UMA electronic aircore propeller tachometers connect to a tach coil calibrated to the proper rather than engine RPM. These instruments are available in 3-1/8 inch, 2-1/4 inch, and 1-1/4 inch sizes.This UMA electronic tachometer (EDMO# T19811-101) is 3-1/8 inch, designed for 4 cylinder Continental/Lycoming engines, has a built-in hourmeter, and comes with a magneto sensor with a 6 foot lead.
