The System Sensor 2W-B is a professional-grade 2-wire photoelectric smoke detector designed for seamless integration into conventional 12/24V fire alarm systems. As part of the high-performance i3 Series, this detector utilizes advanced photoelectric sensing technology to provide accurate detection of smoldering fires while minimizing nuisance alarms through onboard drift compensation and smoothing algorithms. For the technician, the plug-in design and included mounting base streamline the installation process, allowing you to pre-wire the base and secure the head with a simple "Stop-Drop ’N Lock" action. This unit is engineered for non-polarized operation, simplifying field wiring with SEMS screws and in-line terminals that accommodate 14–22 AWG wire. With a standby current of only 50 µA and a wide-angle dual-color LED for instant status inspection (green for standby, red for alarm), the System Sensor 2W-B ensures long-term reliability in commercial and residential applications. When paired with a 2W-MOD2 maintenance module, it supports remote maintenance signaling and the EZ Walk loop test, enabling rapid circuit verification without individual device testing. Key Benefits Simplified Installation: The plug-in detector line includes a universal mounting base compatible with single-gang, 3.5-inch, and 4-inch octagonal back boxes. Intelligent Performance: Built-in drift compensation automatically adjusts sensitivity over time to account for dust accumulation, reducing service calls. Instant Inspection: High-visibility dual-color LEDs provide immediate visual feedback on power-up, normal operation, and out-of-sensitivity conditions. Field Maintenance: Features a removable cover and insect screen, allowing for easy cleaning without specialized tools. Broad Compatibility: Fully listed for use with 12/24V DC conventional panels and works with standard initiating device circuits (IDC). Common Questions Is the 2W-B compatible with my existing fire panel? This 2-wire smoke detector is compatible with most conventional panels supporting the 12/24V i3 protocol; always check the manufacturer’s compatibility identifier on the back of the device. Does this unit require a separate mounting base? No, the standard mounting base is included in the box for immediate deployment. How do I test the sensitivity in the field? You can use the SENS-RDR wireless reader to measure sensitivity in percent-per-foot obscuration without removing the detector from the ceiling. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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