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2. Tachometer - Wikipedia

   en.wikipedia.org/wiki/Tachometer

   A tachometer that can indicate up to 7000 RPM (left) A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. [1] The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are ...

3. Redline - Wikipedia

   en.wikipedia.org/wiki/Redline

   Tachometer showing red lines above 14,000 rpm.. Redline refers to the maximum engine speed at which an internal combustion engine or traction motor and its components are designed to operate without causing damage to the components themselves or other parts of the engine. [1]

4. Tachymeter (watch) - Wikipedia

   en.wikipedia.org/wiki/Tachymeter_(watch)

   Tachymeter scale on a Citizen watch bezel. A tachymeter (pronounced / t æ ˈ k ɪ m ə t ər /) is a scale sometimes inscribed around the rim of an analog watch with a chronograph.It can be used to conveniently compute the frequency in inverse-hours of an event of a known second-defined period, such as speed (distance over hours) based on travel time (distance over speed), or measure distance ...

5. List of measuring instruments - Wikipedia

   en.wikipedia.org/wiki/List_of_measuring_instruments

   speed, velocity of a vehicle spirometer: the lung capacity spherometer: radius of a sphere sphygmomanometer: blood pressure stadimeter: object range strainmeter: seismic strain SWR meter: standing wave ratio Synthetic Aperture Radar: reflectivity and moisture tacheometer: distance tachometer: revolutions per minute, rate of blood flow, speed of ...

6. Rev limiter - Wikipedia

   en.wikipedia.org/wiki/Rev_limiter

   Adjusting the throttle generally adjusts spring tension on the governor, which in turn allows the engine to run faster or slower, as desired. While the redline cannot be seen on most small engines, due to their lack of a tachometer, the risk of excessive engine speed is not generally a concern. [2]

7. Eddy-current sensor - Wikipedia

   en.wikipedia.org/wiki/Eddy-current_sensor

   Eddy current sensors are displacement sensors that use the principle of eddy current formation to sense displacement. These sensors measure shaft displacement in rotating machinery and have been around for many years as they offer manufacturers high-linearity, high-speed measurements, and high resolution. [1]