There are several types of sensors measuring speed

Speedometer in Ford Mondeo ST220 (MK3) (highli...

Speedometer is a ground vehicle speed measuring device, which is the standard equipment of each vehicle that operates on the road. Speedometer function for the driver to know the speed of vehicles executable and the primary information used to control the speed of the region / the road not to be too slow or too fast, can set the travel time and control the speed of the speed restricted road.

There are several types of sensors measuring speed

Mechanically, the speed measuring device that is connected directly to the front wheel or transmission using a cable that go spinning when the vehicle moves, rotary motion is then converted to drive jaruk speed.
Elektronic, is measuring the speed of the work on the basis of sensors placed in the vehicle drive shaft that turns the shaft for detecting the amount of data subsequently transmitted to the speedometer to the principle of Eddy currents that move the needle speed or show the speed digitally.
GPS, accelerometers are devices that use changes in the earth coordinate position data obtained from GPS satellites are processed by the processor to speed information.

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