Exhibit 3.1

RESTATED CERTIFICATE OF INCORPORATION

BECKMAN COULTER, INC.

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FIRST: The name of the corporation is:

Beckman Coulter, Inc.

SECOND: The address of the corporation’s registered office in the State of Delaware is National Registered Agents, Inc., 160 Greentree Drive, Suite 101, in the City of Dover, County of Kent, Delaware 19904. The name of the corporation’s registered agent at such address is National Registered Agents, Inc.

THIRD: The purpose of the corporation is to engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of the State of Delaware.

FOURTH: The total number of shares of capital stock which the corporation shall have authority to issue is five hundred (500) shares of Common Stock with $.01 par value. Except as otherwise provided by law, the Common Stock shall have the exclusive right to vote for the election of directors and for all other purposes. Each share of Common Stock shall have one vote, and the Common Stock shall vote together as a single class.

FIFTH: The corporation is to have perpetual existence.

SIXTH: To the fullest extent permitted by law, the private property of the stockholders shall not be subject to the payment of the corporation debts to any extent whatever.

SEVENTH: The following provisions are inserted for the management of the business and for the conduct of the affairs of the corporation and for defining and regulating the powers of the corporation and its directors and stockholders and are in the furtherance and not in limitation of the powers conferred upon the corporation and its directors by statute:

(a) The business and affairs of the corporation shall be managed by or under the direction of the Board of Directors.

(b) The by-laws of the corporation may fix and alter, or provide the manner for fixing and altering, the number of directors constituting the whole Board. In case of any vacancy on the Board of Directors or any increase in the number of directors constituting the whole Board, the vacancies shall be filled by the directors or by the stockholders at the time having voting power, as may be prescribed in the by-laws. Directors need not be stockholders of the corporation, and the election of directors need not be by ballot unless and to the extent that

the by-laws so provide. Any one or more directors may be removed, with or without cause, by the vote or written consent of the holders of a majority of the issued and outstanding shares of capital stock of the corporation entitled to be voted at an election of directors.

EIGHTH: Meetings of stockholders may be held outside the State of Delaware, if the by-laws so provide. The books of the corporation may be kept outside of the State of Delaware at such place or places as may be designated from time to time by the Board of Directors or in the by-laws of the corporation.

NINTH:

(a) Each person who was or is made a party or is threatened to be made a party to or is involved in any action, suit or proceeding, whether civil, criminal, administrative or investigative (hereinafter a “proceeding”), by reason of the fact that he or she, or a person of whom he or she is the legal representative, is or was a director or officer of the corporation or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation or of a partnership, joint venture, trust or other enterprise, including service with respect to employee benefit plans, whether the basis of such proceeding is alleged action in an official capacity as a director, officer, employee or agent or in any other capacity while serving as a director, officer, employee or agent, shall be indemnified and held harmless by the corporation to the fullest extent authorized by the General Corporation Law of the State of Delaware, as the same exists or may hereafter be amended (but, in the case of any such amendment, to the fullest extent permitted by law, only to the extent that such amendment permits the corporation to provide broader indemnification rights than said law permitted the corporation to provide prior to such amendment), against all expense, liability and loss (including attorneys’ fees, judgments, fines, amounts paid or to be paid in settlement, and excise taxes or penalties arising under the Employee Retirement Income Security Act of 1974) reasonably incurred or suffered by such person in connection therewith, and such indemnification shall continue as to a person who has ceased to be a director, officer, employee or agent and shall inure to the benefit of his or her heirs, executors and administrators; provided, however, that, except as provided in paragraph (b) hereof, the corporation shall indemnify any such person seeking indemnification in connection with a proceeding (or part thereof) initiated by such person only if such proceeding (or part thereof) was authorized by the Board. The right to indemnification conferred in this Article Ninth shall be a contract right and shall include the right to be paid by the corporation the expenses incurred in defending any such proceeding in advance of its final disposition; provided, however, that, if the General Corporation Law of the State of Delaware requires, the payment of such expenses incurred by a director or officer in his or her capacity as a director or officer (and not in any other capacity in which service was or is rendered by such person while a director or officer, including, without limitation, service to an employee benefit plan) in advance of the final disposition of a proceeding, shall be made only upon delivery to the corporation of an undertaking, by or on behalf of such director or officer, to repay all amounts so advanced if it shall ultimately be determined that such director or officer is not entitled to be indemnified under this Article Ninth or otherwise. The corporation may, by action of the Board, provide indemnification to employees and agents of the corporation with the same scope and effect as the foregoing indemnification of directors and officers.

