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Smoke Detectors

2251B Intelligent Photoelectric Smoke Sensor

2251B intelligent photoelectric smoke sensors are plug-in type smoke sensors that combine a photoelectronic sensing chamber with addressable-analog communications.

2251B Intelligent Photoelectric Smoke Sensor

2251B intelligent photoelectric smoke sensors are plug-in type smoke sensors that combine a photoelectronic sensing chamber with addressable-analog communications. The sensors transmit an analog representation of smoke density over a communication line to a control panel. Rotary switches are provided for setting the sensor’s address. Two LEDs on the sensor are controlled by the panel to indicate sensor status. An output is provided for connection to an optional remote LED annunciator.

Features & Benefits:
  • Sleek, low-profile design
  • Analog communications
  • Low standby current
  • Rotary address switches
  • Superior EMI protection
  • Dual LEDs for 360° visibility
Certifications:
  • AHJ
  • NFPA 72

Others

  • Maximum Standby Current
    • 300 µA
  • Detection Sensor Type
    • Photoelectric
  • Conventional or Addressable
    • Addressable
  • Maximum Operating Humidity
    • 93 Percentage
  • Minimum Operating Humidity
    • 10 Percentage

Others

  • Maximum Standby Current
    • 300 µA
  • Detection Sensor Type
    • Photoelectric
  • Conventional or Addressable
    • Addressable
  • Maximum Operating Humidity
    • 93 Percentage
  • Minimum Operating Humidity
    • 10 Percentage
  • Maximum Standby Current : 300 µA
  • Detection Sensor Type : Photoelectric
  • Conventional or Addressable : Addressable
  • Maximum Operating Humidity : 93 Percentage
  • Minimum Operating Humidity : 10 Percentage