ASAplus fire detection technology

Reliable fire detection is one of the most critical challenges in building safety. A fire detector must respond quickly and decisively to real fire events, while remaining immune to the wide variety of non-fire phenomena that occur in everyday environments, such as airborne dust, water mist, tobacco smoke, and other aerosols.

These two requirements are fundamentally in conflict: increasing sensitivity to fire inevitably risks reduced robustness to nuisances, and vice versa.

This white paper presents the detection principles and key advantages of the ASAplus technology for point-type fire detectors and why this technology represents a significant step forward in reliable, false-alarm-resistant fire detection.

What’s covered in this whitepaper

Physical principles of scattered-light fire detection

• Aerosol particles and fire detection
• Wavelength dependence: the role of blue and infrared light
• Angular dependence: forward and backward scattering
• Dimensionality of the discrimination space

The ASAplus detector optical design and discrimination performance

• Four scattering channels across two wavelengths
• How the four-channel optical design overcomes the limitations of single-dimension optical sensing
• The nature and limits of aerosol discrimination

Multi-criteria detection

• The role of dual heat detection in multi-criteria detection
• Independent evaluation and intelligent combination
• The design philosophy behind ASAplus technology signal processing

Learn the physical principles behind this design and explore detailed technical specifications, performance data, and the engineering insights that make ASAplus technology a significant advancement in fire detection.