The E2E-S04SR8-WC-B1 2M is an Omron Double-Ended Inductive Proximity Sensor, designed to detect metal objects without physical contact, such as paper and plastic cans, as well as metal boxes, plates and covers. It has an detection range of 2mm, a sensing object diameter of 8mm, and an output signal of NPN normally closed. The operating temperature range is -25 to +85C and it has a rating of 10 to 30VDC and 100mA max. The total cable length is 2m and the 2 wires come with M8 male straight connectors. It is protected against dust, water, and oil and is safe to touch after installation.