The E2B-M18KS05-M1-C1 is a part of Omron's E2B series of miniature inductive proximity sensors. This particular part is ideal for detecting objects and positions in small, difficult to access spaces, due to its NPN type, short sensing range of 5mm, and rectangular shape. The E2B series sensors offer precise response to a wide variety of target objects, superior noise immunity, vibration resistance, and an extended useful life cycle.