Human Antithrombin (AT) CLIA Kit is a Sandwich CLIA Kit for use with Serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids. Please note that this kit is also available as an ELISA Kit. Quantitative Fluorometric Sandwich ELISA. Sample Types: serum, plasma, tissue homogenates, cell lysates, cell culture supernatants and other biological fluids. Range: 3.12 ng/ml - 200 ng/ml. Sensitivity: < 1.42 ng/ml