Smoke Sensors Dealers in North 24 Parganas

Greystone duct smoke detector  specifically the widely used  smoke inside HVAC/air duct systems and interface with fire alarm or building control systems.  Systems +1 Detector Type & Technology Sensor type: Photoelectric (light‑scattering) for smoke detection — good immunity to false alarms and sensitive to a wide range of smoke particle sizes.   Systems Wiring: 4‑wire conventional connection (power + alarm returns).  Systems Designed to be used only with a metal sampling tube installed in the duct.   Systems Airflow & Environmental Limits Specification DSD / DSD2G Series Air duct velocity range 100–4,000 ft/min (0.5–20.3 m/s)  Systems Operating Temp. –20°C to +70°C (–4°F to +158°F)   Systems Humidity Range 0–95% RH (non‑condensing