Atmospheric particle analyzer?

Question

At work I use an atmospheric particle analyzer to measure gas levels in confined spaces. I would like to find one that will measure levels of carbon dioxide, oxygen, and nitrogen hopefully in one device. What would this be called and where would I go to find one? Thanks

Answer 1

An RGA, mentioned by the first responder, works in high-vacuum.  What you want is an RGA integrated into a package that can sample atmospheric pressures.  Those generally get called atmospheric gas analyzers.  You might also want to check out headspace analyzers, which get used by the winemaking/brewing/food etc. industries.  I doubt you are going to find one that measured oxygen *and* nitrogen at the same time, since most people would assume that you can get nitrogen by knowing oxygen (the difference between the total pressure and the sum of oxygen partial pressure, the CO2 partial pressure (if you are dealing with fermentation, for instance, and pCO2 is high), and the vapor pressure of water if your system has any humidity,  is the partial pressure of nitrogen.

Answer 2

First, chemical analysis for composition is not the same as particle analysis.  A mass spectrometer will analyze the atomic/molecular masses.  There are a number of companies which manufacture residual gas analyzers (RGAs) specifically for gases.  Google it.