<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