The Palas KR-85-370 bipolar aerosol neutralizer is a bipolar neutralizer which generates both positive as well as negative ions through ionization with the emitted β radiation. If these ions are brought together with an aerosol a defined equilibrium charge distribution is established, as is necessary for measuring systems, such as scanning mobility particle sizers such as the Palas U-SMPS systems. This neutralizer is available in two versions with different activities, 75 MBq and 370 MBq.
Compared to uni-polar neutralization, bipolar neutralization has a significant advantage. Regardless of the initial state of charge of the particles, a reproducible equilibrium charge distribution is always established. This is why bipolar neutralization is mandatory for traceable calibration of a condensation particle counters in accordance with standards such as ISO / CD 27891.
As the Kr-85-370 neutralizer is an enclosed radioactive source, additional requirements for documentation and handling regarding radiation protection should be considered. Should you have any questions related to this, we would gladly support and advise you. Regarding the dangers of Kr-85, Krypton 85 (Kr-85) is a radioactive noble gas. When released, it is practically not absorbed by the body, inhaled Kr-85 is exhaled again and Kr-85 is a radioactive substance with a relatively low radio toxicity.
When Kr-85 is released, it is (generally) sufficient to provide ventilation of the working area for a short while. Upon request, Palas offers an additional lead-lined housing free of charge in which the Kr-85 neutralizer can be placed during operation. Should you be interested in a non-radioactive neutralizer, please contact us for more details and the best possible advice.
- Reliable method for defined charge neutralization
- Long lifetime
- Low operation costs
- Neutralization for SMPS systems
- Neutralization for filter test systems
- Neutralization for diverse measuring tasks and to avoid particle losses due to electrostatic deposition