The MK18-C-100W Reed Sensor is a panel mount, Form A, Single Pole, Single Throw, Normally Open (SPST-NO), and rated at 15 to 20 AT. The MK18 Series Reed Sensor is in a 5.0mm cylindrically shaped housing with cable terminals. Used in position, proximity, motion, level, and end limit sensing. Available with an optional internal switch, with cable, length, and termination options.