초록 ▼

A process for counting and sizing particles in gases in the size range of 0.0025 micrometers or greater using condensation nucleus counting wherein the condensing temperature of a saturated working fluid is incrementally adjusted to adjust sensitivity to differing sizes of particles and thus discrim

A process for counting and sizing particles in gases in the size range of 0.0025 micrometers or greater using condensation nucleus counting wherein the condensing temperature of a saturated working fluid is incrementally adjusted to adjust sensitivity to differing sizes of particles and thus discriminate according to size.

대표청구항 ▼

A continuous process for sizing particles in a particle-containing gas using condensation nucleus counting, comprising: (a) passing a particle-containing gas mixed with a working fluid vapor into a condensation zone, (b) condensing working fluid on that portion of the particles of a minimum size cor

A continuous process for sizing particles in a particle-containing gas using condensation nucleus counting, comprising: (a) passing a particle-containing gas mixed with a working fluid vapor into a condensation zone, (b) condensing working fluid on that portion of the particles of a minimum size corresponding to a minimum temperature of the condensation zone to form droplets, (c) detecting the resulting droplets and counting the number of droplets by appropriate sensing of scattered light for each droplet and tabulation, (d) incrementally adjusting the degree of saturation of the working fluid in the gas by incrementally adjusting the temperature of the condensation zone to increase the degree of saturation at lower temperatures, and (e) performing step c) at each increment of temperature adjustment.