Barometers; Hydrometers; Hygrometers; Manometers; Pyrometers; Refractometers; Scales; Thermostats; Timers; Chronographs for use as specialized time recording apparatuses; Gas testing instruments; Metal detectors; Meteorological instruments; pH meters; Pressure gauges; Pressure measuring apparatus; Range finders; Surveying instruments; Thermometers, not for medical purposes; Tool measuring instruments; Weighing apparatus and instruments