Device for evaluation of fluids using electromagnetic energy

A sampling device, comprising:

• a sample chamber, the sample chamber having an interior to receive a sample cuvette at least partially therein, the sample chamber having at least one opaque wall, a first aperture, a second aperture positioned diametrically across the sample chamber from the first aperture, and a third aperture positioned along an axis perpendicular to an optical axis that extends between the first and the second apertures, the first, the second, and the third apertures transmissive of electromagnetic energy of at least some wavelengths in an optical portion of the electromagnetic spectrum;
• an emitter circuit board, the emitter circuit board spaced from the sample chamber opposed to the first aperture of the sample chamber, the emitter circuit board carrying a plurality of emitters, each of the emitters selectively operable to emit electromagnetic energy in a respective range of wavelengths toward the first aperture of the sample chamber, the ranges of wavelengths of at least some of the emitters different from the ranges of wavelengths of others of the emitters;
• a calibration circuit board spaced outwardly of the sample chamber and positioned between the sample chamber and the emitter circuit board, the calibration circuit board having a first face opposed to the first aperture of the sample chamber, a second face opposite the first face, and a slit that is transmissive of electromagnetic energy of at least some wavelengths in the optical portion of the electromagnetic spectrum, the calibration circuit board having at least one calibration sensor affixed to the second face of the calibration circuit board to face the emitter circuit board to receive electromagnetic energy emitted by at least one of the emitters, substantially free of electromagnetic energy emitting, if any, from the sample chamber;
• a direct sensor circuit board spaced outwardly of the sample chamber opposed to the second aperture of the sample chamber, the direct sensor circuit board having at least one primary sampling sensor positioned to receive electromagnetic energy emitting from the sample chamber via the second aperture;
• and
• an indirect sensor circuit board spaced outwardly of the sample chamber opposed to the third aperture, the indirect sensor circuit board perpendicular to the direct sensor circuit board, the indirect sensor circuit board carrying a number of second primary sampling sensors positioned to receive electromagnetic energy indirectly scattered from the sample chamber along an axis that is perpendicular to the optical axis that extends between the first and the second apertures.