Inductive proximity sensors, IQM, IQ04-1B5POKW2S, switching distance Sn: 1.5 mm, installation in metal: flush, cuboid shape (W x H x D): 8 mm x 16 mm x 4 mm, electrical design: DC 3-wire, switching output: PNP, switching function: normally closed, connection type: cable, 3-wire, 2 m