<ARTICLE> 5
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-START>                             OCT-01-1998
<PERIOD-END>                               MAR-31-1999
<EXCHANGE-RATE>                                      1
<CASH>                                          16,056
<SECURITIES>                                         0
<RECEIVABLES>                                   14,855
<ALLOWANCES>                                     1,053
<INVENTORY>                                      9,479
<CURRENT-ASSETS>                                43,533
<PP&E>                                          39,068
<DEPRECIATION>                                  25,980
<TOTAL-ASSETS>                                  70,524
<CURRENT-LIABILITIES>                           20,205
<BONDS>                                          6,000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           197
<OTHER-SE>                                      40,150
<TOTAL-LIABILITY-AND-EQUITY>                    70,524
<SALES>                                         45,268
<TOTAL-REVENUES>                                45,268
<CGS>                                           18,558
<TOTAL-COSTS>                                   18,558
<OTHER-EXPENSES>                                 5,078
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                (74)
<INCOME-PRETAX>                                  8,528
<INCOME-TAX>                                     2,761
<INCOME-CONTINUING>                              5,767
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     5,767
<EPS-PRIMARY>                                     0.75
<EPS-DILUTED>                                     0.74