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Siemens OP921 Photoelectric Smoke Detector

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Siemens OP921 Photoelectric Smoke Detector

Key Features:

  • Microcontroller circuitry and surface-mount technology for reliability
  • Tri-color LED indicator for status indication
  • Field-selectable sensitivity profiles
  • Remote sensitivity measurement capability
  • Dust-resistant chamber
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Photoelectric Smoke Detection:

  • Utilizes a light-scattering principle with an infrared LED and photodiode
  • Designed to detect a broad range of smoke types

Intelligent Features:

  • Addressable, allowing for precise location identification within a fire alarm system   
  • Advanced microprocessor-based signal processing for accurate detection and reduced false alarms   
  • Automatic environmental compensation
  • Self-testing capabilities
Manual Manual

Electrical:

  • Input Voltage: 16VDC to 30VDC

Environmental:

  • Operating Temperature: 32°F (0°C) to 120°F (49°C)   
  • Relative Humidity: 0 to 95% (non-condensing)
  • Air Velocity: 0 to 4,000 feet per minute (fpm) (0 to 20 meters per second)

Physical:

  • Design: Low-profile plastic housing
  • Uses DB-11 series mounting bases

Standards and Approvals:

  • UL 268A Listed (for air duct use)
  • ULC Listed
  • FM Approved
  • CSFM Approved.
  • Complies with NFPA 72

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