Crack microscope is a high definition device which is used for measuring crack widths both in concrete and other structures like masonry walls. Consists of an adjustable lamp unit and a knob for focusing the image. The 360° turning ability of the eyepiece enables the alignment with the direction of the crack or pitch subject to examination. The battery operated microscope has 40x magnification and 4 mm measuring range with 0.02 mm subdivisions.