Zymax is based in the United Kingdom specialising in the design and manufacture of lightning and surge protection devices (SPD, TVSS). We have devices for the protection of: AC Mains power, DC Power Supplies, CCTV, Load Cells, Aerial/antenna and Co-Ax, Telecom PSTN, RS485 and more. The Zymax Mains protection range incorporates our unique MMOV (Monitored Metal Oxide Varistor). This is patented technology that continually monitors the actual ageing (the protective state) of the ZM devices primary protectors. Some of our barriers also allow for preventative maintenance - for instance our ZM mains power surge protection range: 1. Alerts user to incorrect wiring (phase reversal & bad earth connection). 2. Alerts user by alarm and LED (when the device needs or is nearing replacement). We hope to be able to help you whatever your application.