The NF-D443-22 is a surface mount optical sensor manufactured by lipoo. It is specifically designed for applications where high speed and precision performance is required. The device has a sensing range of up to 15mm and uses two infrared LEDs that are reflected off of opaque objects for detection. NF-D443-22 has an operating voltage of 3.0V and is RoHS compliant. It is built with integrated protection against ESD, reverse polarity, and short circuit, making it suitable for robust applications. Overall, this part is ideal for detecting edges, holes, and other dark or liquid surfaces.