Conventional Smoke Detector,Two or four-wire model,Advanced detection and discrimination algorithm,Easy installation,maintenance
Product features
o  Two or four wire models
o  Advanced detection and discrimination algorithms
o  Easy installation and maintenance
o  Sleek low-profile housing design
o  SMD circuit board design-satisfactory quality and reliability guaranteed
o   N/C (normal/close) -N/O (normal/open) selectable relay output
o   AR (Auto Reset) function for security systems (optional for 4-wire models)
  Sensor specification:
o  Smoke sensitivity: 1.90, +/- 0.92%/FT obscuration (UL standard); 0.10 to 0.157dB/m (En-54 standard)
o  Ceiling spacing: 50-foot rating for heat sensor
o  Start-up current: 70uA maximum
o  Alarm impedance: for two-wire models: 100 Ohms +3V maximum; 560 Ohms +3V maximum (red LED open circuit)
o  Reset voltage: less than 1V
o  Reset time: less than one second
o  Alarm indicator: LED continuously emitting red light
o  Remote output: 15mA maximum, diode gate
o  Temperature range: -10 to 50 degrees Celsius
o  Permissible current: 80mA maximum at 13.8V
o  Humidity: 0 to 95% RH, no condensation or icing
o  Alarm contact: (for 4-wire) NO or NC operation, form A: 1.0A at 30V DC/0.5A at 125V AC
o  Dimensions (diameter x H): 100 x 46mm, with base  Weight: 130g/set, with base