The York SL-2000-P Duct Smoke Detector is a photoelectric-type air duct smoke detector designed to detect smoke and initiate control functions in HVAC systems. Built for reliable and early smoke detection, it helps prevent the circulation of smoke through air handling ducts by triggering system shutdown or alarm activation. This model is supplied without a sample tube, allowing flexibility to select the appropriate tube length for your installation needs. Key Features: Photoelectric sensing technology for fast and accurate smoke detection. Designed for air duct applications in commercial and industrial HVAC systems. No sample tube included ? choose the correct size separately for your duct. Compatible with most control panels and HVAC interlocks. Ensures safe air circulation and early warning of fire or smoke events. Specifications: Part Number: SL-2000-P Type: Duct Smoke Detector (Photoelectric) Detection Method: Photoelectric sensing chamber Includes: Detector housing and cover (no sample tube) Power Supply: Compatible with HVAC control systems Application: Commercial HVAC ducts, air handling units, and ventilation systems Function: Detects smoke in air ducts to trigger alarms or shutdowns Compatible Models: (Not model-specific ? suitable for a wide range of York and compatible HVAC systems using duct smoke detection assemblies.) Why Choose This Item: The York SL-2000-P Duct Smoke Detector ensures safe and compliant operation of your HVAC system by providing dependable smoke detection and system response. Its photoelectric design offers superior sensitivity to smoldering fires, while its modular setup and compatibility make it a trusted choice for both new installations and replacements in commercial environments.