From accelerometer devices used to measure vibrations and oscillations in machinery to wood moisture meter products designed to determine the humidity of lumber, PCE Instruments' breadth of measuring instruments and test equipment offerings covers a full range of commercial and industrial applications.

A Measuring Instrument is a device for mea...

From accelerometer devices used to measure vibrations and oscillations in machinery to wood moisture meter products designed to determine the humidity of lumber, PCE Instruments' breadth of measuring instruments and test equipment offerings covers a full range of commercial and industrial applications.

A Measuring Instrument is a device for measuring a physical quantity. In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining and comparing physical quantities of real-world objects and events. Established standard objects and events are used as units, and the process of measurement gives a number relating the item under study and the referenced unit of measurement. Measuring instruments, and formal test methods which define the instrument's use, are the means by which these relations of numbers are obtained. All measuring instruments are subject to varying degrees of instrument error and measurement uncertainty.

Scientists, engineers and other humans use a vast range of instruments to perform their measurements. These instruments may range from simple objects such as rulers and stopwatches to electron microscopes and particle accelerators. Virtual instrumentation is widely used in the development of modern measuring instruments.


Measuring  There are 18 products.


  • Ruler

    ruler, sometimes called a rule or line gauge, is a device used in geometry, technical drawing, engineering and building to rule straight lines. Engineering designers used (before the advent of CAD) devices with graduations marked on their edge called scales, when setting out or measuring length on a drawing. They did not draw lines with their scales, they used set or T squares when ruling a line.

    Rulers have long been made from different materials and in a wide range of sizes. Some are wooden. Plastics have also been used since they were invented; they can be molded with length markings instead of being scribed. Metal is used for more durable rulers for use in the workshop; sometimes a metal edge is embedded into a wooden desk ruler to preserve the edge when used for straight-line cutting. 12 in or 30 cm in length is useful for a ruler to be kept on a desk to help in drawing. Shorter rulers are convenient for keeping in a pocket. Longer rulers, e.g., 18 in (46 cm) are necessary in some cases. Rigid wooden or plastic yardsticks, 1 yard long, and meter sticks, 1 meter long, are also used. Classically, long measuring rods were used vt|for larger projects, now superseded by tape measure or laser rangefinders.

    Desk rulers are used for three main purposes: to measure, to aid in drawing straight lines and as a straight guide for cutting and scoring with a blade. Practical rulers have distance markings along their edges.

    A line gauge is a type of ruler used in the printing industry. These may be made from a variety of materials, typically metal or clear plastic. Units of measurement on a basic line gauge usually include inches, agate, picas, and points. More detailed line gauges may contain sample widths of lines, samples of common type in several point sizes, etc.

    Measuring instruments similar in function to rulers are made portable by folding (carpenter's folding rule) or retracting into a coil (metal tape measure) when not in use. When extended for use, they are straight, like a ruler. The illustrations on this page show a 2 m (6 ft 7 in) carpenter's rule, which folds down to a length of 25 cm (10 in) to easily fit in a pocket, and a 5 m (16 ft) tape, which retracts into a small housing.

    A flexible length measuring instrument which is not necessarily straight in use is the tailor's fabric tape measure, a length of tape calibrated in inches and centimeters. It is used to measure around a solid body, e.g., a person's waist measurement, as well as linear measurement, e.g., inside leg. It is rolled up when not in use, taking up little space.

    contraction rule is made having larger divisions than standard measures to allow for shrinkage of a metal casting. They may also be known as a shrinkage or shrink rule.

    -- Wikipedia

  • Calipers
    caliper (British spelling also calliper, or in plurale tantum sense a pair of calipers) is a device used to measure the distance between two opposite sides of an object. A caliper can be as simple as a compass with inward or outward-facing points. The tips of the caliper are adjusted to fit across the points to be measured, the caliper is then removed and the distance read by measuring between the tips with a measuring tool, such as a ruler.

    It is used in many fields such as mechanical engineering, metalworking, forestry, woodworking, science and medicine.

    vernier scale is a visual aid to taking an accurate measurement reading between two graduation markings on a linear scale by using mechanical interpolation; thereby increasing resolution and reducing measurement uncertainty by using Vernier acuity to reduce human estimation error.

