Exhibit 23.01

Consent  of  Independent  Auditors


We  consent  to  the  incorporation by reference in the Registration Statement
(Form S-8) pertaining to the 1997 Bioanalytical Systems, Inc. Outside Director
Stock Option Plan of our report dated October 31, 1997 (except for Note 10, as
to  which  the  date  is  November  21, 1997) with respect to the consolidated
financial  statements  of  Bioanalytical  Systems,  Inc.  included  in  its
Registration  Statement  on  Form  S-1 (No. 333-36429) dated November 24, 1997
filed  with  the  Securities  and  Exchange  Commission.


/s/  Ernst  &  Young  LLP






Indianapolis,  Indiana
June  1,  1998