Sensor Products” Pressurex is a tactile pressure-indicating sensor film that is designed to quickly and accurately measure surface pressure distribution and magnitude between any mating or contacting surfaces. In gasket and o-ring seal assemblies, it profiles interfacial contact, showing precisely how surfaces engage and deform under stress to create sealing flaws and inconsistencies. In hydraulics and pneumatics, it improves fluid power by diagnosing current and potential leakage areas in fittings, couplers, and connectors. Pressurex comes in the form of a thin flexible plastic sheet, physically similar in appearance to paper. It detects surface pressure from 2 PSI up to 43,200 PSI (0.14 to 3,000kg/cm2 ). When subjected to pressure, it instantaneously and permanently changes color. This color change is directly proportional to the actual pressure applied. Precise pressure magnitude is determined by comparing the resultant color intensity to a color correlation chart (conceptually similar to interpreting Litmus paper).