<ARTICLE> 5 <LEGEND> Financial Data Schedule This schedule contains summary financial information extracted from the Bioanalytical Systems, Inc. consolidated financial statements contained in the company's annual report on Form 10-K and is qualified in its entirety by reference to such financial statements. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> SEP-30-1999 <PERIOD-START> OCT-01-1998 <PERIOD-END> DEC-31-1998 <CASH> 437 <SECURITIES> 0 <RECEIVABLES> 2,862 <ALLOWANCES> 0 <INVENTORY> 1,903 <CURRENT-ASSETS> 5,443 <PP&E> 19,575 <DEPRECIATION> 4,225 <TOTAL-ASSETS> 22,133 <CURRENT-LIABILITIES> 3,042 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 998 <OTHER-SE> 15,840 <TOTAL-LIABILITY-AND-EQUITY> 22,133 <SALES> 2,295 <TOTAL-REVENUES> 4,598 <CGS> 947 <TOTAL-COSTS> 2,502 <OTHER-EXPENSES> 2,078 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 41 <INCOME-PRETAX> (10) <INCOME-TAX> (4) <INCOME-CONTINUING> (6) <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> (6) <EPS-PRIMARY> .00 <EPS-DILUTED> .00