Structural Monitoring Systems Plc, together with its subsidiaries, designs, develops, manufactures, and sells structural health monitoring systems for the aviation industry in Australasia, the Americas, Europe, Asia, the Middle East, and Africa. It offers comparitive vacuum monitoring sensors used to detect cracks on aircraft. The company also manufactures avionics and audio systems. Structural Monitoring Systems Plc was incorporated in 2003 and is based in Claremont, Australia.