Abstract: A digester-evaporator for partially digesting a sample and for evaporating the solvent after partial digestion. The digester includes at least one reaction coil; a heating element arranged along a portion of the reaction coil; at least a portion of the reaction coil proximate to its output being preheated by the heating element to a degree sufficient to convert a partially digested sample into vapor; a collector spoon with carrier water for collecting sample vapor; and an evaporator portion including an evaporation chamber including a substantially vertically-oriented tube The collector spoon is arranged in the top of the substantially vertically-oriented tube, and a gas supply tube for supplying a preheated gas provided in a top of the substantially vertically-oriented tube so as to create a cyclonic gas flow into the chamber and carry the sample to a container area in a bottom portion of the chamber.

Abstract: A gas detection device is provided comprising an exterior housing in which an active pelement and a compensating pelement are disposed. The gas detection device further comprises a porous frit seated within a distal end of the exterior housing to separate the active pelement and the compensating pelement from the surrounding environment. The porous frit is adapted to prevent flashback into the surrounding environment while allowing movement of environmental gas through the porous frit to contact the active pelement and the compensating pelement. The gas detection device further comprises a flow guide for directing flow of environmental gas into the gas detection device disposed adjacent the exterior side of the porous frit. The flow guide comprises an inlet port through which a forced flow of environmental gas is pumped to pass through the porous frit and into the exterior housing in a direction generally parallel to the axis of the exterior housing.

Abstract: A gas analyzer comprises a diffusion filter to segregate sampled gases containing liquid and particulate solid contaminants from the analyzer. A gas permeable diffusion membrane separates a flowing stream of dirty sample gas from a closed circuit clean gas stream circulated through an analyzer. The membrane does not pass liquids or particulate solids but does permit rapid diffusion of gases so the gas composition in the closed circuit rapidly reaches equilibrium with the sample gas.

Abstract: The present invention relates to a solvator plug for replenishing aqueous or non-aqueous solvents in devices such as electrochemical sensor cells. The plug includes a housing adapted to communicatingly mount to a cell or the like which houses a selected solvent for absorption by the cell. The solvent is maintained within the housing by means of an absorbant material or membrane and is delivered by virtue of osmotic pressure differences.