Measuring and monitoring matter present in injectable drugs is important to companies involved in formulation development, manufacturing, and packaging. Companies have had to rely upon multiple lab instruments to perform analysis of biologics: light obscuration (LO), plus another method like manual microscopy or flow imaging, due to limitations of LO technology. According to the manufacturer, the FlowCam + LO has been designed to get FDA-mandated LO results and flow imaging morphology information from a single instrument. In the FlowCam + LO, a single sample passes continuously through two flow cells. The first uses FlowCam technology to capture digital images of particles ranging from 1µm–1mm, and the second uses light obscuration to provide data necessary for the United States Pharmacopeial Convention compliance.