Contaminant detector

G - Physics – 01 – N

Patent

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Details

G01N 21/31 (2006.01) G01N 21/33 (2006.01) G01N 33/49 (2006.01)

Patent

CA 2272365

A contaminant detector including a light source for emitting light of a wavelength with peak emission corresponding to that of "blue" light or to that of light of even lower wavelength. Light is emitted through an arrangement containing a liquid sample having a given contaminant, and a sensing arrangement on the other side of the liquid sample detects the amount of light passing through the liquid sample. The measured light is converted into a value indicative of the relative presence of the given contaminant in the liquid sample. It is contemplated that other types of light can be used, particularly if the color of the light is matched, or even approximately matched, with that portion of the liquid sample that is not to be measured (i.e. the "background" or "non-contaminant" portion of the liquid).

La présente invention concerne un détecteur de contaminant comportant une source lumineuse permettant d'émettre une lumière caractérisée par une longueur d'onde dont l'émission d'un pic coïncide avec celui de la lumière "bleue" ou avec celui d'une lumière dont la longueur d'onde peut être inférieure. Une lumière est émise au travers d'un dispositif contenant un échantillon de liquide comportant un contaminant donné, et un dispositif de détection, placé de l'autre côté de l'échantillon de liquide, détecte la quantité de lumière traversant cet échantillon. La lumière mesurée est convertie en une valeur indicative de la présence relative du contaminant donné, dans l'échantillon de liquide. On peut utiliser d'autres types de lumière, en particulier, si la couleur de la lumière correspond ou se rapproche approximativement de la partie de l'échantillon de liquide qu'on ne mesure pas (par exemple, la partie "non contaminante" ou de "fond" du liquide).

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