The Patrol sounders (PA 1 – PA 20) combine innovative design with powerful audible performance for reliable warning and alarm signaling in demanding environments. With sound pressure levels from 105 dB(A) up to 120 dB(A), these sounders ensure optimal coverage for fire alarm, gas detection, explosion-hazard and industrial signaling applications.

All Patrol models feature robust, impact-resistant housings, quick installation and a wide selection of tones for maximum flexibility. The series is certified according to EN 54-3, and selected versions are available with additional approvals such as UL, VdS, GL or MED/MER for marine and international use.

Together with Pfannenberg’s 3D-Coverage planning method and advanced design tools, Patrol sounders enable effective, compliant and cost-efficient alarm system design.