ASD - aspirating smoke detection

Invisibly efficient

Aspirating smoke detectors continuously draw air samples from the areas requiring protection and evaluate them for the presence of smoke. They ensure reliable fire detection in demanding application areas, where earliest possible fire detection is essential and business continuity is paramount.

Download our white paper on aspirating smoke detection to find out more about the underlying technological benefits.

ASD white paper

Product information The aspirating smoke detectors FDA221 and FDA241 from Siemens use two wavelengths to differentiate between smoke and deceptive phenomena. This enables increased detection reliability even in the most demanding environments. In addition, FDA221 and FDA241 can be directly integrated into a fire protection system from Siemens.

Intelligent classification of airborne particles

The optical detection technology uses two wavelengths – blue and infrared. This enables FDA221 and FDA241 to detect smaller airborne particles produced in the earliest stages of overheating or as found in open fires. By determining the size and concentration of the airborne particles, the detectors differentiate between smoke, dust and steam. This results in greater detection reliability and a high immunity to deceptive phenomena which prevents downtimes and costs caused by false alarms.

For applications from clean to harsh

FDA221 covers an area of up to 500 m² with a programmable sensitivity range of 0.14 – 20%/m. FDA241 covers up to 800 m² with a programmable sensitivity range of 0.03 – 20%/m. The detectors offer up to three modes of operation: ultrasensitive, auto-discrimination and robust. Furthermore, an alarm threshold can be defined and programmed.

FDA241 additionally offers a programmable purge functionality as well as a programmable 4 – 20 mA remote output that is able to display smoke and airflow rate. This makes the detectors ideal for challenging applications.

Easy installation and integration

FDA221 and FDA241 are designed for easy out-of-the-box installation. They can be installed directly onto the detector loop of a fire protection system from Siemens. Because all detectors and peripherals share the same loop, less cabling is needed.

Low maintenance and long product life cycle

The patented chamber inside the detectors was specially designed to keep dust ingress to an absolute minimum. For applications with high airborne dust concentrations a VdS-certified filter cartridge is available. The benefits include an extended product lifespan and less maintenance – even if the detectors are installed in dusty and dirty environments.

Application areas Aspirating smoke detectors are primarily used in areas where point detectors cannot, or have a limited usage. These include inaccessible or restrictive areas like operating rooms, invisible detection in historical buildings, concealed detection e.g. in metro stations, parking garages or prisons.