The DSL-1 Universal Diesel Tachometer Adaptor will accept a signal from the "W" terminal found on some diesel alternators (not all alternators used on diesel engines have this extra terminal) and converts the signal into a tachometer signal for a 4 or 8 cylinder standard ignition system tachometer. The DSL-1 is adjustable to allow for the different numbers on the alternator as well as different pulley sizes on the engine and alternator. Calibration should be done using a light tach or another known reference for speed.

Product not compatible with '86-91 VW Vanagon's and other similar models

Unit measures 4" x 2.5" x 1" and is designed to be mounted inside a vehicle.