to Purchase, dated January 25, 2011, as amended, attached as an exhibit to the Tender Offer Statement on Schedule TO, initially filed by IDEX and Purchaser with the Securities and Exchange Commission on January 25, 2011, as amended.
(2) The Offer expired at 12:00 midnight, New York City time, on February 24, 2011. An aggregate of 6,940,731 Shares were validly tendered and not withdrawn in the Offer (including certain Shares tendered under the Offer's guaranteed delivery procedures), representing approximately 66.54% of the Issuer's outstanding Shares. On February 25, 2011, Purchaser accepted for payment all validly tendered and not withdrawn Shares. Purchaser is the owner of the Shares purchased in the Offer. IDEX may be deemed to be the indirect beneficial owner of the Shares held by Purchaser.

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