LPCB approved to EN 54-3, EN 54-17 and EN 54-18, our Loop Sounder System greatly increases the reliability of the sounder circuits and in many cases results in a saving in the amount of cable used in field wiring. Each loop can accommodate up to 45 sounders. Suitable for use on both conventional and addressable fire alarm systems, the system provides much greater protection against faults than the 'dual radial' circuit arrangements commonly used.