With these non-contact protective devices, a protective field composed of infrared beams is emitted by the transmitter and evaluated by the receiver. In the case of the SLC/SLG 445, multiple scanning evaluates each infrared beam six times in succession within the reaction time. 

Due to the multi-scan function for the prevention of interferences, the SLC/SLG 445 product series is also suitable for areas of application with high contamination, such as wood or stone processing, outdoors where there are insects and birds, or for work areas in which water vapour and splash water are commonplace, such as in food processing. 

The series also features integrated muting function, which distinguishes between human and material and hence also contributes to increased productivity.