A digital tachometer measures the speed of objects. They measure the rotations of an engine shaft in a car and then record the number of revolutions per minute on a dial.
No, it is illegal.
www.checkline.com provides the opportunity of comparision of portable tachometers. they offer a complete line of Tachometer, Contact Tachometer and Combination Digital Hand-Held Tachometer.
John Hone Bartol has written: 'A digital tachometer/accelerometer'
THERE ARE TWO TYPES OF TACHOMETER. 1.D.C. TACHOMETER 2.A.C. TACHOMETER ALSO DIGITAL TACHOMETERS CAN BE CONSTRUCTED using various principles..... D.C. TACHOMETER its construction is very similar to a D.c. generator. it works on the principle of generation of emf wen a rotating conductor cuts the magnetic flux......when magnetic flux is constant then the emf produce is directly proportional to the speed of the armature that is coupled to the shaft of motor. A.C. tachometer its construction is similar to a two phase servo motor.... and works conversly of it....
Laser tachometer are instruments used to measure the rotation speed of a shaft or disk, as in motor or other machine. They usually display the revolutions per minute (RPM) on a calibrated analogue dial or digital display.
Remove the instrument panel cover. Remove the tachometer retaining screws. Remove the tachometer cable from the back of the tachometer. Reverse the process to install the new tachometer.
The digital meters measure frequency by counting the number of input pulses which occur in short period of time called gating period
you need a tachometer
The tachometer cable may be faulty. The tachometer sensor, on the side of the engine might not be functioning properly.
The Mazda tachometer and the speedometer have separate cables. The tachometer cable probably does not work properly. Change the tachometer cable.
You can perhaps buy a used portable tachometer by going on to www.amazon.com
Here's a site where you can buy a handheld tachometer: http://www.checkline.com/tachometers/