Thanks for writing an interesting and informative manuscript. I really enjoyed reading about your novel instrument, which sounds extremely useful and versatile. For future work, you may wish to consider applying a numerical inversion method not just to correct the charging efficiency and transmission, but also to recover a continuous size distribution (instead of fitting lognormals). For example, the Williamson et al. paper you cite, on which I'm a co-author, describes the use of the smoothed Twomey inversion method for retrieving a size distribution from 10 discrete CPCs. Please contact me if you'd like some example code.

I'd like for you to make the following technical corrections before submitting the final manuscript for publication. These are primarily very minor changes for English usage, and a couple of places that need a little more clarity.

Line 10, change "distribution" to "distributions"
Line 11, change "distribution" to "distributions"
Line 11, change "concentration" to "concentrations"
Line 17, I'm not sure this sentence about standard deviations is needed in the abstract. Maybe a statement about the size resolution would be more pertinent.
Line 23, change "For the last" to "Finally, we present NPS measurement results. . . "
Line 54, change "particle trajectories" to "droplets nucleated from these spatially separated particles.
Line 54, this implies that the FIMS detects sub-10 nm particles; it does not.
Line 85, change "sampling ports" to "sampling ports (annular slits)".
Line 87, change "with the increasing diameter" to "with increasing diameter"
Line 109, remove "In this article".
Line 122, can you really determine the mode diameter to within 0.01 of a nm?
Line 215, add "with increasing port number" to the end of the sentence.
Line 232, are you making a rectangular approximation of full-width at half-max (FWHM), and thus need to apply the factor of 2?
Line 257. I doubt that you actually have a bias of this magnitude--at zero particles you don't count 5500/cm^3, do you? The uncertainty on the intercept must be large enough to explain this. Suggest removing this whole discussion of intercept bias, or confirming that the uncertainty in the fit of the intercept encompasses zero.
Line 267, change to "particle size distributions by employing an on/off valve ('A' in Fig. 2(c)) to introduce. . . ."
Line 276, change to "60s after the first SMPS scan began."
Lines 277-278, change to "for particle sizes <32 nm were not recovered from the inversion of this scan because the corresponding voltages were applied to the DMA before the valve was opened, when there were no particles in the sample line."
Line 279, change "scanning process of the TSI-SMPS" to "scan".
Line 280, change to "In contrast, the NPS measurement shows a rapid increase in particle concentration for the complete size range soon after the valve was opened."
Line 285, change "transportation" to "transport". Also suggest removing the entire following 2 sentences, beginning with "The delay was" and ending with "started to increase."
Line 288, change to "TSI-SMPS and NPS were quite distinct as well. After closing the aerosol valve ~180 s after . . . ."
Line 289 change to "from the second scan of the TSI-SMPS showed only smaller particles, in a manner similar to the results in Fig. 8(a)."
Line 290, change to "completely disappeared after some delay time. Therefore," to "quickly approached zero. These tests indicate that the NPS can be. . . ."
Line 294. Place "Further" before "NPS measurements"
Line 295, change to "TSI-SMPS and NPS, respectively, during the cooking of fish."
Line 296. Change "is" to "was"
Line 300. Change to, "SMPS analysis provides only discontinuous size distributions."
Line 308. Remove "In this research"
Line 313 Change "distribution" to "distributions"
Line 314. Change "the" to "a".
Line 316. Remove "the" before "steady-state" and before "unsteady".
Line 317. Add an "s" to "distribution" and "concentration"
Line 321. Change "can be" to "is"
Line 321. Add "for" between "instrument" and "providing"
Line 322. Change to "information on particle size distributions in fast-changing concentration environments."