Patent ID: 8256267

Claim:
A method of determining amounts of condensable species present in a gas containing condensable species comprising: placing a probe into a gas containing condensable species, the probe having a plurality of spaced apart contacts on a outer non-conductive surface; heating the outer non-conductive surface at a selected heating rate and then cooling the outer non-conductive surface at a selected cooling rate over a selected time period; monitoring current flow between the contacts over the selected time period; monitoring the temperature of the non-conductive surface of the probe over the selected time period; identifying peaks in a plot of the current flow over the selected time period; identifying the temperature for the time corresponding to each peak; and correlating which condensable species has a kinetic dew point at each identified temperature; and for each identified condensable species comparing the identified temperature for that species to predetermined correlation of dew point temperature and concentration for that species to determine a concentration of that condensable species present in the gas.