C&K has many options for both physical and non-contact sensors used for intrusion alarms. For physical contact sensors, C&K offers various options including the PTS635, KSC4D, and KMR series tact switches, as well as the HDT series of detect switches. These options provide a variety of footprints, operating forces, and operating cycles to fit any customer requirement. For magnetic sensing, C&K provides the MPS line of proximity sensors which are fully sealed and operate up to 4 million cycles.