Most storage devices that do not require vision and a brain to read data fall into this category. Electromagnetic data may be stored in either an analog data or digital data format on a variety of media.
Direct Tripwire Alarm - The wire placed across the path is directly connected with the cord, wire or string placed across the particular path. Laser Tripwire Alarm - An invisible laser, typically an infra-red, is used instead of a cord or string.
Rosen Guidewire - The Rosen Guidewire is a curved wire used for angioplasty catheter exchange. Intermediate stiffness with tight J tip allows wire to be stiff all the way to the end while at the same time minimizes risk of distal wire injury. Ideal for vascular intervention.