Safety switch for monitoring a closing position of two parts which can be displaced in relation to each other

[Subject] The safety switch of the kind which can be managed with easier installation and few storage labors is offered maintaining a high safe level. [Solution means] The target safety switch has an actuator (16) and a sensor (18) especially for the thing for which the protection door on automatic equipment is monitored. An actuator (16) is equipped with an actuator antenna (56), and a sensor (18) is equipped with a sensor antenna (46). Actuator * (16) and the sensor (18) of each other are combined like especially a transponder like a transformer, when a protection door is in a closed position. According to one mode of the present invention, transformer coupling with at least two actuators [in / mutually / the perpendicular direction of space (64 66, 68) ] (16) becomes possible so that a sensor antenna (46) may have magnetic directional characteristics and may be seen from a sensor antenna (46) by that cause. [Selection figure] Fig. 2