<ARTICLE>           5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THERMOQUEST
CORPORATION'S QUARTERLY REPORT ON FORM 10-Q FOR THE PERIOD ENDED JULY 3, 1999
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>        1,000

                              
<PERIOD-TYPE>                                 6-MOS
<FISCAL-YEAR-END>                             JAN-01-2000
<PERIOD-END>                                  JUL-03-1999
<CASH>                                                 46,920
<SECURITIES>                                                0
<RECEIVABLES>                                          94,373
<ALLOWANCES>                                            3,428
<INVENTORY>                                            68,984
<CURRENT-ASSETS>                                      321,692
<PP&E>                                                 89,367
<DEPRECIATION>                                         29,425
<TOTAL-ASSETS>                                        624,986
<CURRENT-LIABILITIES>                                 107,059
<BONDS>                                                73,413
<PREFERRED-MANDATORY>                                       0
<PREFERRED>                                                 0
<COMMON>                                                  515
<OTHER-SE>                                            420,530
<TOTAL-LIABILITY-AND-EQUITY>                          624,986
<SALES>                                               213,472
<TOTAL-REVENUES>                                      213,472
<CGS>                                                 111,299
<TOTAL-COSTS>                                         111,299
<OTHER-EXPENSES>                                       15,001
<LOSS-PROVISION>                                          129
<INTEREST-EXPENSE>                                      2,633
<INCOME-PRETAX>                                        36,292
<INCOME-TAX>                                           15,243
<INCOME-CONTINUING>                                    21,049
<DISCONTINUED>                                              0
<EXTRAORDINARY>                                             0
<CHANGES>                                                   0
<NET-INCOME>                                           21,049
<EPS-BASIC>                                            0.41
<EPS-DILUTED>                                            0.40