HCH gear sensor principle and characteristics: the use of steel materials (or other magnetic material) made gears, resulting change in magnetic flux, so the state to get a signal through the magnetic components, rotating gears measurable. Is characterized by high resolution, wide frequency response, strong anti-interference, high reliability. Stable output amplitude square wave signal, to achieve long distance transmission. Mainly used in the mechanical motion of the rotating physical transformation of a square wave pulse signals. Used for measuring speed, cycle and displacement. Widely used in electronic speed belt, said all areas of mechanical, chemical, transportation, automation, automobile, taxi price in mind, motorcycle engine speed. ("L" for low output, "H" for high output, "HL" for high and low output.)