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Portable Tachometers 1

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gav

gav

Automotive
Dec 28, 2000
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Could anyone tell me the name of the company or where to find info on the tachometers used at the emissions testing centre. They are just placed on top of the hood of the vehicle. How do they actually measure engine speed?
Thanks
Gav
 
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Bear / Sun / specific leads for engine analyzers.

Other handhelds available using IR technology.

Pads over the hood detect the HIGh voltage from the IGNITION system.

IR uses the reflections and doppler
 
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