Acid hydrometers; Chronographs for use as specialized time recording apparatuses; Flowmeters; Galvanometers; Gas testing instruments; Hygrometers; Measuring bowls; Measuring cups; Measuring glassware; Measuring rulers; Measuring spoons; Micrometers; Ozonisers; Refractometers; Scales; Telescopes; Time switches, automatic; Voltmeters; Compasses; Instruments for measuring length; Magnifying glasses; Pocket calipers for measuring; Pressure gauges; Radiation-measuring instruments; Range finders; S...