Make sure this fitsby entering your model number. Type of ray: Infrared light modulation This curtain sensor are special designed for automatic sliding door to detection and keep safety.High accuracy Advanced infrared scanning technology.Stable and reliable Have function of background self-learn.Can learn background auto-matically when power on.Suit all kinds of occasions Always self-correcting once be influenced by quake,distortion,move,dark and sunshine.Ensure the sensor can work durable