The Starrett 3732 Electronic Micrometer is a full-featured precision measuring tool built with customary Starrett quality and workmanship. The 3732 series includes a large, easy-to-read, high-contrast LCD digital readout for clear readings. With its automatic OFF functionality, smooth friction thimble for uniform pressure, and balanced frame design, Starrett products provide comfortable and accurate measuring Its no-glare satin chrome finish minimizes annoying surface glare under bright lights indoors. 0-25mm (0-.984 Approx Inch), 0.001mm (0.00005") Resolution
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A caliper is a tool used to measure the distance between two opposite points of an object. Basically, a caliper’s points are extended to the two points being measured and the length is measured using the included scale or ruler on the caliper.
There are different types of calipers. These are the Vernier, dial and digital. A Vernier caliper provides a direct reading about the distance between the two sides of an object. These calipers have a calibrated scale, with two jaws as its measuring point. One jaw is fixed and serves as the reference point, while the other jaw moves along the scale. The scale themselves have additional measuring scales that should be added to measurement made on the primary scale.
The dial caliper uses an analog dial together with the scale for measurement. A precise rack and pinion mechanism that is attached to a pointer. Generally, the pointer rotates once whenever a specified length is achieved. This measurement is then added to the measured value using the scale.
The digital caliper uses a digital display that shows the exact measurement in a single value depending on the unit of measurement set by the user. Because the measurement is displayed in a single value, digital calipers the easiest to use compared to the two other types of calipers since there are no additional calculations that needs to be done to make an accurate measurement.
There are also other variations of the caliper. A depth gauge works similarly to a caliper, but instead determines water depth by measuring water pressure and density. Again, the digital variety is the easiest and most convenient to use.
A micrometer looks similar to a caliper but is best suited for precision measurement. Instead of jaws, a micrometer uses an anvil and a spindle for measurement. With each revolution of the rachet, the spindle moves 0.5 mm towards the anvil. The total measurement based on the number of revolutions is then added to the measurement using the main scale.
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