Tachometers are instruments that measure speed, or the rate of revolutions of a shaft. Tachometers are attached to automobiles to determine the revolutions per minute on the engine's crankshaft.Continue Reading
Tachometers have markings on their gauges to indicate safe operating speeds. This information can assist the operator in choosing the right settings for the driving conditions. Long-term abuse of a crankshaft may cause poor lubrication, overheating, excessive speed, excessive wear or permanent damage to the engine.
Tachometers are also used to measure automobile traffic speed and flow. A test vehicle armed with a sensor goes on a run around a designated area. Data is collected and analyzed to evaluate traffic design and other forms of traffic engineering.Learn more about Car Parts & Maintenance