System Sensor 4WTA-B White 4-Wire Photoelectric i3 Series Smoke Detector with Thermal Sensor and Built-In Sounder combines photoelectric smoke detection, fixed thermal sensing, and an integrated 85 dB sounder in a single intelligent device. Designed for simplified installation and maintenance, it features advanced drift compensation, remote maintenance signaling, and a plug-in design with included mounting base.

• Photoelectric smoke detection with isolated thermal sensor for enhanced fire detection capabilities
• Built-in 85 dB temporal sounder provides local audible alarm notification during emergency conditions
• Plug-in detector design with included mounting base enables fast installation and easy servicing
• Drift compensation and smoothing algorithms help reduce nuisance alarms caused by dust and environmental factors
• Form C relay, remote maintenance signaling, and dual-color LED status indicators simplify monitoring and troubleshooting