Fluid composition sensor device and method of using the same

A device for detecting fluid particle characteristics comprising:

• a fluid composition sensor configured to receive a volume of fluid containing a plurality of particles, the fluid composition sensor comprising:
• an illumination source configured to emit one or more light beams along a beam axis such that at least a portion of the one or more light beams engages a collection media and illuminates one or more particles disposed within the collection media;
• an imaging device configured to capture an image of the one or more particles disposed within the collection media;
• and
• a light shield comprising:
• an internal shield portion enclosed within an inner surface of a shield wall;
• and
• one or more baffle elements disposed within the internal shield portion and configured to reflect at least a divergent portion of the one or more light beams within the internal shield portion;
• wherein the light shield extends at least partially between the illumination source and the imaging device such that at least a portion of the one or more light beams emitted along the beam axis pass through the internal shield portion.

The device of claim 15, wherein the plurality of baffle elements comprises:

• a first baffle element positioned at a first location along the length of the light shield such that a first orifice defined by the first baffle element is separated from the illumination source by a first distance, the first orifice being defined at least in part by a first orifice diameter;
• and
• a second baffle element positioned at a second location along the length of the light shield such that a second orifice defined by the second baffle element is separated from the illumination source by a second distance, the second orifice being defined at least in part by a second orifice diameter;
• wherein the second distance is greater than the first distance;
• and
• wherein the second diameter is smaller than or equal to the first diameter.