标准裂纹规

Crack gauges can be used to monitor horizontal or vertical movement across a crack on a flat surface. The H-2936A standard crack gauge is a precision device that consists of two plates, which overlap for a part of their length. The bottom plate is transparent and marked with a hairline cursor in the form of a cross. Can be fixed to the surface with screws or adhesive (not included). Supplied with instructions and record sheet.