Method and apparatus for testing properties of liquids

Details Method and apparatus for testing properties of liquids Method and apparatus for testing properties of liquids

1974-07-24

1976-06-08

Queisser, Richard C.

Chemistry: electrical and wave energy

Processes and products

73 1G, 73 19, 204195R, 417108, G01N 2746

Patent

active

039620468

ABSTRACT:
Apparatus for measuring the dissolved oxygen content of water comprises an open-ended duct immersed in the water in an upright position, an oxygen-detecting probe in the lower end portion of the duct, and means for injecting a continuous stream of air into the upper portion of the duct, the air causing water to rise in the duct and thereby induce a flow of water into the duct and past the probe. A valve in the upper end of the duct is operable by compressed air to shut off the top of the duct so that air builds up inside the duct and back-flushes the liquid through a strainer on the lower end of the duct. Displacement of the water around the duct by air enables the probe to be calibrated. The upper section of the duct into which air is injected may be connected to the lower section containing the probe by polyethylene tubing of a length to enable the lower section of the duct to be lowered to any desired depth.

REFERENCES:
patent: 3272725 (1966-09-01), Garst
patent: 3374743 (1968-03-01), Stutely et al.
patent: 3485472 (1969-12-01), Bozich
patent: 3495438 (1970-02-01), Mangum
patent: 3552712 (1971-01-01), Whitlock
patent: 3560111 (1971-02-01), Sterlini
patent: 3661010 (1972-05-01), Neuwelt
patent: 3672790 (1972-06-01), White et al.
patent: 3718407 (1973-02-01), Newbrough
patent: 3738154 (1973-06-01), Henry

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