The E2A-M18LN16-M1-B2 is an inductive proximity sensor from the E2A Series manufactured by Omron. It is a shielded, self-contained inductive sensor that detects metal objects in close proximity, making it ideal for use in a range of applications including the detection of large metal parts, object presence detection and object detection from a distance. The sensor has an sensing range of 16 mm, and it has an external diameter of 18 mm. It also has a 3-wire connection with a built-in amplifier, as well as a built-in N.C. (Normally Closed) output contact and an LED indicator light. It is rated IP65, IP67 and IK10 for protection against dirt, moisture, and shock.