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Why Detection and devices (UL)?

Siemens fire detection technologies (UL) are your first line of defense in protecting people’s lives and your business. We set the standard for reliable detection and fast notification.

Explore the complete portfolio of Siemens fire safety detectors:

S-LINE detectors with ASAtechnology

  • Fire detector FDOOT441
  • Multi-purpose fire and CO detector FDOOTC441

C-LINE detectors

  • Multi-criteria fire detector FDOT421
  • Optical (photoelectric) smoke detector FDO421
  • Thermal detector FDT421
  • Input module FDCIO422

Advanced detectors with ASAtechnology

  • Fire detector OOH941
  • Multi-purpose fire and CO detector OOHC941

Standard detectors

  • Multi-criteria fire detector OH921
  • Optical (photoelectric) smoke detector OP921
  • Thermal detector HI921
  • Input module FDCIO422

UL-268 7th Edition Detectors FDA241 lithium-ion off-gas detector

Flame detectors

Beam detectors

Specialty detection technologies

A diagram showing the ISO technology with various icons and text.

Featured capabilities

ISOtechnology™ - Standard built-in Class X

Siemens is the first and only manufacturer to provide built-in isolation or ISOtechnology™ on all major fire system devices at no extra cost. This ensures better protection and survivability on all of your fire system devices.

Benefits:

  • Maximum protection against short circuits
  • Real-time reporting and identification of a wire short
  • Flexible, on-demand isolation
  • Increasing business continuity with superior protection

ASAtechnology™ and our No False Alarm Guarantee

When your building is protected by Siemens Advanced Signal Analysis—ASAtechnology™—detectors, we are proud to offer you our No False Alarm Guarantee. Our highly advanced technology detects smoke, heat, and carbon monoxide in any environment, without false alarms. 

We are confident in its ability to quickly identify fire emergencies that we will pay fines resulting from a false alarm triggered by these detectors.