9 Measuring, detecting, monitoring and controlling devices, namely, instruments for measuring length, measuring tapes, laser measuring systems, radon detectors, metal detectors, magnetic object detectors, mine detecting apparatus, electrical controlling devices, power controllers; safety, security, protection and signalling devices, namely, flashing safety lights, luminous beacons for safety purposes, traffic light apparatus, signal whistles; scientific research and laboratory apparatus, namely, microarrays, test tubes, crucibles, ionization apparatus for scientific or laboratory use, centrifuges used as laboratory apparatus; educational apparatus and simulators, namely, electronic clinicians training simulators, vehicle drive training simulators, manipulative blocks used as teaching aids for the visualization of math concepts