Gas analysis may refer to:
Blood gas analysis, a method that measures arterial oxygen tension, carbon dioxide tension, and other aspects of a blood sample Breath gas analysis, a non-invasive method that measures volatile organic compounds present in the exhaled breath Dissolved gas analysis, a method that measures dissolved gases in insulating fluids Evolved gas analysis, a method that measures the gas evolved from a heated sample that undergoes decomposition or desorption Breathing gas analysis, especially for breathing gas mixtures Trace gas analysis, as an application of mass spectrometry, ion-mobility spectrometry or a combination of the two methods
Gas analyzer may refer to: Infrared gas analyzer Residual gas analyzer Orsat gas analyser Thermal and Evolved Gas Analyzer, a scientific instrument aboard the Phoenix spacecraft Helium analyzer, an instrument to measure the concentration of helium in a gas mixture Electro-galvanic oxygen sensor, a device which consumes a fuel to produce an electrical output by a chemical reaction