Housed in 316L stainless steel rated to IP67, IP68, and IP69K, Q4X Series includes both analog and discrete models. With sub-millimeter distance change capability, analog model measures height and fill levels, complementing presence or absence capability of discrete model. Teach mode has been added to discrete sensor, enabling detection of clear objects without need for retroreflector. Discrete sensor can also determine whether object is present at correct distance and if object is correct.