The MK11 Reed Sensor is a 5mm threaded cylindrical, Form A, Single Pole, Single Throw, Normally Open (SPST-NO), and rated at 15 to 20 AT. The MK11 Series Reed Sensor is in a 5mm cylindrically shaped housing with cable terminals. Used in position, proximity, motion, level, and end limit sensing. Available with Optional internal switch, cable, length, and termination.