Aerosol Charge Neutralizer Model 9000


A charge neutralizer that provides reproducible bipolar charge distributions in a very affordable & easy-to-maintain package.

The charge neutralizer produces a reproducible, bi-polar equilibrium particle charge distribution for scanning mobility sizer, electrostatic precipitator and particle charging experiments. With two Model 2U500 Polonium-210 sources, the neutralizer will operate for 3 years before new sources are needed. The unit may also be used to bring highly charged aerosol from atomizers and other sources to charge equilibrium to help reduce electrostatic losses.

Learn About Product

All Features
• Easy-to-install Polonium-210 sources (not included)
• Stainless steel construction
• Ultra-clean high vacuum brazing construction
• Total activity of 1 millicurie (37 MBq)
• High maximum flow rate 5 lpm
• Maximum recommended input number concentration 10^5-10^6 /cc
• Well characterized, stable bi-polar charge distribution
• Conveniently integrated into your sampling system
• Easy to clean
• Ultra-safe and inexpensive off-the-shelf sources
• 3-year useful source life before replacement
Technical Specs

Copyright ©2023 All specifications are subject to change without notice. BMI assumes no responsibility for inaccuracies in this document or for any obligation to update information in this document. BMI reserves the right to change, modify, transfer or otherwise revise this publication without prior notice.

*Some products may be shown with optional accessories, which are sold separately. Items shown may not be to scale.

Applications and Solutions
• Particle sampling requiring an equilibrium bipolar charge distribution
• Continuous monitoring of ambient size distributions using the Brechtel SEMS or mSEMS
• Hygroscopic growth measurements using the Brechtel HTDMA
• Neutralization of atomizer output for instrument characterization
• Laboratory flow-tube reactor studies
• Cloud condensation nucleus studies
• Visibility reduction studies
• Aerosol health impacts
• Long-term climate and air quality monitoring
• Rapid number size distribution measurements
No software is required.
What's Included
• Model 9000 Charge Neutralizer with mounting bracket for two Po-210 sources
• Operator’s manual
The following optional accessories are available:

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