Exhibit 21
THERMEDICS INC.
Subsidiaries of the Registrant
At March 6, 1996, Thermedics Inc. owned the following companies:
State or Jurisdiction Registrant's
Name of Incorporation % of Ownership
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Analytical Technology, Inc. Delaware 100%
Orion Foreign Sales Corp. U.S. Virgin Islands 100%
Orion Research Limited United Kingdom 100%
Orion Research Puerto Rico, Inc. Puerto Rico 100%
Corpak Inc. Massachusetts 100%
Walpak Company Illinois 100%
Orion Research, Inc. Massachusetts 100%
Russell pH Limited Scotland 100%
Thermedics Detection Inc. Massachusetts 100%
Rutter & Co. Netherlands 100%
Rutter Instrumentation S.A.R.L. France 90%
Systech B.V. Netherlands 50%
ThermedeTec Corporation Delaware 100%
Thermedics Detection de Argentina S.A. Argentina 100%
Thermedics Detection de Mexico, S.A. de C.V. Mexico 100%
Thermedics Detection GmbH Germany 100%
Thermedics Detection Limited United Kingdom 100%
Thermedics Detection Scandinavia AS Norway 100%
Thermedics F.S.C. Inc. U.S. Virgin Islands 100%
Thermo Sentron Inc. Delaware 100%
Ramsey France S.A.R.L. France 100%
Ramsey Ingenieros S.A. Spain 100%
Ramsey Italia S.R.L. Italy 100%
Tecno Europa Elettromeccanica S.R.L. Italy 100%
Ramsey Technology Inc. Massachusetts 100%
Xuzhou Ramsey Technology Co., Limited China 50%
Thermedics Australia Pty. Ltd. Australia 100%
Thermo Sentron B.V. Netherlands 100%
Thermo Sentron Canada Inc. Canada 100%
Thermo Sentron GmbH Germany 100%
Thermo Sentron Limited United Kingdom 100%
Hitech Electrocontrols Limited United Kingdom 100%
Hitech Licenses Ltd. United Kingdom 100%
Hitech Metal Detectors Ltd. United Kingdom 100%
Thermo Sentron SEC Corporation Massachusetts 100%
Thermo Sentron (South Africa) Pty. Ltd. South Africa 100%
TMD Securities Corporation Massachusetts 100%
Thermo Cardiosystems Inc. Massachusetts 52%
TCA Securities Corporation Massachusetts 100%
Thermo Voltek Corp. Delaware 50%
Comtest Europe B.V. Netherlands 100%
Comtest Instrumentation, B.V. Netherlands 100%
Comtest Limited United Kingdom 100%
KeyTek FSC, Ltd. U.S. Virgin Islands 100%
TVL Securities Corporation Delaware 100%
UVC Realty Corp. New York 100%