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Colorimeter

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Description:A colorimeter is a device used for measuring colours, or colorimetry. It measures the absorbance of different wavelengths of light in a solution. It can be used to measure the concentration of a known solute.

Different parts:

The most important parts of a colorimeter are:
a light source, which is usually an ordinary filament lamp
an aperture, which can be adjusted
a set of filters in different colors
a detector that measures the light which has passed through the solution

Specifications:

Range: 0 to 3 (absorbance)
Useful Range:0.05 to 1.0 (absorbance) 90% to 10% transmittance (%T)
Wavelengths: 430 nm, 470 nm, 565 nm, 635 nm
Typical Resolution: 0.035 %T
Supply voltage: 5VDC +/- 25 mV
Supply current: 40 mA (typical)
Power up time: 700 ms (maximum)
Output voltage range: 0 – 4 V
Transfer function: Vout = 0.035 x (%T) + 0