Multiple-valued measures are further divided into those that reproduce discrete values of the corresponding quantities, such as resistance boxes, and those that continuously reproduce quantities in some range, for example, a measuring capacitor with variable capacitance. Examples of multiple-valued measures are graduated rulers, measuring tapes, resistance boxes, and so on. ![]() Single-valued measures, multiple-valued measures, and collections of measures are distinguished. Examples of measures are balance weights, measuring resistors, measuring capacitors, and reference materials. A material measure is a measuring instrument that reproduces one or more known values of a given quantity. ![]() Measuring instruments are divided into material measures, measuring transducers, indicating instruments, recording instruments, and measuring systems. A general property of measuring instruments is that their accuracy is known. Measuring instruments are the technical objects that are specially developed for the purpose of measuring specific quantities.
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