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Vernier caliper scales; main at top, vernier at bottom. It reads 3.58 ± 0.02 mm by adding 3.00 mm (left red mark) on the fixed main scale to vernier 0.58 mm (right red mark). The main scale reading is that to the left of the zero on the vernier scale. The vernier reading is found by locating the best aligned lines between the two scales. The 0 ...
A ruler with two linear scales: the metric and imperial.It includes shorter minor graduations and longer major graduations. A graduation is a marking used to indicate points on a visual scale, which can be present on a container, a measuring device, or the axes of a line plot, usually one of many along a line or curve, each in the form of short line segments perpendicular to the line or curve.
Inside small jaws: used to measure the internal diameter of an object (like a hollow cylinder or pipe). Depth probe, or depth rod: used to measure depths of an object (like a small beaker) or a hole. Main scale (metric): marked every millimeter and helps to measure length correct up to 1 mm. Main scale (imperial): marked in inches and fractions.
Thread count, also called threadcount or threads per inch (TPI), [12] is a measure of the coarseness or fineness of fabric. It is measured by counting the number of threads contained in one square inch of fabric or one square centimetre, including both the length and width threads. The thread count is the number of threads counted along two ...
Micrometer thimble with a reading of 5.779 ± 0.005 mm. (You must enlarge the image to be able to read the scale to its fullest precision.) The reading consists of exactly 5.5 mm from the main scale plus an estimated 0.279 mm from the secondary scale. Assuming no zero error, this is also the measurement.
A fire hydrant marked as 3-inch. The inch (symbol: <3 or ″) is a unit of length in the British Imperial and the United States customary systems of measurement.It is equal to 1 / 36 yard or 1 / 12 of a foot.
8.47 mm = 1 ⁄ 3 of an inch, the notional base unit under the Composition of Yards and Perches. Digit: 19.05 mm = 3 ⁄ 4 inch Finger: 22.23 mm = 7 ⁄ 8 inch Inch: 25.4 mm: 3 barleycorns (the historical legal definition) Nail (cloth) 57.15 mm: 3 digits = 2 + 1 ⁄ 4 inches = 1 ⁄ 16 yard Palm: 76.2 mm: 3 inches Hand: 101.6 mm: 4 inches ...
A scale ruler is a tool for measuring lengths and transferring measurements at a fixed ratio of length; two common examples are an architect's scale and engineer's scale. In scientific and engineering terminology, a device to measure linear distance and create proportional linear measurements is called a scale.