In LCD, Scrolling arrows offering the possibility of operating on all contrast with an operating distance of 9mm max between sensor & web. Specification : Model : TLU 011 Sensor Type : Photo electric Minimum spot dimension : 1.5x5mm/2x7mm Ripple : 2VPP Max Response Time : 50μs MAX Switching Fquency : 10+20KHz Input : 10-30VDC Output : 0-5.5VDC Material which can Be Detected : Detection of transparent material, Detection of opaque material, Edge detection, line detection