Corvettes are very much used in manual colorimeters these are inserted and removed by hand and automated colorimeters if very much fitted with a flow cell through which the solution flows continuously. Another one includes output from a colorimeters would be displayed by an analogue or digital meter which may be shown as a transmittance and in addition the output may be sent to a chart recorder, data logger or computer. In scientific language colorimeter is a light sensitive instrument used for measuring the color intensity of an object or color sample which is in terms of blue, red and green components of light which are reflected from the object or sample. The types of colorimeters are digital, laboratory and portable of which the digital colorimeters make use of light emitting diodes which has a symbol led as a light sources thus for analyzing the absorption spectra and also provides a light crystal display which is known as lcd for the analysis.

Uses of this instrument colorimeters are for testing water quality by screening of chemicals like chlorine, fluoride, cyanide, zinc and hydrazine's etc. These colorimeters are very much used to determine the concentrations of plant nutrients such as phosphorus, nitrate and ammonia which are present in the soil or hemoglobin in the blood for identifying the standard and counterfeit drugs. Colorimeters are also very much used in food industry and also in the manufacture for paint and textiles.