A shape memory alloy system suitable for use in any number of environments, including but not limited to latching and unlatching vehicle seat tracks. The pressure sensor further includes an outer casing holding the inner casing therein having a capsule header with a plurality of capsule header electrode pin channels defined therein which can include a ceramic seal disposed therein such that the capsule header electrode pin channels engage the electrode pins in an insulating sealed relationship. A concentration detector measures the total amount of light reflected from a surface. In another embodiment, a 2D transducer array is provided wherein elemental transducers are produced by dicing a conventional multilayer actuator to form equal sized elements which are embedded in a polymer matrix. In use, the processor is configured for conditionally preventing network traffic from accessing the computer from the network via the untrusted ports andor preventing unauthorized software from accessing the network in an untrusted manner from the computer. For example, the alignment elements may include hook-like elements that engage one another to define a distance of travel for switches in the switch arrays.