Oppama PET - Black Tachometer is a measuring instrument used to measure an engine's operating speed in revolutions per minute. This Black Tachometer is a pulse-activated tachometer that monitors the RPM of two types of gasoline engines. Black Tachometer is commonly used in automobiles, aeroplanes, and medical and instrumentation applications. Some different tachometers, some based on measuring the frequency of, or the time between, pulses generated by the rotating shaft. It is also known by several other terms, including a rev-counter and RPM gauge. These products comprise an LCD or LED readout and storage memory. These can perform statistical operations and are very suitable for precision measurement and monitoring any kind of time-based quantities. Digital tachometers are more common these days, and they provide numerical readings instead of using dials and needles. Product Specifications Brand: Oppama Colour: Black Model: PET-1010 Product: Tachometer Weight: 0.3 Kg