Faria Beede Instruments Faria 33834 Chesapeake Tachometer Gauge with Hourmeter Diesel - White SS, 4"

Electronic tachometers work by counting pulses generated by the ignition system, alternator, tach signal generator or magnetic pickup sender. The tach is hooked up to +12vDC, Ground. By selecting the right tach and setting the switch on the back to the correct position you let the tachometer know how many pulses are sent per each engine revolution.

• Wide range of scales
• Available for gas or diesel engines
• Multiple signal sources