Apparatus and method for sampling fluid and analyzing fluid samples

A method for analyzing fluid samples comprising:

• causing at least one illumination source component of a fluid sampling and analyzing device to emit at least one light beam, wherein the fluid sampling and analyzing device comprises a fluid imaging chamber comprising a flow channel for receiving a fluid sample, wherein the at least one light beam is directed through the fluid sample in the flow channel from a top surface of the fluid imaging chamber, wherein an angled mirror positioned above the fluid imaging chamber is configured to redirect the at least one light beam vertically into the fluid imaging chamber;
• receiving lens-less digital holography image data from an image sensor component of the fluid sampling and analyzing device, wherein the image sensor component is positioned under a bottom surface of the fluid imaging chamber;
• and
• determining estimated sample characteristics data associated with the fluid sample based at least in part on applying at least one machine learning model on the lens-less digital holography image data.