Abstract: A device for sampling and pumping liquids contained in a chemical reaction vessel, drum, or storage tank. A conduit is submerged in a liquid and linked to a cylinder having a piston connected by means of a semi-rigid wire to a manually-operated lever or automatic control system. At the beginning of the cycle, the piston is positioned outside of its associated cylinder, leaving sufficient space for the liquid to enter. When the piston is drawn into the cylinder, the liquid is pushed into the desired sampling container or to a chamber that contains a sensor which continuously measures the parameters of the liquid, when the system is operating cyclically.

Abstract: An apparatus for collecting a sample of a liquid in a vessel. The apparatus includes a tube positioned vertically above the vessel, a cup for removing liquid from the vessel which has an inlet opening and an outlet opening, a device for displacing the cup vertically between a position in the vessel below the surface of the liquid, and another position in the tube above the vessel, a conduit branching off from the tube at a first point adjacent the raised position of the cup, a sample valve in the conduit for admitting liquid to a collector, and a mechanism for diverting liquid outflow from the cup into the conduit.

Abstract: A valve is mounted on a conduit from which it is desired to take a sample of the liquid which flows along the conduit. The body of the valve includes a through passage within which a needle valve member is removably inserted to close the valve. The body is provided, opposite said passage, with a collar in which is engaged the end of a rigid tube with a sampling vessel provided with a needle valve. Thus, it is possible to withdraw samples of the liquid into the vessel without any leakage of liquid and even without any emanation therefrom occuring, which is of the highest importance in the case of toxic or noxious liquids. Moreover, the device does not produce any dead volume of liquid which it would be necessary to purge before each taking or sampling of liquid from the conduit.