Using spectrometry for the measurement of hundreds of different compounds, the field gas analyzer can be used as a survey tool, specific gas monitor or for Chemical Warfare Agents (CWCs). This is not a monitor to be used for confined space entry. Software allows the use of a library of compounds that can be identified in the field. Gases are drawn into a portable monitor for spectral analysis; with information then transferred to a PC for data retrieval, further analysis and record keeping. Both identification of a specific gas and concentration can be obtained.