Rat TNFb ELISA Kit is a sandwich ELISA kit for use with Serum, plasma and other biological fluids. This assay has high sensitivity and excellent specificity for detection of Tumor Necrosis Factor Beta (TNFb). No significant cross-reactivity or interference between Tumor Necrosis Factor Beta (TNFb) and analogues was observed. Please note that this kit is also available as a CLIA Kit. Quantitative Colorimetric Sandwich ELISA. Sample Types: serum, plasma and other biological fluids. Range: 7.8 pg/ml - 500 pg/ml. Sensitivity: < 3.3 pg/ml