Toon Donald A. (Burlington CAX) Belshaw Douglas J. (Georgetown CAX)
출원인 / 주소
Solinst Canada Ltd. (Glen Williams CAX 03)
인용정보
피인용 횟수 :
51인용 특허 :
5
초록▼
A probe is disclosed, for lowering into a water-well or other hole. The probe includes conductivity measuring electrodes, to distinguish between e.g., water and contaminants, such as gasoline. The probe also includes an optical sensing facility to locate the junction between air and liquid. The prob
A probe is disclosed, for lowering into a water-well or other hole. The probe includes conductivity measuring electrodes, to distinguish between e.g., water and contaminants, such as gasoline. The probe also includes an optical sensing facility to locate the junction between air and liquid. The probe comprises a transparent plastic tube, mounted inside a housing. A beam of light from a LED passes obliquely through the plastic tube and onto a photo-transistor. When liquid is encountered in the well, the liquid enters the tube: the change in refractive index now directs the beam away from the photo-transistor. The optical and conductivity sensors are both actuated at the same depth.
대표청구항▼
Apparatus, which is suitable for lowering into a body of a test liquid and for detecting and signalling the presence of the test liquid, wherein: the apparatus includes a light emitting station, which is capable of emitting a beam of light, a light receiving station, a housing, and a tube; the tube
Apparatus, which is suitable for lowering into a body of a test liquid and for detecting and signalling the presence of the test liquid, wherein: the apparatus includes a light emitting station, which is capable of emitting a beam of light, a light receiving station, a housing, and a tube; the tube is made of a solid transparent material, and is cylindrical, having an outer cylindrical surface and an inner cylindrical surface; the inner cylindrical surface defines a hollow internal chamber of the apparatus; the light emitting station, the light receiving station, and the tube, are mounted in a housing, in such a manner that the stations and the tube are mechanically secured against movement relative to the housing and against movement relative to each other; the stations lie outside the tube and lie on a chord of the tube, said chord being not a diameter of the tube; the arrangement of the stations in the housing is such that, when the chamber is empty of the test liquid, light from the light emitting station passes in sequence along a light path which intersects the outer cylindrical surface, passes through the transparent material, intersects the inner cylindrical surface at a point of refraction, passes across the hollow chamber, intersects the inner cylindrical surface, passes back through the transparent material, intersects the outer cylindrical surface, and passes into the light receiving station; the arrangement of the stations in the housing is such that, when the apparatus has been lowered to a sufficient depth into the body of test liquid that the liquid is present in the chamber and is in contact with the inner cylindrical surface at the point of refraction, the said beam is diverted by refraction at the point of refraction, and does not pass into the light receiving station; the apparatus includes a means for detecting and signalling whether or not the beam of light is passing into the light receiving station; the chamber includes a port for admitting the test liquid into the chamber when the apparatus is lowered into the liquid; the apparatus includes a sealing means, which is so arranged that, when the apparatus is lowered into the test liquid, the sealing means is effective to prevent access by the liquid to both points on the outer cylindrical surface at which the said light path intersects the outer cylindrical surface.
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Ader M. Rostami ; David C. DeCoster ; Eustathios Vassiliou ; Mark W. Dassel ; Sharon M. Aldrich, Device for detecting formation of a second liquid phase.
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