Measuring tools and measuring devices

Measuring tools and measuring devices: measure

Various measuring devices

Good projects belong to a good project measuring Equipment, Only so is one exact work possible and all parts fit together later exactly. Likewise, good measuring instruments facilitate the work, since measuring tasks can be carried out more easily and no unnecessary working time is given away.

Therefore, there are suitable measuring tools for each type of measurement different accuracy ranges, While co-operating metal parts sometimes have to be manufactured to a hundredth of a millimeter, in other work millimeters or centimeters are sufficient. Therefore, a home improvement will hardly need all measuring tools.

For a first insight, we present the most common measuring equipment here.

Electronic rangefinder

Ultrasonic rangefinder

The Ultrasonic Range Finder makes, as the name suggests, the ultrasound for the benefit. Although the technique behind it is complicated, the function is relatively simple. A transmitter sends a signal via ultrasound and measures the time until it arrives at the device again. From the required time, the exact distance can be measured. However, sound spreads wide and therefore it is difficult to determine an exact measuring point. The ultrasonic distance measurement is therefore mainly suitable only for large areas.

Laser rangefinder

To the point it brings the Laser rangefinders, This works similar to the ultrasonic rangefinder, but uses a light pulse. This can be focused exactly on one point and therefore does not require large areas. However, lighting conditions and reflecting surfaces affect the measurement result.

Folding rule, yardstick, folding rule

Measuring tools and measuring devices: measure

Folding rule (yardstick, folding rule)

Ruler, yardstick or, strictly speaking, the folding rule. Everything is titled the same and everyone knows what is meant by that - the foldable measuring device that everyone has and still is always searched for.

The folding rule is available in different lengths and versions. Depending on the application he can out Wood, plastic or metal his. Common are lengths of 2 m and materials, such as wood or plastic. The quality decides the accuracy class, which is indicated by the Roman numerals I, II and III. But equally important are the joints of a folding rule. While metal hinges on wooden folding rulers promise a long life span, plastic linkage scales are often milled very precisely snap in exactly at 0°, 90° or 180°, Likewise, some folding rules offer the ability to measure angles, which is quite inaccurate and therefore only a guideline. The folding rule is the most frequently used measuring device in the DIY sector.

Measuring tape and rolling measure

Measuring tools and measuring devices: tools

Measuring tape or rolling measure

The measuring tape or rolling measure is a very space-saving measuring device, In a fairly small case, a measuring tape can be accommodated in different lengths. By default, measurements up to 2m are common but tape measures of 5m are not uncommon. Longer tape measures of up to 50m are often open and the tape is made of fiberglass.

The accuracy the tape measure is in the EC accuracy class specified. The Roman numerals I, II and III stand for the following possible deviations on one Length of 10 m:

  • I: ± 1.1 mm
  • II: ± 2.3 mm
  • III: ± 4.6 mm

Also with a rolling measure inside measurements are possible. There are decisive criteria for this. Even if often from lack of knowledge is criticized, that the Final hook loosely and can move, without this loose fit no exact measurements would be possible. In external measurements, when the end hook is hooked behind the piece to be measured, this pulls something out and the inside of the hook is the zero gauge, If the hook is pressed against an edge during internal measurements, it slides slightly pure and the outer edge is set to zero, The end hook therefore always has as much play as the sheet metal is strong, from which the end hook is made. In addition, it is possible that a rolling measure is equipped with another viewing window. In this the back of the measuring tape becomes visible with an additional scale. This is exactly shifted by the width of the rolling mill housing and thus indicates the length between the end hook and the housing outer edge in internal measurements.

Calipers and calipers

Measuring tools and measuring devices: devices

Caliper - Caliper

Measuring tools and measuring devices: devices

Reading at the caliper

The caliper or caliper is a measuring device in order Dimensions in tenths to eat. Due to the design of this measuring device is very well suited for the measurement of diametersas in the determination of screw sizes, additional pointy beak (top) allow the exact determination of internal dimensions or wells, Calipers are optionally equipped with a depth gauge, which is suitable for determining borehole depths or heights. No matter what measurement (outdoor, indoor or depth measurement) is performed, it is always read in the same way. This means that if the two main legs are attached to a 12 mm screw, the pointed legs for internal measurement also have 12 mm and the depth dimension is exactly 12 mm.

The use and reading of a caliper requires some practice, but can be learned relatively quickly.

  • These are the two measuring legs applied to the workpiece to be measured and checked, at which point the scale of the vernier (movable part) rests on the main scale. The zero stroke determines the millimeter, which is 13 mm in the example image. If the first graduation does not match one graduation of the main scale, the previous one is counted. Even if he is closer to the next tick.
  • To determine the tenth measure, it is checked which one Partial engraving on the vernier exactly on one Scale of the main scale lies. In the example it is the 5th graduation. The measured dimension is thus 13.5 mm

Fine micrometer

Measuring tools and measuring devices: measure

Fine micrometer

Micrometer (micrometer) serve, as the name implies, to fine Measures in the hundredths range, In home improvement, such accuracies are rarely needed. To enable such accurate measurements to be made two hardened measuring surfaces via a thread screwed together with a very small pitch. A Slip clutch or ratchet prevents the bolts from building up pressure and falsifying the measurement result. Depending on how far the micrometer screw can be screwed together, the appropriate measure is displayed. Since a micrometer is limited in their measuring range, they exist in increments of 25 mm.

Most micrometers have a pitch of 0.5 mm. That means that two turns one Length change of 1 mm which makes it difficult for some to correctly read a micrometer.

steel rule

Measuring tools and measuring devices: devices

steel rule

The steel measure is not only an aid for measuring, it is also good for mark out use. It can be easily bent and allows measure and score on round surfaces.

Even on metallic surfaces, the steel measure is hard enough to get one scriber to lead to the crack. There are different lengths and strengths. Thin, long dimensions can be rolled up and are thus very similar to the rolling dimensions.

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