Gent S4 711 Dual Optical Heat DetectorHoneywell Gent S4 711 S Quad Optical Heat Multi Sensor BS 5839 1: 2025 The S4 711 is a high performance multi sensor fire detector designed to minimise false alarms while maintaining exceptional fire detection accuracy. Combining optical smoke and heat sensing, it provides a reliable solution for challenging environments such as hotels, offices, and commercial buildings where standard detectors may struggle. Engineered as part of the Gent S Quad