For contractors and fire safety professionals, the System Sensor D2 remains a standard for reliable detection within air handling systems. This 2-Wire InnovairFlex Photoelectric Low-Flow Duct Smoke Detector is engineered to operate across a broad air duct velocity range of 100 to 4,000 feet per minute, making it suitable for both high-speed supply ducts and low-velocity return air applications. Built on a modular platform, the InnovairFlex D2 features a pivoting housing that allows for versatile square or rectangular mounting configurations, effectively fitting into tight mechanical spaces. The unit’s 24Vdc power supply requirement and backward compatibility with existing Innovair accessories simplify field retrofits and new installations alike. Its photoelectric sensor head is designed for high false alarm immunity, ensuring that the system triggers only under genuine smoke conditions. This technical precision, combined with an expanded operating temperature range of -4°F to 158°F, allows for dependable performance in the harshest HVACR environments. Key Benefits for Technicians: Optimized Airflow Detection: Specifically designed for low-flow duct smoke detection, maintaining accuracy even in variable air volume (VAV) systems. Simplified Installation: Features a tool-less, patented sampling tube that clicks into place from the front or back of the detector housing. Advanced Diagnostics: Includes a cover tamper feature and improved LED status indicators for immediate visual verification of power, standby, and alarm modes. Flexible Connectivity: Outfitted with 3/4-inch conduit knockouts to provide extra wiring space for clean, code-compliant 2-wire duct smoke detector terminations. Common Questions: How do I test the System Sensor D2 in the field? The unit supports local testing via a magnetic switch or can be tested remotely using the RTS151 or RTS151KEY remote test accessories, which are fully backward compatible with this series. What duct sizes is this detector compatible with? The System Sensor D2 is compatible with ducts from 1 foot up to 12 feet in width, provided the correct length sampling tube (DST series) is selected and installed properly. Is the sensor head replaceable without removing the entire housing? Yes, the plug-in sensor head allows for rapid replacement or cleaning, significantly reducing downtime during routine maintenance cycles. This item is not eligible for free shipping. 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.
