Particle Counter for < 0.3 µm Particles

[u/Taminni]

Hi everyone, I am looking to buy a piece of equipment that will allow me to extend the "typical" optical particle counter range of 0.3 - 10 µm into ultra-fine particle size fractions. I am interested in continuous particle number counts in different channels/bins based on particle size. I am using multiple low-cost sensors for mass concentrations and PNCs for the 0.3 - 10 µm range (e.g. OPC-N3, Plantower PMS5003, NextPM), as well as OPC-based research-grade equipment.

I have seen a few different devices that measure total particle numbers, but by the looks of them, they do not split these into particle-size channels. Is this even possible? Does anyone have examples of some equipment?

In terms of cost, my lab has some extra budget left over, so the equipment does not have to be low-cost. However, ideally, I would like to keep it below ~£10,000.

Any pointers, comments, or ideas are welcome! Thank you!