872C-M4BN12-FD02 - Proximity Sensor, 4-Wire DC Extended Range Complementary Output, 12mm Diameter, Tubular:Nickel Plated BrassRectangular, Standard, 4mm Sensing Distance, Shielded, Complementary N.O. & N.C., NPN, Pigtail (short cable with connector)

872C-M4BN12-FD02 - Proximity Sensor, 4-Wire DC Extended Range Complementary Output, 12mm Diameter, Tubular:Nickel Plated BrassRectangular, Standard, 4mm Sensing Distance, Shielded, Complementary N.O. & N.C., NPN, Pigtail (short cable with connector)