Capacitive sensors for object detection have a linear electric field. They detect solid objects such as wafers, circuit boards, cardboard boxes, stacks of paper, bottles, plastic blocks and plates as well as liquids through container walls or pipes made of glass and plastic (max. thickness 4 mm). Dimensions=Ø 30 x 87 mm, series=M30, thread (A)=M30x1.5, installation=flush, connection=plug connector, M12x1 connector, 4-pin, switching output=PNP normally open/closed (NO/NC) programmable, switching frequency=100 Hz, range=1...20 mm, sensitivity=adjustable switching distance, housing material=stainless steel (1.4301), active surface, material=PBT, ambient temperature=-30...70 °C, operating voltage Ub=10...35 VDC, approval/conformity=CEcULusWEEE, protection class=IP66