SHD30 (20700196): Digital Tachometer and Hourmeter

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SKU: SHD30 (20700196)

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The SHD30 is a microprocessor-based digital tachometer with an hourmeter and an overspeed trip point. The trip point can be connected as either a form "c" relay output or as a normally open SCR output for alarm or shutdown on overspeed. The five-digit, liquid crystal display is updated every second.

The SHD30 receives power and RPM data from either a magnetic pickup or a capacitor discharge (CD) ignition. The hourmeter is adjustable to a preset time and resettable to zero. Should power be lost, on-board batteries maintain the run hours display and allow for resetting the overspeed relay output.

Approved for Class I, Division 2, Groups C & D hazardous areas.

Sales Bulletin

Installation Instructions

Wiring Instructions


For California customers: Prop 65 WARNING: This product may have been manufactured with or uses components that can expose you to chemicals which are known to the State of California to cause cancer. For more information go to


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