display resolution:0.1mm
range of measuring :1.2~225.0mm(normal temperature) 5.0mm~80.0mm(steel,high temperature)
tube material measuring lower limit:Φ20mm×3.0mm(steel,normal temperature) display resolution:0.1mm
measuring accuracy:±(1%H+0.1)mm H velocity of sound regulating range:1000m/s~9999m/s