MT90-1 Digital Tachometer (20700019)

MT90-1: Digital Tachometer; white background face plate (20700019)

The Murphy Selectronic MT90-1 is a digital tachometer. Its high accuracy and dependability result from use of a quartz crystal time based and digital, solid-state electronics.

Tachometer power is supplied by either a Murphy magnetic pickup, mounted at the flywheel ring-gear of an engine, or by a 12-, 24-, or 32-volt DC battery system. RPM data is supplied by either a Murphy magnetic pickup or by the alternator in your battery charging circuit.

The MT90 also has back-lighting for easy readings in low lit areas; this lighting requires a battery power source.