Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1990-12-19
1992-01-14
Johnston, Jill
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
422 81, 422110, 422116, 436 51, 436 52, 436 53, 436 54, 436163, G01N 3500
Patent
active
050808664
ABSTRACT:
A method of analysis in which a first fluid is delivered to a sensing position at a controlled first rate of flow through a fluid junction. Fluid including this first fluid is pumped to the sensing position at a rate of flow greater than the first rate, whereby to aspirate further fluid into the first fluid at the fluid junction. A condition of the fluid is sensed at the sensing position. Associated analytic apparatus includes first and second pumps (1, 2). The first pump has a pair of ports and the second pump has at least one port. A conduit (4, 5) provides fluid flow communication from a first of the ports of the first pump (1) to the port of the second pump (2). A fluid junction (3) in the conduit (4, 5) is spaced from the second pump for admitting a further fluid to the conduit. A sensor (13) is associated with the conduit (5) to sense a condition of the fluid in the conduit at least at a sensing position between the fluid junction (3) and the second pump (2). The first and second pumps (1, 2) are respectively operable to deliver a first fluid to the conduit at a controllable first rate and to draw fluid from the conduit at a rate greater than this first rate, whereby to aspirate further fluid into the conduit at the fluid junction.
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Peachey Russell M.
Petty John D.
Sweatman Denis R.
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