    The vernier is a subsidiary scale replacing a single measured-value pointer, and has for instance ten divisions equal in distance to nine divisions on the main scale. The interpolated reading is obtained by observing which of the vernier scale graduations is co-incident with a graduation on the main scale, which is easier to perceive than visual estimation between two points. Such an arrangement can go to higher resolution by using higher scale ratios, known as the vernier constant. A vernier may be used on circular or straight scales where a simple linear mechanism is adequate. Examples are calipers and micrometers to measure to fine tolerances, on sextants for navigation on theodolites in surveying, and generally on scientific instruments. The Vernier principle of interpolation is also used for electronic displacement sensors such as absolute encoders to measure linear or rotational movement, as part of an electronic measuring system.

  • Tapes

    tape measure or measuring tape is a flexible ruler and used to measure distance.

    It consists of a ribbon of cloth, plastic, fibre glass, or metal strip with linear-measurement markings. It is a common measuring tool. Its design allows for a measure of great length to be easily carried in pocket or toolkit and permits one to measure around curves or corners. Today it is ubiquitous, even appearing in miniature form as a keychain fob, or novelty item. Surveyors use tape measures in lengths of over 100 m.

    There are two basic types of tape measures with cases, spring return pocket tape measures and long tape measures. Spring return pocket tape measures will generally fit in a pocket. They are small, the case is up to about three inches across. The tape is returned to the case by a spring mechanism. Pocket tape measures have a tape one foot to fifteen feet in length and ¼ to ¾ inches across. When most people think of a tape measure, they are thinking of the pocket tape measure.

    A second tape measure design is what is called the long tape. These are cased tape measures with tapes of 25, 50, 75, 100, 200, 300, and even 500 feet in length, designed for engineers and builders. Because surveying was usually done in rods, surveyors use long tapes of 33 feet (2 rods), and 66 feet (4 rods). Surveyors also used 49½ feet of a 50-foot tape for 3 rods and 99 feet of a 100-foot tape measure for 6 rods. Long tapes instead of being returned by a spring, were usually returned by hand crank.

    Tape measures are often designed for specific uses or trades. Tapes may have different scales, be made of different materials, and be of different lengths depending on the use it is intended for. Tape measures that were intended for use in tailoring or dressmaking were made from flexible cloth or plastic. They are named “sewing tape”. These types of tape measures were mainly used for the measuring of the subject’s waist line. Today, measuring tapes made for sewing are made of fiberglass, which does not tear or stretch as easily. Measuring tapes designed for carpentry or construction often use a stiff, curved metallic ribbon that can remain stiff and straight when extended, but retracts into a coil for convenient storage. This type of tape measure will have a floating tang or hook on the end to aid measuring. The tang is connected to the tape with loose rivets through oval holes, and can move a distance equal to its thickness, to provide both inside and outside measurements that are accurate. A tape measure of 25 or even 100 feet can wind into a relatively small container. The self-marking tape measure allows the user an accurate one hand measure.

  • Gauge

    gauge or gage, in science and engineering, is a device used to make measurements or in order to display certain dimensional information. A wide variety of tools exist which serve such functions, ranging from simple pieces of material against which sizes can be measured to complex pieces of machinery. Depending on usage, a gauge can be described as "a device for measuring a physical quantity", for example "to determine thickness, gap in space, diameter of materials, or pressure of flow", or "a device that displays the measurement of a monitored system by the use of a needle or pointer that moves along a calibrated scale".

    All gauges can be divided into four main types, independent of their actual use.

    1. Analogue instrument meter with analogue display ("needles"). Until the later decades the most common basic type.
    2. Digital instrument meter with analogue display. A screen that shows an "analogue meter", commonly used in modern aircraft cockpits, and some hospital equipment etc.
    3. Digital instrument meter with digital display. Only numbers are shown at a digital display.
    4. Analogue instrument meter with digital display. Only numbers are displayed, but through a mechanical or electro-mechanical display (today very rare but has existed for clocks, certain Doppler meters and informational screens at all kinds of stations and airports)

    The two first basic types are usually easier for the human eyes and brain to interpret, especially if many instrument meters must be read simultaneously. The other two types are only displaying digits, which are more complex for humans to read and interpret. The ultimate example is cockpit instrumentation in aircraft. The flight instruments cannot display figures only, hence even in the most modern "glass-cockpits" where almost all instruments are displayed at screens, few figures are visible. Instead the screens display analogue meters.

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