Used MKS PAS #293767098 for sale

MKS PAS (Piston Area Separation) is a residual gas analyzer (RGA) designed to provide comprehensive information about the composition of a sample gas such as pressure, temperature, flow rate, and molecular composition. It works by separating the molecules of a sample gas into different channels, allowing for the analysis of each constituent elemental molecule separately. The equipment works by first creating a vacuum chamber that is then filled with a reference gas, such as dry nitrogen, at a pressure slightly above that of the sample to be analyzed. A pulse of electrons or ions is then introduced into the sample, and the scattering of these pulses will be detected and analyzed. Each gas molecule will scatter the electron/ion beam differently, allowing PAS system to map each molecular type to a specific channel. The unit is capable of detecting and measuring the presence of six different types of gas molecules: hydrogen, helium, nitrogen, oxygen, carbon dioxide, and xenon. As the sample is ionized, the resultant drift velocity can be used to identify the molecular type of a given sample by correlating the drift velocity to the molecular mass of a specific molecule. MKS PAS machine can analyze a variety of gaseous samples and can be applied to trace gas analysis, the analysis of corrosion protection efficiency, and the evaluation of process leak zones. Its high sensitivity and good resolution make it ideal for use in the semiconductor industry, where high purities and small concentration levels need to be monitored. The tool is very user-friendly, includes a data storage asset, and is available with both positive and negative ionization sources. It is also available with options for a water vapor detection model, as well as a digital recorder. Overall, PAS is an effective and easily operated RGA equipment that provides excellent information on the composition of a variety of samples at a very low cost. It is ideal for research, industrial, and environmental applications, and can serve as a powerful tool for those seeking comprehensive analysis of their samples.