Abstract: Disclosed herein are devices, systems, and methods for dispensing fluids. One general aspect includes a multi-chamber fluid dispenser. The multi-chamber fluid dispenser includes a container and a cap. The container has a plurality of chambers formed therein. Each of the chambers in the plurality of chambers is configured to store fluid therein. The cap is for covering the container. The cap includes a distributor through which fluid stored in any one of the chambers in the plurality of chambers is allowed to be expelled from the container Each of the chambers in the plurality of chambers is configured to be in fluid communication with the dispenser such that fluid is dispensable from the container in at least one of the following manners individually as an individual fluid and together as a mixed fluid.

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 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 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 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 vehicle structure includes a body and a roof frame. The roof frame includes two side members, two cross members and a brace. The two side members are spaced from each other and both are connected to the body. The two cross members are spaced from each other and both extend from one side member to the other side member. The cross members arch toward each other and each has an apex between the side members. The brace is connected to the apexes and extends from one side member to the other side member.

Abstract: A vehicle structure includes a body and a roof frame. The roof frame includes two side members, two cross members and a brace. The two side members are spaced from each other and both are connected to the body. The two cross members are spaced from each other and both extend from one side member to the other side member. The cross members arch toward each other and each has an apex between the side members. The brace is connected to the apexes and extends from one side member to the other side member.