System Sensor 2WTA-B Photoelectric i3 Series Smoke Detector, 2-Wire with Thermal Sensor and Built-In Sounder, White

Deliver dependable, code-compliant fire detection where it matters most. The System Sensor 2WTA-B photoelectric i3 series smoke detector combines a sensitive photoelectric chamber with an isolated thermal sensor to detect smoke and heat early while minimizing nuisance alarms. Designed for contractors and facility managers, the 2-wire detector features a plug-in base with large wire entry and in-line terminals for faster, neater installations and Stop‑Drop 'N Lock head attachment for instant inspection and replacement.

Built-in features that protect your operations include an 85 dB audible sounder for local alerts, a Form C relay for system integration, and drift compensation plus smoothing algorithms to reduce maintenance. The unit supports remote maintenance signaling and simplified sensitivity measurement to streamline monitoring and service workflows. Powered at 24V DC and finished in white with a low-profile ceiling-mount form factor, the 2WTA-B is ideal for schools, offices, retail, healthcare and other commercial security environments.

Specify the System Sensor 2WTA-B for reliable fire detection and easier installation—contact sales to add it to your project or order today.

• Faster, cleaner installs with the plug-in i3 base and Stop‑Drop 'N Lock design, reducing labor time and on-site errors
• Dual-photoelectric + isolated thermal sensing reduces nuisance alarms while delivering reliable, early fire detection
• Built-in 85 dB sounder and Form C relay provide immediate local alerting and seamless integration with conventional security panels
• Advanced drift compensation, smoothing algorithms and remote maintenance signaling cut service calls and simplify monitoring
• 2-wire design and in-line terminals support retrofit and new construction for commercial security and fire monitoring systems