Zytronic PCT touch sensors, are constructed with an XY matrix of ultra-fine (10μm diameter) copper capacitors embedded into a durable laminated glass substrate. Unlike conventional resistive and surface capacitive touch sensors, the technology is effectively invulnerable to all forms of mechanical stress (scratches, impacts, vibrations, etc.), as well as extreme temperatures and harsh chemicals. In addition, while optical, infrared (IR) and surface acoustic wave (SAW) touch technologies usually depend on the inclusion of a bezel, in which the transmitting/receiving electronics are housed, PCT touch sensors support smooth-fronted, edge-to-edge glass designs. This means that the high levels of hygiene critical in medical applications are much easier to maintain, as there are no recesses in which dirt and germs can be trapped. The touch sensors also have the advantage of being able to detect touch through a glove – and notably in this application – even when the glove is made of latex or rubber.