... materials including steel, cast iron, aluminum, red copper, brass, zinc, quartz glass, polyethylene PVC, gray cast iron, nodular cast iron ... status;Auto sleep and auto power off function to conserve battery life. Function1. Applicable to measure the thickness of any ... when the result value exceeding the limitPower SourceTwo “AA” size, 1.5 Volt alkaline batteries. 100 hours typical operating ...