*Shorten the time of maintenance by changing the body *Improve the noise resistance by adopting dedicated IC (DC 3-wire type) *Built-in protection circuit of reverse power polarity(DC) *Built-in surge protection circuit(DC/AC) except for PS12 type *Long life span, high reliability with simple operation *Available to check the status of operation by Red LED indicator *Waterproof structure by IP67(IEC standard) *Wide range of applications for replacement of micro switch, limit switch