Aerosol Neutralizers

Accurate aerosol measurements start with well-conditioned particles. Neutralizers help shift particle charge distributions toward a near-Boltzmann equilibrium, which supports mobility classification and improves comparability across instruments and labs. TSI neutralizers integrate seamlessly with classification and counting systems for a dependable measurement chain.

Applications:

• SMPS and DMA-based sizing workflows
• Optical particle counter correlation and response studies
• Filtration efficiency testing with better charge control
• Calibration and verification campaigns across multiple sites
• Environmental chamber work and source characterization

Technical Benefits:

• Equilibrium-Like Charge States: Supports assumptions used by mobility sizing and many data reduction methods.
• Broad Compatibility: Connects easily with aerosol generators, DMAs, CPCs, OPCs, and impactors.
• Technology Choices: Soft X-ray and other methods allow alignment with facility policies.
• Stable, Reproducible Conditioning: Helps reduce variability in downstream measurements.

Best Practices:

• Place the neutralizer between the generator and classifier for maximal impact on sizing accuracy.
• Verify charge conditioning by comparing mobility-based data sets across runs.
• Maintain flow and residence time within recommended ranges for consistency.
• Document neutralizer type and settings in reports to support peer review.

Selection Considerations:

• Technology preference and regulatory context
• Flow rate and concentration range
• Integration with existing SMPS/OPC/CPC systems
• Maintenance schedule and consumables

Outcome:
Aerosol neutralizers support data quality, enabling more reliable sizing, better cross-instrument alignment, and clearer research conclusions. TSI can help you choose the right neutralizer for your flow rates, measurement methods, and lab policies.