REFURBISHED UNIT: This is a refurbished unit that has been restored to like-new condition at the factory and carries a full 1-year warranty.

The ATS E50A Magneto Synchronizer is a modern redesign of the classic test instrument used by aviation mechanics around the world for over 50 years. It uses surface-mounted (SMD) micro-circuitry to eliminate the noisy vibrators, and heavy transformers of previous designs. The new technology of the E50A uses low voltage signals to measure the inductance of the magneto and precisely detect the moment the points break. And because it measures only pure inductance instead continuity, as with the older designs, then E50A can detect when the magneto has internal faults, such as a short or open circuit, thus greatly reducing the risk of a false reading. The ATS E50A is field-calibratable via the built-in Calibrated Test Point, making factory calibration unnecessary. It has an onboard battery monitor to warn you when your tester has unacceptably low power, which will again reduce the risk of false readings due to low power as with other testers on the market. And finally, the E50A is quiet - it only beeps when the points break. So, no more annoying "buzz-box" always screaming at you when you're trying to do a test.