Cooper MBD50R Conventional Reflective Beam Detector - 50m Range The Menvier range of zone powered reflective beam detectors are specifically designed to be compatible with the full range of conventional Menvier control panels. Two versions are available, the MBD50R with a range of up to 50 metres, and the MBD100R with a range of 50 - 100 metres. Both of these units are extremely simple to install, they require no separate power supply, operate on a reflective principle and have a simple set up mode to enable easy and quick alignment during installation. Beam detectors are designed to replace individual point detectors in large open areas such as warehouses. Fire and fault conditions are signalled to panel using standard zone wiring so no additional interconnection is required. In normal operation only one beam detector may be connected per zone, however special versions are available to work with external power supply if multiple beam detectors are required to be connected to a single zone