(b) If a claim under this Article Ninth is not paid in full by the corporation within thirty (30) days after a written claim has been received by the corporation, the claimant may at any time thereafter bring suit against the corporation to recover the unpaid amount of the claim and, if successful in whole or in part, the claimant shall be entitled to be paid also the expense of prosecuting such claim. It shall be a defense to any such action (other than an action brought to enforce a claim for expenses incurred in defending any proceeding in advance of its final disposition where the required undertaking, if any is required, has been tendered to the corporation) that the claimant has not met the standards of conduct which make it permissible under the General Corporation Law of the State of Delaware for the corporation to indemnify the claimant for the amount claimed, but the burden of proving such defense shall be on the corporation. Neither the failure of the corporation (including its Board, independent legal counsel, or its stockholders) to have made a determination prior to the commencement of such action that indemnification of the claimant is proper in the circumstances because he or she has met the applicable standard of conduct set forth in the General Corporation Law of the State of Delaware, nor an actual determination by the corporation (including its Board, independent legal counsel, or its stockholders) that the claimant has not met such applicable standard of conduct, shall be a defense to the action or create a presumption that the claimant has not met the applicable standard of conduct.

(c) No provision of this Article Ninth is intended to be construed as limiting, prohibiting, denying or abrogating any of the general or specific powers or rights conferred by the General Corporation Law of the State of Delaware upon the corporation to furnish, or upon any court to award, such indemnification, or indemnification as otherwise authorized pursuant to the General Corporation Law of the State of Delaware or any other law now or hereafter in effect. The rights conferred upon indemnitees in this Article Ninth shall not be exclusive of any other right which any person may have or hereafter acquire under any statute, provision of the Certificate of Incorporation, by-law, agreement, vote of stockholders or disinterested directors or otherwise. The rights conferred upon indemnitees in this Article Ninth shall be contract rights. Any amendment, alteration or repeal of this Article Ninth that adversely affects any right of an indemnitee or its successors shall be prospective only and shall not limit or eliminate any such right with respect to any proceeding involving any occurrence or alleged occurrence of any action or omission to act that took place prior to such amendment or repeal.

(d) The Board of Directors of the corporation may, in its discretion, authorize the corporation to purchase and maintain insurance for itself and on behalf of any person who is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any expense, liability or loss asserted against it or such person or incurred by such person in any such capacity, or arising out of such person’s status as such, whether or not the corporation would have the power to indemnify such person against such liability under the foregoing paragraph of this Article Ninth or under the General Corporation Law of the State of Delaware.

TENTH: To the fullest extent permitted by Delaware law, a director of the corporation shall not be personally liable to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, except to the extent such exemption from liability or limitation thereof is not permitted under the General Corporation Law of the State of Delaware. If the General Corporation Law of the State of Delaware is amended to authorize corporate action further eliminating or limiting the personal liability of directors, then the liability of a director of the corporation shall be eliminated or limited to the fullest extent permitted by the Delaware General Corporation Law, as so amended, automatically without the necessity of any action by the corporation or any person. Any repeal or modification of this provision shall not adversely affect any right or protection of a director of the corporation existing at the time of such repeal or modification.

ELEVENTH: The corporation reserves the right to amend, alter, change or repeal any provisions contained in this Certificate of Incorporation, in the manner now or hereafter prescribed by law, and all rights conferred upon stockholders, directors or any other persons whomsoever by and pursuant to this Certificate of Incorporation in its present form or as hereafter amended are granted subject to this reservation.

TWELFTH: Section 203 of the General Corporation Law of the State of Delaware shall not apply to the corporation.

BECKMAN COULTER INC 8-K