Platinum 4 Tachometer - 7000 RPM Gas - Inboard, Outboard IOFaria Beedes Platinum Series Instruments feature spun aluminum gauge dials with custom graphics and a polished stainless steel bezel providing a rugged, elegant look. All Platinum Series gauges feature Farias revolutionary domed glass Fog-Resistant lens. These lenses shed condensation and resists scratching and other types of fouling common in the marine environment.Electronic tachometers work by counting pulses generated by the ignitio