The NJ-D4 is an electronic part with Optical Sensors by Lipoo. It is compliant with RoHS standards and is designed for industrial applications. The part includes two optical sensors that can detect the presence of objects, and the sensitivity can be set for different ranges. It has a wide working voltage range of 6 – 18 VDC and is built with strong SMT construction. The part is waterproof and can withstand temperatures from -20°C to +55°C. It can be painted or surface-treated depending on the application, and can be used in a variety of industrial applications, such as in traffic control, manufacturing environments, medical applications, and more.