The EverSwitch Touch Metal technology is based on stand-alone piezoelectric modules that can be arranged in a myriad of configurations from individual switches to multi-function switch panels and keypads. The technology uses the piezoelectric effect (the property exhibited by certain crystals that generate voltage when subjected to pressure) to create switches and keypads that are completely sealed, impervious to the environment and operate from -40 to +125ºC. These individual modules (or PC Boards with and array of modules) are press-fit into a solid metal housing, so that when pressed, the piezoelectric crystal material produces a corresponding change in voltage, which passes through a conductive connecting material to a circuit board mimicking a dry-contact switch closure.
This patented, modular approach eliminates the need for a solder connection to the delicate piezo ceramic and creates a robust 125msec minimum switch closure, which is a significant improvement over market standards of just 20msec. With no moving parts, EverSwitch products last indefinitely even in the most extreme operating conditions as switch failure due to motion, friction, dirt, moisture, vandalism or ice are completely eliminated.