For 35 years, Essex Heavy Duty Keypads, Rugged Card Readers, Programmable Access Switches and Keyless Entry^® Access Control Systems have become the choice of security professionals worldwide.  Unlike traditional mechanical, membrane or conductive rubber keypads and switches, Essex products feature an advanced piezoelectric switching technology. Tested more than a Billion cycles, Essex switches are designed to operate in even the most extreme environment (heat, rain, snow or ice).