Exhibit 21
THERMOSPECTRA CORPORATION
Subsidiaries of the Registrant
At February 28, 1999, the Registrant owned the following companies:
Name State or Registrant's
Jurisdiction % of
of Incorporation Ownership
- ------------------------------------ ----------------------------------- -----------------------------------
Gould Instrument Systems, Inc. Ohio 100%
Kevex Instruments Inc. Delaware 100%
Kevex X-Ray Inc. Delaware 100%
NesLab Instruments Europa BV The Netherlands 100%
NesLab Instruments, Inc. New Hampshire 100%
NesLab Instruments Limited England 100%
Nicolet Instrument Technologies Wisconsin 100%
Inc.
NORAN Instruments Inc. Wisconsin 100%
ThermoMicroscopes Corp. California 100%
ThermoMicroscopes S.A. Switzerland 100%
PSI Virgin Islands Incorporated U.S. Virgin Islands 100%
Sierra Research and Technology, Delaware 100%
Inc.
ThermoSpectra B.V. The Netherlands 100%
Nicolet Technologies B.V. The Netherlands 100%
Bakker Electronics Limited United Kingdom 100%
NORAN Instruments B.V. The Netherlands 100%
ThermoSpectra GmbH Germany 100%
Gould Nicolet Messtechnik GmbH Germany 100%
NORAN Instruments GmbH Germany 100%
ThermoMicroscopes GmbH Germany 100%
ThermoSpectra Limited United Kingdom 100%
Nicolet Technologies Ltd. United Kingdom 100%
ThermoSpectra S.A. France 100%
Nicolet Technologies S.A.R.L. France 100%