<ARTICLE> 5 <LEGEND> 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> 1000 <PERIOD-TYPE> 3-MOS 6-MOS <FISCAL-YEAR-END> SEP-30-1999 SEP-30-1999 <PERIOD-START> JAN-01-1999 OCT-01-1998 <PERIOD-END> MAR-31-1999 MAR-31-1999 <CASH> 854 854 <SECURITIES> 0 0 <RECEIVABLES> 3,223 3,223 <ALLOWANCES> 0 0 <INVENTORY> 1,927 1,927 <CURRENT-ASSETS> 6,289 6,289 <PP&E> 20,815 20,815 <DEPRECIATION> 4,464 4,464 <TOTAL-ASSETS> 23,950 23,950 <CURRENT-LIABILITIES> 4,555 4,555 <BONDS> 0 0 <PREFERRED-MANDATORY> 0 0 <PREFERRED> 0 0 <COMMON> 999 999 <OTHER-SE> 16,042 16,042 <TOTAL-LIABILITY-AND-EQUITY> 23,950 23,950 <SALES> 2,329 4,624 <TOTAL-REVENUES> 5,057 9,655 <CGS> 876 1,823 <TOTAL-COSTS> 2,520 5,022 <OTHER-EXPENSES> 2,197 4,275 <LOSS-PROVISION> 0 0 <INTEREST-EXPENSE> 24 65 <INCOME-PRETAX> 354 344 <INCOME-TAX> 154 150 <INCOME-CONTINUING> 200 194 <DISCONTINUED> 0 0 <EXTRAORDINARY> 0 0 <CHANGES> 0 0 <NET-INCOME> 200 194 <EPS-PRIMARY> .04 .04 <EPS-DILUTED> .04 .04