Place of Origin
Liaoning, China
Tested range of steel-bar diameter
diameter 6 mm~50 mm
Concrete cover thickness
6.-90,7-190mm
permissible error High range
7~79 80~119 120~190
permissible error Low range
6~59 60~69 70~90
Power supply
6 dry cells,work more than 30 times
Permissible error of diameter test
±1 grade
EMI
no Strong electromagnetic field