1
Dietrich W Lubbers: Optical measurement of concentration. Max Planck Gesellschaft zur Forderung der Wissenschaften e V, Michael J Striker, December 22, 1981: US04306877 (56 worldwide citation)

The concentration of a substance of interest is measured by exposing a peable-membrane face of an indicator chamber containing an indicator to the substance, monochromator radiation being incident upon the indicator through a transparent wall of the indicator chamber, the exiting radiation being rec ...


2
Jon P Longtin: Method and apparatus for optical measurement of concentration and temperature of liquids. Research Foundation of State University of New York, Baker Botts L, April 15, 2003: US06549276 (18 worldwide citation)

Disclosed are a method and an apparatus for precision optical measurement of solute concentration and temperature of a transparent liquid. The apparatus includes a vessel (


3
Longtin Jon P: Method and apparatus for optical measurement of concentration and temperature of liquids. The Research Foundation Of State University Of New York, Longtin Jon P, TANG Henry, May 11, 2000: WO/2000/026665 (1 worldwide citation)

Disclosed are a method and an apparatus for precision optical measurement of solute concentration and temperature of a transparent liquid. The apparatus includes a vessel (12) which contains a sample of liquid (14), the refractive index of which is to be determined, a light source (22), and a beam p ...