Retroreflective sensor RLK28-54-G/31/116 RLK28-54-G/31/116 Detects transparent objects such as clear glass, PET and transparent films TEACH-IN switch for setting contrast detection levels Automatic adjustment in case of soiling in contrast detection mode Ultra-bright LEDs for power on, weak signal indication and switching condition Not sensitive to ambient light, even with switched energy-saving lamps Waterproof, protection degree IP67 Protection class II