YT102 Conventional Photoelectric Smoke Sensors SPECIFICATIONS Operating Voltage Range: 9 to 28VDC Volts Non-polarized Standby Current: ≤60µA @ 24 VDC Maximum Alarm Current (LED on: ) ≤30mA @ 24 VDC Operating Humidity Range: 10% to 93% Relative Humidity, Non-condensing Operating Temperature Range: 14°F to 120°F (-10°C to 49°C) Adjustable Sensitivity: 1.06±.26%FT. Height: 2.2˝ (55 mm) installed in Base Diameter: 4.0˝ (103 mm) Weight: 5.5 oz. (155 g)