Hall Effect Crankshaft Position Sensor We've tested this with our 6.75" and 8.25" trigger wheels and we were able to get a rock solid reading at over 19,200 RPM, which is as fast as our test rig could spin the trigger wheel Runs off 5 to 24 volts, and gives a nice square wave so there's no variable voltage issues Has a 12 inch long, 3 wire pigtail