The Finecare PSA (Prostate Specific Antigen) Reagent Kit, when used with a Finecare immunofluorescence analyzer, quantitatively measures Prostate-Specific Antigen (PSA) levels in human blood (whole blood, serum, or plasma). It provides quantitative results — meaning it gives a precise numerical concentration of PSA, which is crucial for aiding in the diagnosis and management of prostate-related conditions.