Ketos Ring is intended to be a total system check for your DC output equipment. This test gauge with subsurface discontinuities is an excellent tool that provides a quick way to confirm overall performance of your DC output machine. The Ketos Ring is meant to be a quick overall system performance indicator. The ring is to be processed by the continuous method using a 1-inch diameter central conductor. When properly processed, indications of artificial subsurface discontinuities will be produced on the circumferential surface of the ring. The number of indications produced is the function of magnetizing current amperage and the characteristics of the indicating medium.