Distinguish between Photoelectric Colorimeter and Spectrophotometers.

#	Photoelectric Colorimeter	Spectrophotometers.
1	In this case the source of radiation used is incandescent lamp with tungsten filament.	In this case the source of radiation used is hydrogen or deuterium lamp, discharge tube, glow bar or Newtons glower.
2	They are working with visible light.	They are working with U.V. light, IR light and visible light.
3	Colour filters are used.	Monochromators are used.
4	Beer-Lamberts Law is not strictly obeyed.	Beer-Lamberts Law is strictly obeyed.
5	Any coloured solutions can be analyzed.	Coloured as well as colourless samples can be analyzed.
6	With the help of this instrument only quantitative analysis is possible.	Quantitative as well as qualitative analysis are possible.
7	These instruments are not costly.	These instruments are costly.