Measuring range (metric/imperial): 1.0 to 200mm, 0.05 to 8 inchOperating principle: ultrasonicMaterials measured: any hard materials, including steel, cast iron, aluminum, red copper, brass, zinc, quartz glass, polyethylene, PVC, gray cast iron, nodular cast iron, and other materials Sound velocity: 500 to 9,000m/sLower limit steel pipes: ф15 x 2.0mm, ф20 x 3.0mm determined by the transducerCalibration block: includedResolution: 0.1mm (TM8812C 0.01mm)Accuracy: ±0.5%n + 0.1RS232C interface: with RS232C Power supply: 4 x 1.5V AAA (UM-4) batteryBattery indicator: low battery indicatorOperating conditions: 0 to +45℃ (32 to 104℉), ≤90% RHDimensions: 120 x 62 x 30mmWeight: 164g (not including battery)Optional accessories:

6MФ6mm thin material probe:
Measuring range (steel): 1.0 to 50.0mm Operating temperature: -10 to +60℃
5MФ12 high temperature probe:
Measuring range (steel): 1.0 to 225.0mm (normal temperature) Measuring range (steel): 4.0 to 100.0mm (high temperature) Operating temperature: -10 to +300℃