With a laser instead of a manual reading level. Lasers laser beam telescope tube, making it along the axis direction of laser beam.

Laser monochrome and coherence, in front of the lens of the telescope Assembly has certain shading pattern piece of glass or sheet metal, the band plate, born of diffraction and interference. Through the telescope Focuser, zone plate's focusing range, get a bright and delicate cross-shaped or circular laser beam, which allowed more precisely target. Before and after the standard is equipped with an automatic tracking optical receiving target on the scale, you can carry out leveling. In construction measurement and Assembly of large structures, or horizontal line laser level to establish a horizontal plane.

Digital level is the most advanced level, with the special bar code leveling staff, through digital imaging system built into the instrument, automatic leveling bar code reading, eliminating the need for manual reading. This can greatly reduce the work intensity of surveying and mapping, artificially avoids subjective reading errors and improve the accuracy and efficiency.