FIELD: automatic control and measurement technology; measuring speed and load parameters of various motors. SUBSTANCE: tachometer has series-connected contactless sensor, signal amplifying circuit, regulating circuit, microprocessor with digital display, signal shaper whose first input is connected to regulating circuit output and second input, to induction motor supply mains, and shaper output is connected to microprocessor bit input whose bit output is connected to complementing input of amplifying circuit. EFFECT: improved design. 1 dwg
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