For the protection of larger, weather-exposed outdoor spaces, a detector is required that has environmental characteristics comparable to EXTERNAL PERIMETRIC PROTECTIONS, but which solves the need to determine detection not as a ‘curtain barrier’, but at a larger volume. 
The product capable of satisfying all these needs with state-of-the-art technological solutions is certainly the MASTER PLUS, a multi-beam, triple technology (dual IR and MW) detector, available in the two versions 12.8 PLUS and 12.8 PLUS AJ (for installations between 0.80-1.20m), and 21.23 PLUS (for installations between 2.10-2.30m