SZM-3-type magnetic tachometer, the speed sensor and indicator composed of two parts, to distance measuring engine speed (transmission line sensors and indicators are not directional, the maximum length of 50M), can be used to measure a variety of vehicles, ships, printing , textile, construction machinery and various types of power equipment speed. The instruments need to be equipped with SZMB-7 or SZMB-8 type two kinds of sensors. A sensor can simultaneously drive the first two or three tables for two or three speed instructions.
