Abstract: A method for drying a gas sample comprises flowing purge gas over the exterior of tubes of a perfluorosulfonic acid membrane and flowing the gas sample through interior of tubes, wherein the drying operation is conducted under deep vacuum and with the purge gas flowing at a rate that is typically less than that of the gas sample being dried.

Abstract: A system for humidifying oxygen for low-flow oxygen therapy includes a volume-adaptable water reservoir that contains, in addition to water, a water-vapor-permeable membrane.

Abstract: A hybrid cooler/dryer that conditions a sample gas includes a heat exchanger, a condensate-removal device, and a membrane dryer. In some embodiments, the hybrid cooler/dryer also includes passive cooling, as embodied by an air amplifier and heat sink, or a length of tubing that exposes the sample gas to ambient temperature. The hybrid cooler/dryer requires no electrical power.

Abstract: A portable sampling system includes a heated probe, an input/output (“I/O”) system, and one membrane dryer in the form of a conduit that couples the probe to the I/O system. The dryer has purge gas flowing over the drying membrane and a gas sample flowing through the drying membrane, which is in the form of tubes of a perfluorosulfonic acid material, and wherein the dryer is operated in some embodiments under deep vacuum and with the purge gas flowing at a rate that is typically less than that of the gas sample being dried.

Abstract: A membrane gas dryer includes an upstream fitting assembly, a downstream fitting assembly, a purge tube, and a sample element. The upstream fitting assembly and the downstream fitting assembly include fitting bodies and barrier sleeves. The fitting bodies and the barrier sleeves form purge plenums that are in fluid communication with the purge tube. Sealing interfaces on the fitting bodies maintain fluid-tight seals around the purge plenums as the barrier sleeves rotate about fitting bodies. The sample element includes a water-permeable membrane and passes inside the purge tube such that moisture in a sample gas flowing in a downstream direction through the sample element between the fitting body to the downstream fitting body passes moisture through the water-permeable membrane and into a purge gas flowing in the purge tube in one of an upstream direction or a downstream direction between the purge plenums.

Abstract: In accordance with one embodiment of the present invention, a probe assembly comprising a flange assembly, a probe platform, a platform extension, an extension enclosure, and a fluid coupling assembly is provided. The fluid coupling assembly comprises a removable portion and a retained portion. An engaging interface of the retained portion cooperates with an engaging interface of the removable portion such that, with engagement of the removable and retained portions, respective fluid passages of the removable and retained portions form one or more integrated fluid channels configured to permit passage of fluid through the fluid coupling assembly. The probe assembly is configured such that the probe platform, the platform extension, and the removable portion of the fluid coupling assembly are interconnected and are configured to be withdrawn simultaneously from the probe assembly independent of the retained portion of the fluid coupling assembly.

Abstract: A membrane gas dryer includes an upstream fitting assembly, a downstream fitting assembly, a purge tube, and a sample element. The upstream fitting assembly and the downstream fitting assembly include fitting bodies and barrier sleeves. The fitting bodies and the barrier sleeves form purge plenums that are in fluid communication with the purge tube. Sealing interfaces on the fitting bodies maintain fluid-tight seals around the purge plenums as the barrier sleeves rotate about fitting bodies. The sample element includes a water-permeable membrane and passes inside the purge tube such that moisture in a sample gas flowing in a downstream direction through the sample element between the fitting body to the downstream fitting body passes moisture through the water-permeable membrane and into a purge gas flowing in the purge tube in one of an upstream direction or a downstream direction between the purge plenums.

Abstract: An apparatus, process, coating, and filter for the accurate measurement of total mercury concentration in flue gas. In one aspect, the concentrations of both elemental and oxidized mercury are preserved by the apparatus for analysis. Accordingly, embodiments of the present apparatus and process can be used to determine regulatory compliance or for process control measurement.

Abstract: In accordance with one embodiment of the present invention, a probe assembly comprising a flange assembly, a probe platform, a platform extension, an extension enclosure, and a fluid coupling assembly is provided. The fluid coupling assembly comprises a removable portion and a retained portion. An engaging interface of the retained portion cooperates with an engaging interface of the removable portion such that, with engagement of the removable and retained portions, respective fluid passages of the removable and retained portions form one or more integrated fluid channels configured to permit passage of fluid through the fluid coupling assembly. The probe assembly is configured such that the probe platform, the platform extension, and the removable portion of the fluid coupling assembly are interconnected and are configured to be withdrawn simultaneously from the probe assembly independent of the retained portion of the fluid coupling assembly.

Abstract: In accordance with one embodiment of the present invention, an apparatus for separating a particulate-containing gas flow into particulate and substantially non-particulate flow portions is provided. The apparatus comprises a sample gas inlet, a radial separating ring, a separation draw, a separated gas outlet, a bypass eductor, and a bypass gas outlet. The radial separating ring comprises a separating ring gap defined between an inlet ring orifice and an outlet ring orifice, and is positioned such that a sample gas flow moving downstream from the sample gas inlet through the bypass eductor to the bypass gas outlet passes across the separating ring gap. The radial separating ring is configured such that the inlet ring orifice and the outlet ring orifice are relatively large, in relation to the size of the separating ring gap, and are positioned in close proximity to each other along the direction of the sample gas flow.

Abstract: An apparatus, process, coating, and filter for the accurate measurement of total mercury concentration in flue gas. In one aspect, the concentrations of both elemental and oxidized mercury are preserved by the apparatus for analysis. Accordingly, embodiments of the present apparatus and process can be used to determine regulatory compliance or for process control measurement.

Abstract: An apparatus, process, coating, and filter for the accurate measurement of total mercury concentration in flue gas. In a preferred aspect, the concentrations of both elemental and oxidized mercury are preserved by the apparatus for analysis. Accordingly, embodiments of the present apparatus and process can be used to determine regulatory compliance or for process control measurement.