<DOCUMENT>
<TYPE>EX-24.TXT
<SEQUENCE>2
<FILENAME>ex24landis.txt
<DESCRIPTION>JOHN LANDIS POWER OF ATTORNEY
<TEXT>
LIMITED POWER OF ATTORNEY FOR
SECTION 16 REPORTING OBLIGATIONS

Know all by these presents, that the undersigned hereby makes,
constitutes and appoints each of Michael R. Cox, Richard M.
Shepperd and Lina Reeves-Kerner, each acting individually, as the
undersigned's true and lawful attorney-in-fact, with full power
and authority as hereinafter described on behalf of and in the
name, place and stead of the undersigned to:

(1) prepare, execute, acknowledge, deliver and file Forms 3, 4,
and 5 (including any amendments thereto) with respect to the
securities of Bioanalytical Systems, Inc., an Indiana corporation
(the "Company"), with the United States Securities and Exchange
Commission, any national securities exchanges and the Company, as
considered necessary or advisable under Section 16(a) of the
Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, as amended from time to time (the
"Exchange Act");

(2) seek or obtain, as the undersigned's representative and on
the undersigned's behalf, information on transactions in the
Company's securities from any third party, including brokers,
employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any such
information to each of the undersigned's attorneys-in-fact
appointed by this Limited Power of Attorney and approves and
ratifies any such release of information; and

(3) perform any and all other acts which in the discretion of
such attorney-in-fact are necessary or desirable for and on
behalf of the undersigned in connection with the foregoing.

The undersigned acknowledges that:

(1) this Limited Power of Attorney authorizes, but does not
require, each such attorney-in-fact to act in their discretion on
information provided to such attorney-in-fact without independent
verification of such information;

(2) any documents prepared and/or executed by any such attorney-
in-fact on behalf of the undersigned pursuant to this Limited
Power of Attorney will be in such form and will contain such
information and disclosure as such attorney-in-fact, in his or
her discretion, deems necessary or desirable;

(3) neither the Company nor any such attorney-in-fact assumes (i)
any liability for the undersigned's responsibility to comply with
the requirements of the Exchange Act, (ii) any liability of the
undersigned for any failure to comply with such requirements, or
(iii) any obligation or liability of the undersigned for profit
disgorgement under Section 16(b) of the Exchange Act; and

(4) this Limited Power of Attorney does not relieve the
undersigned from responsibility for compliance with the
undersigned's obligations under the Exchange Act, including
without limitation the reporting requirements under Section 16 of
the Exchange Act.

The undersigned hereby gives and grants each of the foregoing
attorneys-in-fact full power and authority to do and perform all
and every act and thing whatsoever requisite, necessary or
appropriate to be done in and about the foregoing matters as
fully to all intents and purposes as the undersigned might or
could do if present, hereby ratifying all that each such
attorney-in-fact of, for and on behalf of the undersigned, shall
lawfully do or cause to be done by virtue of this Limited Power
of Attorney.

This Limited Power of Attorney shall remain in full force and
effect until revoked by the undersigned in a signed writing
delivered to each such attorney-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Limited Power
of Attorney to be executed as of this 20th day of November, 2009.

/s/ JOHN B. LANDIS
John B. Landis



STATE OF INDIANA)
		    )  SS:
COUNTY OF	MARION)

Subscribed to and sworn before me, a Notary Public, in and for
said County and State, this 20th day of November, 2009.

/s/ KELLY A. DORIA
Signature

Kelly A. Doria
Printed Notary Public


My Commission Expires: March 21, 2015
County of Residence: Hamilton




I/2405481.1


</TEXT>
</DOCUMENT>
