For over 30 years, Essex Heavy Duty Keypads, Door 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, only Essex products feature an advanced piezoelectric switching technology. Tested more than a Billion cycles, Essex switches are unsurpassed in their ability to tolerate any environment (heat, rain, snow or ice 3/8"). Professional Grade Keypads, Switches, Keyless Entry Access Control systems proudly designed and manufactured in the USA.