System Sensor 4WT-B 4-Wire Photoelectric Smoke Detector with 135° Thermal Sensor

Overview

The System Sensor 4WT-B is a four-wire, 12/24 VDC powered photoelectric smoke detector designed for dependable detection in commercial and institutional spaces. With a built-in 135° fixed thermal sensor and drift compensation algorithms, this i3 smoke detector emphasizes consistent performance without relying on battery backup. It features a clear red LED indicator for quick status checks and includes a base for straightforward installation.

Key Benefits at a Glance

• Four-wire, 12/24 VDC power supply provides steady operation and simplifies wiring in new or retrofit projects.
• Photoelectric detection paired with an i3 sensor platform for sensitive, rapid response to smoke in typical environments.
• Built-in remote maintenance signaling helps facilities monitor detector status from a central point.
• Drift compensation and smoothing algorithms reduce false alarms and improve signal stability over time.
• 135° fixed thermal sensor adds an additional layer of awareness for heat events, enhancing coverage in larger rooms or corridors.
• Red visual alert clearly communicates detector status to occupants and staff on-site.
• Removable detector cover and chamber simplify inspection and service without full removal.
• Includes base for secure mounting and quick alignment during installation.
• UL and CSFM listed with country of manufacture in the United States, meeting common safety and compliance expectations.
• Operating range 32°F to 120°F supports common climate conditions found in many facilities.

Installation and Real-World Use

Ideal for hallways, lobbies, and workspaces where reliable early smoke detection is valuable. The 4WT-B’s four-wire design supports clean integration into existing control panels, while its remote signaling capability helps maintenance teams monitor detector health without entering sensitive areas. The removable cover and chamber streamline routine servicing, reducing downtime during inspections.

Environment and Standards

Designed to function across typical building temperatures and operated without an internal battery back-up, this detector relies on a dedicated 12/24 VDC supply. It aligns with UL and CSFM requirements and is manufactured in the United States, underscoring its suitability for professional installations that demand consistent performance and compliance.