Airmodus: Advancing Ultrafine Particle Size Measurement

Airmodus instruments enable observation of particles at sizes previously inaccessible to conventional detection methods. The Particle Size Magnifier (PSM) represents a breakthrough in aerosol science, it enlarges nanoparticles as small as 1 nm in diameter to sizes detectable by condensation particle counters, effectively extending measurement capabilities down to molecular dimensions. This technology has been characterized and validated in over 50 peer-reviewed publications, establishing its credibility in atmospheric research, emission measurements, occupational health studies, and synthetic nanoparticle research.​

The company’s condensation particle counter lineup includes specialized instruments for distinct research needs. The A20 butanol-based CPC measures particle number concentrations, while the A23 CPC specifically targets vehicle exhaust measurements compliant with Particle Measurement Programme (PMP) standards. The A11 nCNC system (now discontinued) and its successor, the A12 nCNC, combine PSM technology with CPCs to measure total number concentrations of sub-micron particles and characterize the dynamics of particles in the 1–12 nm size range in real time.​

Why Choose Airmodus Instruments?

Airmodus instruments achieve detection capabilities extending below 1 nm under boosted temperature settings, surpassing competitive systems with detection limits around 1.4 nm. This capability matters for researchers studying new particle formation events, atmospheric nucleation processes, and industrial nanoparticle synthesis where the smallest size fractions contain critical information about particle origins and growth mechanisms.​

The product line addresses distinct measurement challenges across research domains. Airmodus nanoparticle neutralization and flow conditioning for CPC applications ensures accurate particle counting in complex aerosol environments. The AND nanoparticle diluter provides versatile aerosol dilution and sampling solutions designed specifically for particles starting from 1 nm diameter, enabling safe sampling from high-concentration sources without particle losses or artifacts.​

Standard operating procedures developed for Airmodus PSM and nCNC systems provide researchers with validated calibration, setup, and operation protocols. These instruments are designed for standalone continuous use in field campaigns and long-term monitoring stations, not just controlled laboratory environments. The A12 nCNC offers real-time characterization capabilities, providing immediate feedback on particle size distributions between 1-12 nm without lengthy post-processing.​

The PSM platform functions with almost all commercial CPCs, allowing researchers to integrate Airmodus technology into existing instrument configurations. However, online data inversion, providing immediate size distribution information, functions exclusively with the Airmodus A20 bCPC, offering a seamless measurement solution for those requiring real-time analysis capabilities.​

Airmodus positions itself as a preferred partner for aerosol measurements by combining specialized expertise in nanoparticle detection with practical instrument design informed by real-world research applications. Their instruments serve scientists confronting measurement challenges where conventional particle counters and analyzers cannot provide adequate size resolution or detection sensitivity.

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