EXHIBIT 10.2

EXECUTION

FOURTH AMENDMENT TO SECOND AMENDED
AND RESTATED CREDIT AGREEMENT

This FOURTH AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT (this "Fourth Amendment") is entered into as of June 30, 2015 and made by and among HARVARD BIOSCIENCE, INC. (the "Borrower"), BANK OF AMERICA N.A., as Administrative Agent ("Agent") L/C Issuer and Lender, and BROWN BROTHERS HARRIMAN & CO. ("BBH").

Background

The Borrower, the Agent and BBH entered into a Second Amended and Restated Credit Agreement dated as of March 29, 2013, as amended by First Amendment to Second Amended and Restated Credit Agreement dated May 30, 2013 with an effective date as of April 30, 2013, as amended by Second Amendment to Second Amended and Restated Credit Agreement and Waiver dated October 31, 2013, as amended by Third Amendment to Second Amended and Restated Credit Agreement dated April 24, 2015 (collectively, the "Original Credit Agreement"). Capitalized terms used herein but not defined herein will have the meaning given such term in the Original Credit Agreement. The Borrower has requested that the Agent and the Lenders amend the definition of "Change of Control" and to amend the Minimum Fixed Charge Coverage Ratio. The Original Credit Agreement, as amended by this Fourth Amendment, as further amended, modified or supplemented from time to time, is referred to herein as the "Credit Agreement"

NOW, THEREFORE, in consideration of the promises and the agreements, provisions and covenants herein contained, the Borrower, the Agent and the Lenders hereby agree as follows:

1. Amendment. Subject to the terms and conditions herein contained and in reliance

on the representations and warranties of the Borrower herein contained, effective upon satisfaction of the conditions precedent contained in section 3 below, the following amendments shall be incorporated into the Original Credit Agreement:

(A) Section 1.01, "Defined Terms" of the Original Credit Agreement is hereby

amended by deleting the text subsection (b) of the definition of "Change of Control” in its entirety and replacing it with the following in lieu thereof:

"(b) during any period of 12 consecutive months, a majority of the members of the board of directors or other equivalent governing body of the Borrower cease to be composed of individuals (i) who were members of that board or equivalent governing body on the first day of such period, (ii) whose election or nomination to that board or equivalent governing body was approved by individuals referred to in clause (i) above constituting at the time of such election or nomination at least a majority of that board or equivalent governing body or (iii) whose election or nomination to that board or other equivalent governing body was approved by individuals referred to in clauses (i) and (ii) above constituting at the time of such election or nomination at least a majority of that board or equivalent governing body;"

(B)              Section 7.11(b), "Financial Covenants; Minimum Fixed Charge Coverage Ratio" of the Original Credit Agreement is hereby amended by deleting the text therein contained in its entirety and replacing it with the following in lieu thereof:

"Minimum Fixed Charge Coverage Ratio. As of the last day of any fiscal quarter, the ratio of (i) consolidated Adjusted EBITDA of the Borrower and its Subsidiaries (for the avoidance of doubt, excluding HART) for the four-quarter period ending on the last day of such fiscal quarter, minus, (x) aggregate cash capital expenditures, minus (y) cash taxes paid, each of (x) and (y) for the four-quarter period ending on the last day such fiscal quarter, to (ii) the current portion of Funded Debt other than the Total Revolving Credit Outstandings, as of the last day of such fiscal quarter, plus (without duplication) Interest Expense during such trailing four (4) fiscal quarters, to be less than 1.10:1.00 for each of the trailing four fiscal quarters ending June 30, 2015 and September 30, 2015, to be less than 1.25:1.00 for each of the trailing four fiscal quarters ending December 31, 2015 and March 31, 2016 and to be less than 1.50:1.00 for each of the trailing four quarters thereafter."

(C)              Section 11.17 "Electronic Execution of Assignments and Certain Other

Documents" is hereby deleted and replaced with "11.17 Reserved."

(D)             Section 11.21 "Electronic Execution of Assignments and Certain Other Documents" is hereby amended to delete the period after the last word thereof, "it", and to add the following after such word:

"provided, further, without limiting the foregoing, upon the request of the Administrative Agent, any electronic signature shall be promptly followed by such manually executed counterparts."

2. Conditions Precedent. The provisions of this Fourth Amendment shall be

effective as of the date on which all of the following conditions shall be satisfied:

(a)                the Borrower shall have delivered to the Agent a fully executed counterpart of this Fourth Amendment;

(b)               the Borrower shall have paid all fees, costs and expenses owing to the Agent and its counsel on or before the date hereof;

(c)                the Borrower shall have paid to the Agent for the pro rata account of the Lenders an amendment fee in the aggregate amount of $32,000 and

(d)               the Lenders shall have indicated their consent and agreement by executing this Fourth Amendment.

