Revolutions per minute ( abbreviated rpm, RPM, r/ min, or rĀ · min 1) is a measure of the frequency of a rotation. It annotates the number of turns completed in one minute around a fixed axis. It is....
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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....
water temperature gauge ( WT gauge) is a meter used to monitor the water temperature of an internal combustion engine or rotary engine in conjunction with a thermocouple-type pyrometer. Brand....
A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. Analog voltmeters move a pointer across a scale in proportion to the voltage....
Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gaugesor vacuum gauges. A manometer could also refer to a....
Ampere Meter : Few calculations actually involve the strength of a pole in ampere-meters because a single magnetic pole has never been isolated. Magnets are dipoles which require more complicated....
A fuel gauge ( or gas gauge) is an instrument used to indicate the level of fuel contained in a tank.[ 1] Commonly used in cars, these may also be used for any tank including underground storage....