EKMB & EKMC Saturn Lens PIR Motion Sensors Panasonic EKMB and EKMC Saturn Lens PIR (Passive Infrared) Motion Sensors are able to detect standard motion in outer areas and slight motion in center areas of space. The Saturn Lens PIR motion sensors may be used in private spaces and can detect movement in or out of a space as well as movement in the center of an area detecting even slight motion. The EKMB series offers low current consumption for battery-driven applications. The Panasonic EKMC series is an economy type that is ideal for a vast array of applications.