<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THERMEDICS
INC.'S ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 28, 1996 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-28-1996
<PERIOD-END>                               DEC-28-1996
<CASH>                                          82,800
<SECURITIES>                                    65,054
<RECEIVABLES>                                   67,686
<ALLOWANCES>                                     4,903
<INVENTORY>                                     54,230
<CURRENT-ASSETS>                               279,580
<PP&E>                                          48,892
<DEPRECIATION>                                  27,342
<TOTAL-ASSETS>                                 456,699
<CURRENT-LIABILITIES>                           71,410
<BONDS>                                         74,359
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         3,684
<OTHER-SE>                                     207,898
<TOTAL-LIABILITY-AND-EQUITY>                   456,699
<SALES>                                        292,077
<TOTAL-REVENUES>                               292,077
<CGS>                                          148,137
<TOTAL-COSTS>                                  148,137
<OTHER-EXPENSES>                                39,000
<LOSS-PROVISION>                                 1,352
<INTEREST-EXPENSE>                               3,770
<INCOME-PRETAX>                                 51,497
<INCOME-TAX>                                    13,969
<INCOME-CONTINUING>                             29,138
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    29,138
<EPS-PRIMARY>                                      .80
<EPS-DILUTED>                                      .75