Anemometers; Dynamometers; Gas detectors for detecting the presence of gas; Hygrometers; Laser rangefinders; Level measuring machines; Magnifying glasses; Metal detectors for industrial or military purposes; Micrometers; Microscopes; Oscilloscopes; Pressure gauges; Protractors; Slide calipers; Thermometers, not for medical purposes; Transmitters of electronic signals; Voltmeters; Weighing scales; Welding masks