Patent ID: 6694157
Filing Date: 2004-02-17
Classification: A61B

Abstract:
Apparatus for use in measuring molecular constituents of a sample of light dispersive fluids comprising:a housing having an optically transmissive chamber for receiving a sample of light dispersive fluid; first and second light sources respectively having first and second narrow bands of wavelengths, said first and second light sources being oriented to illuminate a sample in the chamber when the light sources are transmitting light; a first and second sensors adapted to respectively detect the first and second narrow bands of wavelengths; and a diffuser including an optically transmissive material containing a dispersion of non-absorptive light-scattering particles disposed between the sample and at least one of the light sources, and adapted to diffuse the light from said at least one of said light sources incident on the sample; said first and second narrow bands of wavelengths and said first and second sensors being respectively selected to detect pH and pCO2 of such sample.