EXHIBIT 21.0

Subsidiaries of FLIR Systems, Inc.

• FLIR Systems Ltd., a United Kingdom Corporation

• FLIR Systems CV, a Netherlands Corporation

• FLIR Systems Ltd., a Canadian Corporation

• Indigo Systems Corporation, a California, USA Corporation

• Scientific Materials Corporation, a Montana, USA Corporation

• FSI Holdings, Inc., an Oregon, USA Corporation

• FLIR Systems Aviation, LLC, an Oregon, USA Limited Liability Company

• Extech Instruments Corporation

• FLIR Systems Middle East FZE

• FLIR Systems International Ltd., a United Kingdom Corporation (dormant)

• Inframetrics Infrared Systems Ltd., a United Kingdom Corporation (dormant)

• FLIR Systems Israel Ltd., a Israeli Corporation (dormant)

• Extech Instruments Trust (dormant)