A colorimeter is an electrically powered instrument which measures the concentration of analytes in coloured solutions. It is a simple version of a photometer. The difference in the quality of its filters makes it less sensitive. The colorimeter is used for clinical chemistry, namely for determining haemoglobin concentrations. Colorimeters are made by several manufacturers and include types with inbuilt individual removable filters or filter wheels for up to ten wavelengths. Some models are adapted for hot and humid climates with gelatine filters encased in glass to prevent fungal growth and coated individual components to prevent corrosion.
Coloromiter, UMDNS: 334