The left height gauge has the vernier scale, while the right one is an electronic height gauge with a digital readout.
A height gauge is a measuring device used either for determining the height of something, or for repetitious marking of items to be worked on. The former type of height gauge is often used in doctor’s surgeries to find the height of people.
These measuring tools are used in metalworking or metrology to either set or measure vertical distances; the pointer is sharpened to allow it to act as a scriber and assist in marking out work pieces.
They may also be used to measure the height of an object by using the underside of the scriber as the datum. The datum may be permanently fixed or the height gauge may have provision to adjust the scale, this is done by sliding the scale vertically along the body of the height gauge by turning a fine feed screw at the top of the gauge; then with the scriber set to the same level as the base, the scale can be matched to it. This adjustment allows different scribers or probes to be used, as well as adjusting for any errors in a damaged or resharpened probe.
Types
There are two types of height gauges: Vernier height gauges and electronic height gauges. The vernier height gauge has the additional refinement of a vernier scale for greater accuracy in reading or setting the tool. The electronic height gauge has a digital readout that gives the height.
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Vernier height gauge adjusters, close up view
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Vernier height gauge, close up view
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Electronic height gauge, close up view
See also
This information originally retrieved from http://en.wikipedia.org/wiki/Height_gage
on Monday 1st August 2011 8:27 pm EDT
Now edited and maintained by ManufacturingET.org
