The Omron E3Z-LL83 2M is a type of fiber optic light sensor that is designed to detect the presence of objects. It can be used to detect objects with a wide range of shapes, materials, and sizes. This sensor is available with a variety of different mounting styles, such as panel mount, wall mount, and others. It features a high-speed response time of 0.2ms, a compact size of just 36 x 12.4 x 22 mm, and a tubing length of 2 m. It is waterproof and resistant to oil, dust, and residuals from welding making it suitable for use in a variety of industrial environments.