SEC Form 3

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 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* IDEX CORP /DE/ (Last) (First) (Middle) 1925 WEST FIELD COURT, SUITE 200 (Street) LAKE FOREST IL 60045 (City) (State) (Zip)	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 ]
		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 of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

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)

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: 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

Explanation of Responses:

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.

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