Measuring instruments, indicators and controllers; laser sensors; photoelectric sensors; electro-optical sensors; piezoelectric sensors; optical sensors; infra-red sensors; pyroelectric infrared sensors; measuring sensors; pressure sensors; sensors and detectors; optical fibre sensors; sensors used in plant control; optical speed sensors; sensors for use with machine tools; laser probes for scientific purposes; laser circuit testers; laser diodes; lasers for measuring purposes; lasers for ind...