Detection and devices (UL)

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

Built-in ISOtechnology

Siemens is the first and only manufacture to provide built-in isolation technology on all major fire system devices at no extra cost, ensuring better protection and survivability on all of your devices.

No False Alarm Guarantee

Our advanced ASAtechnology intelligently detects smoke, heat, and carbon monoxide in any environment. We are so confident in this technology that we will pay any fines that result from a false alarm triggered by these detectors.

Business continuity and reliability

Faster troubleshooting and maintenance enable superior protection, while real-time reporting minimizes system downtime and maximizes reliability.