The WD-2112B is a full-wavelength (190-850nm) ultra-micro spectrophotometer that does not require a computer for operation. It is capable of quickly and accurately detecting nucleic acids, proteins, and cell solutions. Additionally, it features a cuvette mode for measuring the concentration of bacterial culture solutions and similar samples. Its sensitivity is such that it can detect concentrations as low as 0.5 ng/µL (dsDNA).