Precision Measurement: Instruments and Unit Systems Explained
Measuring Instruments: Definition and Features
A measuring instrument is a device designed to be used to make measurements, either alone or in conjunction with ancillary equipment.
For proper use, the key features of a measuring instrument to be aware of are:
Graduated System
This system will have its divisions. If the tenth division is a number, it indicates the metric system, where each division is 1 mm. Otherwise, it is the English system.
Figure 1.2: Metric Ruler
Range
The range of a measuring instrument is the field between the minimum and maximum values that can be measured.
Figure 1.4: Range of a Ruler and a Micrometer
Degree of Accuracy or Reading
This refers to the value of the minimum, exact subdivision that can be read on the instrument.
Figure