Sensor with safety device e.g. for protecting sensors in printing machines with high level of contamination, has safety device which covers sensitive surface of sensor field of view

摘要

The sensor (01) has a safety device (02). The safety device covers a sensitive surface of the sensor field of view. The safety device has a section length for the signals of a permeable protection material, which can be detected. The safety device provides several alternative section lengths into the field of view of the protection material. The protection material is designed as protective strip, which on its length has several covered corresponding section lengths.