Proximity switches are the most common solution for non-contact detection. And the inductive type is the widely used proximity switches, which is through the electromagnetic waves to detect the metal abject near the sensor detection surface. In application , this is a very simple technology to detect 1”~2”metal object . YUMO Electric offer different series proximity sensor , that included inductive, photoelectrical, capacitive and etc. YUMO Electric continues to improve the performance and quality , enabling the sensors in a world-class level . If you are searching for proximity switch , YUMO will be your best choice .