AUTOMATED SEQUENTIAL GAS SAMPLING SYSTEM

摘要

A gas sampling system (10) as shown in Figure 1 includes a sample trapping module (12) having a gas pump and a power supply, and a removable magazine (14) that fits within a port of the trapping module. The magazine (14) contains a non-volatile electronic memory, which controls operation of the trapping module, and has a rotating carousel (133) for holding sample tubes. Individual sample tubes (16) are sealed at each end by a cap (31) that has a needle-pierceable septum, and contain a solid collector material (33, 34, 35) to trap chemical and biological contaminants in a gas sample drawn through the sample tube. Individual sample tubes are moved into and out of a sampling location by incremental rotation of the carousel and, while at the sampling location, a pair of hollow bore needles carried on needle drive assembly (80) are inserted through the sample tube end caps to allow the drawing of a gas sample through the tube.