SN78SM - Classic Instruments MAGNETIC PROXIMITY SENSOR - ALL Classic Instruments - Classic Instruments

$115.00 $102.44

MAGNETIC PROXIMITY SENSOR: Classic Instruments


Senses ferrous targets to generate a square wave signal for tachometers and speedometers - May also require SN74Z


MAGNETIC PROXIMITY SENSOR: Classic Instruments

Senses ferrous targets to generate a square wave signal for tachometers and speedometers - May also require SN74Z

The Magnetic Proximity Sensor will respond to pulse signals across a 1/16" air-gap between the sensor tip and disk-rotor, IRS-CV joint bolt-heads or notched brake-drum edge.

It is useful on trans-axle setups or transmissions without mechanical speedometer cable connection.

Using a stock GM Speed Sensor - 700R, 4L60, etc. Our Speed Pulse Convertor Box is used on late model GM 700-R or 4L60 over-drive transmission applications with a GM VSS (Vehicle Speed Sensor). This Convertor Box will convert the signals from the stock GM-VSS so your Classic Programmable Speedometer will read and operate correctly. The original GM-VSS signal can still be used to operate your fuel-injection, engine monitoring, transmission shift points, etc.

Tachometer Filter Our Tach Filter is supplied with most Classic Tachometers. Installed between the Tachometer and the Ignition Trigger Source (usually the coil) this filter traps, redirects, and dissipates the high voltage spikes and surges that are emitted by any late-model high-energy ignition system.

It also modifies the sharp up-and-down spikes into a semi-square wave signal for steady pointer readings and faster pointer response. Three color-coded wires allow for fast and easy fool-proof connections for life-time protection and superior response on all Classic Tachometers.

Classic Instruments: THE SIMPLE GOAL OF PERFECTION
Classic Instruments was founded and continues with one simple goal; To be the very best in the world. That's why we work hard every day to remain the top choice of knowledgeable automotive professionals and performance enthusiasts since 1977.

yellow caution triangle with exclamation pointWARNING: This product can expose you to Lead which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.