Photometers
These are optical instruments for measurement of the absorption of light of a given wavelength (or a given range of wavelengths) of coloured substances in solution. From the light absorption, Beer's law makes it possible to calculate the concentration of the coloured substance in the solution. Due to its wide range of application and its reliability and robustness, the photometer has become one of the principal instruments in biochemistry and analytical chemistry.EcoSense 9500 Photometer
| SPECTRO Portable Spectrophotometer
| YSI 9300 Photometer 
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YSI 9300-9500 Reagents for Water Quality Tests 
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