The Equalbit 1 × dsDNA HS (High Sensitivity) Assay Kit is a simple, sensitive, and precise fluorescence quantification kit for double-stranded DNA (dsDNA). The kit contains a pre-mixed working solution (with a fluorescent dye) and the dsDNA standard. It shows good linearity when the dsDNA content in the specimens is within the range of 0.2-100 ng and can precisely quantify dsDNA in 10 pg/μl-100 ng/μl specimens. The kit has good tolerance to common contaminants such as RNA, salts, free nucleotides, proteins, solvents, and detergents. The kit is easy to use: directly add an appropriate amount of the specimen to the working solution and assay using a Qubit fluorometer.