Electro Detectors Ltd are based in purpose built premises in Harlow, Essex in the UK. We pride ourselves on the quality and design of our products and the fact that they are manufactured and designed in the UK Formed in 1972 Electro Detectors manufacture and sell (through our network of distributors in the UK) advanced radio fire detection and alarm systems. Radio fire detection first became available in the early 1980′s. At that time there were many National Trust and English Heritage properties, as well as privately owned dwellings, that were desperately seeking an alternative to hardwired systems with all of the complications and disruption that such a system would bring. Since 1988 we have been producing radio fire alarm systems that are available throughout the UK, some parts of Europe and Scandinavia. We were the first company to release a radio sounder and the first company to manufacture a combined sounder/detector. Our systems are fully addressable and can provide cover for every application from a small private dwelling to a large commercial premises Our latest product the Zerio Plus is an EN54 Part 25 compliant system that has been designed to incorporate all of the benefits of the original Zerio System and lots of the more advanced features from our very popular Millennium range.