PSA Test is a rapid direct binding test for the detection of Prostate Specific Antigen (PSA) in serum as an aid in the diagnosis of prostate cancer. The test is based on the principle of sandwich immunoassay for determination of PSA in serum. Monoclonal and polyclonal antibodies are employed to identify PSA specifically. This one step test is very sensitive and only takes about 10-20 minutes. The sensitivity of the test can reach to 4ng/ml.