Liquid sampling

Details Liquid sampling Liquid sampling

1982-05-26

1984-02-21

Swisher, S. Clement

Measuring and testing

Sampler, sample handling, etc.

Withdrawing through conduit or receptacle wall

G01N 114

Patent

active

044322496

ABSTRACT:
Apparatus for obtaining samples of liquids such as raw sewage from a flow line (1) comprises a tube (2) opening into a container (4) and a tube (7) connecting between a pressure medium supply (9) and the container (4). A reservoir (8) connects with the tube (7) and can be vented. By means of the controlled operation of valves the pressure medium is used to clear the tube (2) before opening of a valve (5) a controlled volume of the pressure medium is passed to the reservoir (8) to withdraw a liquid sample into the container (4), excess sample above the level of the tube (2a) is transferred back to the flow line (1), and the tube (2) is again cleared. The valves (5, 6) do not therefore have any contact with any liquid from the line (1) during their operation.

REFERENCES:
patent: 4037472 (1977-07-01), Gates
patent: 4181022 (1980-01-01), Perry

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