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Promoted item:5" ADJUSTABLE 7-COLOR LED TACHOMETER GAUGE 11K RPM TACH METER+SHIFT LIGHT BLACK

5" ADJUSTABLE 7-COLOR LED TACHOMETER GAUGE 11K RPM TACH METER+SHIFT LIGHT BLACK

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  • 5d 10h 46m
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  • speed_daddy
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    The item is listed as a Top Rated Plus item
  • US $42.98
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  • Quantity 10+Available
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About Tachometers

A device used to measure the speed of any moving object is known as a tachometer. The term tachometer is of Greek origin wherein 'tachos' means speed and 'metron' means measure. The most conventional from of the tachometer is the one used to measure speed of a rotating shaft. Traditionally, analog readouts in the form of an analog dial was used, however digital displays are also becoming popular. A German engineer named Dietrich Uhlhorn invented the tachometer in the year 1817. It made use of centrifugal force to measure the speed of the object. Since the 1840s, they have been used to measure the speed of locomotives. Automotive tachometers display the rate of rotation of the engine's crankshaft after measuring the spark rate of the ignition system. The display is generally in revolutions per minute. This helps the driver maintain engine speeds that ensure ideal driving conditions. Tachometers attached to cars, aero planes, and other vehicles have markings that indicate safe speeds at which the engines may be operated, as lengthened use at high speeds causes wear and tear of the engine. The maximum speed limits are marked in red; this gave rise to the expression 'redlining'. Tachometers are also used during analog audio recordings to measure the speed of the audio tape passing across the head. Tachometers are also known to be used to measure the rate of blood flow at a particular point through the body. These devices are specifically called haematachometers.