Note that there is a small difference between the simulation and a realĬaliper: in the simulation the distance between the jaws is always an even When you click on the Show button the distance between "grab" the jaw of the caliper with the left button of the mouse and move it to There is also a piece of metal sticking out from the right side of the caliper, which is a depth gauge.Ĭalipers commonly use a vernier scale. In the above photograph, you can see that on the top of the caliper are two "prongs" which can be used to measure an interior dimension. The Object is almost exactly 75 mm (2.95 in) The Object will be placedīetween the "jaws" of the caliper. AĬaliper measures a length, and in the following figure we show a caliper being Now we shall use a simulation of a Vernier Caliper. This "reading error" of ± 0.02 is probably the correctĮrror of precision to specify for all measurements done with this Might report this reading as 756.73 ± 0.02. Somewhat below the corresponding line of the scale. In fact, the 7 line on the vernier appears to be a little bitĪbove the corresponding line on the scale. The scale, the 7 line matches fairly closely. Looking for divisions on the vernier that match a division on The pointer points to a value that is obviously greater than 756.5 and also Here is a final example, with the vernier at yet another position. This means that ourįirst guess was correct: the reading is 756.5. Up exactly with one of the lines on the scale, the 5 line. If you look you will see that only one line on the vernier lines Here the "pointer" lines up at approximately 756.5 on the The pointer, the line marked 0, may not line up exactly with one of the lines If we do another reading with the vernier at a different position, On the vernier are 90% of the distance between the divisions on the Line on the vernier lines up at 756 on the scale, but the 10 line on the If you look closely you will see that the distance between theĭivisions on the vernier are not the same as the divisions on the scale. Measured position is almost exactly 756 in whatever units the scale is The "pointer" is the line on the vernier labelled "0". This could be part of a barometer which reads atmospheric pressure. In theįigure to the right, the Vernier moves up and down to measure a position on the We also offer an in-house calibration service.A Vernier allows a precise reading of some value. Our range of depth gauges is of the highest quality, available in analogue and digital variants, sourced from leading brands such as Mitutoyo, Starrett, and RS PRO. You can also use them to measure and locate centre distances.Why would you choose RS for depth gauges?We support engineers with the best in class linear measurement devices. Ensure the slide is perpendicular to the base for a true reading.ApplicationsAnyone doing construction or remodelling work and in need of accurate measurements of the depth of a slot, hole or recess will find a mechanical depth measurement tool handy. To operate simply place the depth gauge inside the hole or slot to be measured then move the ruler and the slide down until you reach the mating surfaces. These type of depth gauges allow the user to obtain additional precision measurement readings using this principle.How do they work?Depth gauges are effectively made up of two components, a measuring ruler and a slide head that has a flat base. Normally battery powered by a coin cell battery such as an SR44 or similar.Vernier depth gauges use the Vernier scale. Digital depth gauges require an additional power source to work. Gauges can be analog, digital or Vernier type gauges.Analog depth gauges or dial depth gauges have a dial and a needle indicator that shows the depth measurement on the face of the dial.Digital depth gauges use a digital display that shows the depth measurement in a numerical format. Some models offer dual options showing both imperial and metric measurements. So, if you are looking for a depth gauge, we undoubtedly will have the ideal solution to meet your needs.Types of depth gaugesDepth gauges have measurement scales in inch or metric (millimetre) values. These gauges are simplistic in their design and easy use. Using a ruler and eyeballing the depth is a technique from the past, depth gauges are the right way to go. Depth Gauges Achieving an accurate reading of a component depth can be somewhat frustrating without the right tool.
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