FIELD: building equipment, particularly measuring devices for macro- and micro-profile measurement on reclamation, road and other construction projects. SUBSTANCE: laser profilograph includes radiator, photodetector, photodetector motion meter and path sensor, which are connected to information processing means. Photodetector is arranged on vertically moving mechanism with drive. Vertically moving mechanism located on vehicle has body. Rod is located into body by guiders. Photodetector motion meter is formed as rheostat-type potentiometer, which has threads of high-resistance material and brush-type slide. Threads are fixed on body by insulators such that threads are arranged parallel to rod. Brush- type slide is located on lower rod end. Information processing means include analog-to-digital converter and controller connected by its inputs to analog-to-digital converter outputs and path sensor. One thread is joined to power source and common bus. Another thread is joined to analog-to-digital converter input by the first end thereof. EFFECT: increased operational reliability. 2 cl, 2 dwg
