*Improve the noise resistance by adopting dedicated IC(DC 3-wire)
*Built-in protection circuit of reverse power polarity(DC 3-wire)
*Built-in surge protection circuit
*Built-in over current protection circuit(DC type).
Except for PR08 type.
*Long life cycle, high reliability with simple operation
*Available to check the status of operation by Red LED indicator
*Waterproof structure by IP 67
*Wide range of applications for replacement of micro switch, limit switch.