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This article contains results of a preliminary study of the parameters of the laser triangulation sensor in the context of its application to control of a technical condition of details of the car. The main aim of the study is the experimental determination of the limits of applicability of the sensor to monitor the real sample detail of the new design freight car on the example of 18-9855 bogie parts. By the experimental methods where established the threshold limits of applicability of the given sensor, its properties and application features for dimensional control. Also where established limit angles of the distance measurement at the maximum setting of the speed sensor, the actual focal point of the transducer. The analysis of the obtained data allowed authors to make an optimal scheme of automated measurement machine of portal type for control of the size and shape of parts of the car. The results of the work is possible to use when designing automated systems and equipment for dimensional inspection of parts during manufacture, repair and maintenance of railroad cars and other vehicles.