Retroreflective sensor RL28-54-G/76a/110/115 Detects transparent objects, like clear glass, PET, and transparent films TEACH-IN switch for setting contrast detection levels Automatic adjustment in case of contamination in contrast detection mode Ultra bright LEDs for power on, weak signal indication, and switching state Flashing power on LED in case of short-circuit Not sensitive to ambient light, even with energy-saving lamps Waterproof, protection rating IP67 Protection class II