Ultrasonic Thickness Gauge (TM-8812)/Thickness Meter/thickness gauge/thickness tester Ultrasonic Thickness Gauge (TM-8812)/Thickness Meter/thickness gauge/thickness testerTM-8812Measuring range (metric/imperial): 1.2-225mm,0 ... measured: any hard materials, including steel, cast iron, aluminum, red copper, brass, zinc, quartz glass, polyethylene, PVC, gray cast iron, nodular ...