GS HBsAg 3.0 is an enzyme immunoassay (EIA) intended for the detection of Hepatitis B surface antigen (HBsAg) in human serum, plasma and cadaveric serum specimens. Bio-Rad offers a full range of sensitive and specific Hepatitis B Microplate assays to detect every stage of Hepatitis B virus (HBV) infection. All Bio-Rad Hepatitis B enzyme immunoassays (EIA) feature common reagents and procedures for use with other Bio-Rad assays, fast incubation time (2.5 hours) and easy automation. Advanced safety features include: bar-coded reagents, color-coded reagents and reagent labels, microplate strip identification, color monitoring for sample and conjugate addition steps and color changes during protocol steps. A range of ordering options is available to suit unique laboratory needs and test volumes.