Flame treated turbidity sensor

Optics: measuring and testing – For light transmission or absorption – Of fluent material

Reexamination Certificate

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C138S097000

Reexamination Certificate

active

06891619

ABSTRACT:
An improved turbidity sensor is provided with a pair of spaced apart arms respectively housing a light transmitter and a light receiver, with the receiver adapted to sense the light from the transmitter and generate a corresponding output signal. The opposing surfaces of the arms adjacent the transmitter and receiver are flame treated for approximately one second each so as to raise the surface energy such that bubble-induced noise is reduced or eliminated for a more accurate output signal.

REFERENCES:
patent: 3889000 (1975-06-01), Cante et al.
patent: 4740287 (1988-04-01), Cawlfield
patent: 5041266 (1991-08-01), Fox
patent: 5331177 (1994-07-01), Kubisiak et al.
patent: 5355048 (1994-10-01), Estes
patent: 5589935 (1996-12-01), Biard
patent: RE35566 (1997-07-01), Boyer et al.
patent: 6206841 (2001-03-01), Cunningham et al.
patent: 6468076 (2002-10-01), Kawamura
patent: 60151919 (1987-01-01), None
Yosha (Journal of Japan Thermal Spraying Society), “Fundamental Study on Development of Wet Optical Sensor by the Thermal Spraying”, vol. 33, No. 4, pp. 40-48, Dec. 1996.

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