3. Miscellaneous.

(a) Ratification. The terms and provisions set forth in this Fourth

Amendment shall modify and supersede all inconsistent terms and provisions set forth in the Original Credit Agreement and except as expressly modified and superseded by this Fourth Amendment, the terms and provisions of the Original Credit Agreement and the other Loan Documents are ratified and confirmed and shall continue in full force and effect. The Borrower and the Agent agree that the Original Credit Agreement as amended hereby and the other Loan Documents shall continue to be legal, valid, binding and enforceable in accordance with their respective terms. For all matters arising prior to the effective date of this Fourth Amendment, the Original Credit Agreement (as unmodified by this Amendment) shall control. The Borrower hereby acknowledges that, as of the date hereof, the security interests and liens granted to the Agent and the Lender under the Credit Agreement and the other Loan Documents are in full force and effect, are properly perfected and are enforceable in accordance with the terms of the Credit Agreement and the other Loan Documents.

(b) Representations and Warranties. The Borrower hereby represents

and warrants to the Agent and the Lenders that the representations and warranties set forth in the Loan Documents, after giving effect to this Fourth Amendment, are true and correct in all material respects on and as of the date hereof, with the same effect as though made on and as of such date except with respect to any representations and warranties limited by their terms to a specific date. The Borrower further represents and warrants to the Agent and the Lenders that the execution, delivery and performance by the Borrower of this consent letter (i) are within the Borrower's power and authority; (ii) have been duly authorized by all necessary corporate and shareholder action; (iii) are not in contravention of any provision of the Borrower's certificate or articles of incorporation or bylaws or other organizational documents; (iv) do not violate any law or regulation, or any order or decree of any Governmental Authority; (v) do not conflict with or result in the breach or termination of, constitute a default under or accelerate any performance required by, any indenture, mortgage, deed of trust, lease, agreement or other instrument to which the Borrower is a party or by which the Borrower or any of its property is bound; (vi) do not result in the creation or imposition of any Lien upon any of the property of the Borrower other than in favor of Agent; (vii) do not require the consent or approval of any Governmental Authority. All representations and warranties made in this Fourth Amendment shall survive the execution and delivery of this Fourth Amendment, and no investigation by the Agent shall affect the representations and warranties or the right of the Agent to rely upon them.

(e) Reference to Agreement. Each of the Loan Documents, including

the Original Credit Agreement and any and all other agreements, documents, or instruments now or hereafter executed and delivered pursuant to the terms hereof or pursuant to the terms of the Original Credit Agreement as amended hereby, are hereby amended so that any reference in such Loan Documents to the Original Credit Agreement shall mean a reference to the Original Credit Agreement as amended hereby.

(d)               Expenses of the Agent. As provided in the Credit Agreement, the Borrower agrees to pay all reasonable costs and expenses incurred by the Agent in connection with the preparation, negotiation, and execution of this Fourth Amendment, including without limitation, the reasonable costs and fees of the Agent's legal counsel.

(e)                Severability. Any provision of this Fourth Amendment held by a court of competent jurisdiction to be invalid or unenforceable shall not impair or invalidate the remainder of this Fourth Amendment and the effect thereof shall be confined to the provision so held to be invalid or unenforceable.

(f)                Applicable Law. This Amendment shall be governed by and construed in accordance with the laws of The Commonwealth of Massachusetts and the applicable laws of the United States of America.

(g)               Successors and Assigns. This Fourth Amendment is binding upon and shall inure to the benefit of the Agent, the Lender and the Borrower, and their respective successors and assigns, except the Borrower may not assign or transfer any of its rights or obligations hereunder without the prior written consent of the Agent.

(h)               Counterparts. This Fourth Amendment may be executed in one or more counterparts and on facsimile counterparts, each of which when so executed shall be deemed to be an original, but all of which when taken together shall constitute one and the same agreement.

(i)                 Effect of Waiver. No consent or waiver, express or implied, by the Agent to or for any breach of or deviation from any covenant, condition or duty by the Borrower shall be deemed a consent or waiver to or of any other breach of the same or any other covenant, condition or duty.

(j)                 Headings. The headings, captions, and arrangements used in this Fourth Amendment are for convenience only and shall not affect the interpretation of this Fourth Amendment.

(k)               FATCA. For purposes of determining withholding Taxes imposed under FATCA, from and after the effective date of the Amendment, the Borrower and the Administrative Agent shall treat (and the Lenders hereby authorize the Administrative Agent to treat) the Loans as not qualifying as a "grandfathered obligation" within the meaning of Treasury Regulation Section 1.1471-2(b)(2)(i)).

(l) ENTIRE AGREEMENT. THIS FOURTH AMENDMENT EMBODIES THE ENTIRE AGREEMENT AMONG THE PARTIES HERETO WITH RESPECT TO THE SUBJECT MATTER THEREOF, AND SUPERSEDES ANY AND ALL PRIOR REPRESENTATIONS AND UNDERSTANDINGS, WHETHER WRITTEN OR ORAL, RELATING TO THIS AMENDMENT. THERE ARE NO ORAL AGREEMENTS AMONG THE PARTIES HERETO WITH RESPECT TO THE SUBJECT MATTER HEREOF.

[Remainder of Page Intentionally Left Blank]

IN WITNESS WHEREOF, the parties hereto have executed this Fourth Amendment as of the date first above written.