Photoelectric Smoke Detector SD-651 & B401 Notifier by Honeywell

Photoelectric Smoke Detector SD-651 amp; B401 Notifier by Honeywell Specifications - Operating Voltage/Alarm Current: B401 Nominal Voltage: 12/24 VDC; Current Draw: 10-100 - Standby Current: 85μA Standby - Sensitivity: 1 - 3.18%/ft. - Height: 2.0” in B401 - Diameter: 4.1” installed in B401 - Shipping Weight: 5.2 oz = 147.8 g - Construction: Flame retardant thermoplastic - Temperature: Photo: 32°F to 120°F (0°C to 49°C) - UL Listed Velocity Range: Photo: 0–3000 fpm (0–15.2 m/s) - Humidity Range: 10%–93% RH non-condensing - Smoke Detector Spacing: On smooth ceilings (as defined in NFPA 72), spacing of 30 feet (900 sq. ft.) may be used as a guide. Other spacing may be used depending on ceiling height, high air movements, and other conditions or response requirements