NOVELTY - Producing a purified gas output (I), comprises: generating a purified gas output via pressure swing adsorption (PSA); monitoring in situ the purified gas output in real-time to detect a parameter associated with PSA; dynamically analyzing the parameter associated with PSA to a threshold value; and controlling PSA based at least in part upon the in situ real-time monitoring of the purified gas output.    USE - The method is useful: for producing a purified gas output (claimed) to remove carbon dioxide in oil refineries and flue streams of the steel and lime industries, and hydrogen sulfide from hydrogen feed and recycle streams of hydrotreating and hydrocracking units; and to produce oxygen in the medical industry, particularly in remote or inaccessible parts of the world (where bulk cryogenic or compressed cylinder storage is not possible) and purified oxygen for breathable air for a space suit, space station, and space craft and ammonia.    ADVANTAGE - The method: allows continuous tracking of e.g. pressure, flow rate, purified gas output concentration, and dew point in real-time to ensure a level of integrity for purified gas output as well as the health of components, devices, and equipment utilized to generate the purified gas output, thus dynamically adjusting and controlling the PSA to maintain an assured level of quality for the produced purified oxygen gas output; utilizes PSA system that monitors and collects the real-time measurements of at least one parameter in situ without disruption of the PSA system and/or production of the purified gas output; produces the biogas that can be upgraded to a quality similar to natural gas; provides high purity nitrogen gas ( greater than or equal to 99.5%) from a supply of compressed air and oxygen at 90-97%; and captures carbon dioxide in large quantities from coal-fired power plants prior to geosequestration, to reduce greenhouse gas production.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a system (300) for filtering particles with PSA, comprising: an adsorption vessel that is pressurized to force a gas into a filter medium, where a first portion of gas is adsorbed into the filter medium and a second portion of the gas is desorbed from the filter medium; a concentration sensor that dynamically and continuously tracks a concentration level for the second portion of the gas; and a sentinel component (120) that controls at least one of activation or deactivation of the adsorption vessel based at least in part upon the concentration level for the second portion of the gas; and    (2) producing a purified gas output (II), comprising: generating a purified oxygen gas via PSA; monitoring in situ the oxygen gas in real-time to detect at least one of pressure, flow or concentration of the oxygen gas; and controlling PSA based at least in part upon the in situ and real-time monitoring of at least one of pressure, flow or concentration.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic block diagram of the system that facilitates controlling pressure swing adsorption (PSA) based upon sensors that continuously aggregate data in real-time.    PSA component (110)    Sentinel component (120)    System (300)    Setting components (320)    Alarm component (330)