System Sensor 4WTA-B Photoelectric i3 Series Smoke Detector, 4-Wire, with Thermal Sensor and Built-In Sounder, White

Deliver consistent, code-ready fire detection and audible notification across commercial and institutional sites with the System Sensor 4WTA-B photoelectric combination detector. Designed for security and facility managers, this 4-wire smoke detector pairs a photoelectric chamber with an isolated thermal sensor to reduce false alarms while improving detection of smoldering and fast-developing fires. The integrated 85 dB piezo sounder ensures unmistakable local alerting, and the Form C relay supports easy integration into existing fire alarm, surveillance and building monitoring systems. Installation and upkeep are faster and simpler thanks to a plug-in base, Stop‑Drop 'N Lock attachment and remote maintenance signaling, while drift compensation and smoothing algorithms minimize nuisance events from dust or RF interference. With simplified sensitivity measurement and tamper-resistant mounting, the 4WTA-B helps meet code requirements and lowers lifecycle maintenance costs. Ideal for schools, offices, warehouses and mixed-use properties—specify the System Sensor 4WTA-B for reliable fire detection and streamlined monitoring. Contact us to order or integrate this detector into your security system.

• Reduces nuisance alarms with drift compensation and smoothing algorithms for reliable, maintenance-friendly protection
• Built-in 85 dB sounder and isolated thermal sensor provide clear local notification and dual-detection for faster, accurate response
• 4‑wire design with Form C relay enables seamless integration with commercial fire panels and security/monitoring systems
• Plug-in base with Stop‑Drop 'N Lock and tamper-resistant design speeds installation and prevents unauthorized removal
• Remote maintenance signaling and simplified sensitivity measurement streamline testing and code-compliance inspections