The E39-RS2 is a digital proximity sensor manufactured by Omron. It is a cylindrical, flush-mount sensor that is designed to detect metallic objects, such as a ferromagnetic target, within a given range. It has a compact housing that is resistant to liquids, dust, and vibration and can be used in a variety of applications, including industrial automation, process control, and robotics. The E39-RS2 is made up of a DC-operated amplifier, a switching output circuit, and a ferrite-based sensing element. It features an adjustable sensing distance, adjustable time delay, and a durable, long-lasting design. Additionally, it is designed for easy installation and can be connected to virtually any system.