Intelligent Optical Smoke Detector

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  • Factory New
Brand: EST FireAlarm.com Part #: 026418 Categories: , , Manufacturer Part #: SIGA-OSD Tags: ,


The Signature Optica Series SIGA-OSD smoke detector brings advanced optical (photoelectric) technology to a practical design that increases efficiency, saves installation time, cuts costs, and extends life safety and property protection capabilities. Continuous self-diagnostics ensure reliability over the long-haul, while environmental compensation helps reduce maintenance costs.

Like all Signature Optica Series detectors, the SIGA-OSD is an intelligent device that gathers analog information from multiple optical sensors, converting this data into digital signals. Utilizing dual optical wavelengths combined with multiple detection angles, the SIGA-OSD differentiates particles that are not representative of actual smoke. Particle data is input into digital filters which feed a series of ratios removing signal patterns that are typical of nuisance sources, thus reducing unwanted alarms. To make an alarm decision, the detector’s on-board microprocessor measures and analyzes all optical sensor readings and compares this information to preprogrammed settings.


Weight 0.40 lbs
Dimensions 2.30 × 4.30 × 4.30 in





Detectable Medium


Detection Method



  • Multi-criteria optical smoke sensing technology
  • Wide 0.5 to 4.36 %/ft. (1.6 to 13.6 %/m) smoke obscuration
  • Uses Existing Wiring
  • Integrated nuisance rejection reducing unwanted alarms from general cooking particulates
  • Listed to UL 268 7th edition
  • Automatic Device Mapping
  • Up To 250 Total Signature Addresses Per Loop
  • Two Levels of Environmental Compensation
  • Two Levels of Dirty Detector Warning
  • Twenty Pre-Alarm Settings
  • Five Sensitivity Settings
  • Non-Volatile Memory
  • Electronic Addressing
  • Automatic Day/Night Sensitivity Adjustment
  • Bicolor (Green/Red) Status LED
  • Standard, Relay, Fault Isolator, and Audible Mounting Bases
  • Sensor Markings Provide Easy Testing Identification

Note: Some features described here may not be supported by all control systems. Check your control panel’s Installation and Operation Guide for details.


Intelligent Smoke Detector; SIGA-OSD
Edwards – Data Sheet
SIGA-OSD Intelligent Optical Smoke Detector
Edwards – Installation Sheet


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