Performance：

 -  Operation Temperature：-40^oC ~ 135^oC　

 -  Range：0~4kHz

 Function：

 -  Being installed inside the automotive gear-box to measure the vehicle speed, signal being   used on the speed display   and the engine fuel control

Merit：

-  Robust to the air-gap variation

-  High reliability, long life span, applicable to the atrocious working environment of the automotive system