Aerometers; Air analysis apparatus; Altimeters; Anemometers; Densimeters; Diagnostic apparatus for testing food; Distance measuring apparatus; Electronic numeric displays; Ergometers not for medical purposes; Frequency meters; Hygrometers; Manometers; Measuring devices, namely, fluorometers; Measuring instrumentation and apparatus, namely, digitizers; Micrometers; Oscillographs; Range finders for cameras; Slide calipers; Surveying instruments; Tool measuring instruments; Viscosimeters