Fluorometers are instruments used to measure fluorescence, which is the light emitted by a sample when it is excited by a specific light source. Fluorometers can be used to measure the fluorescence of various types of samples, such as proteins, nucleic acids, pigments, and other organic and inorganic compounds. Fluorometers are widely used in scientific research, the pharmaceutical industry, environmental analysis, biochemistry, and molecular biology. They can be used for quantitative and qualitative analysis of samples, as well as for the detection and quantification of specific compounds. Fluorometers can also be used in combination with other analytical techniques such as chromatography for more in-depth analysis of samples. Fluorometers can be portable or fixed, depending on their specific use and application.