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PRINCIPLE OF OPERATIONPRINCIPLE OF OPERATION
PRINCIPLE OF OPERATIONPRINCIPLE OF OPERATION
PRINCIPLE OF OPERATION
Absorption of Light is a typical phenomenon of interaction between
Electromagnetic Radiation and Matter. When a light beam crosses a
substance, some of the radiation may be absorbed by atoms,
molecules or crystal lattices.
If pure absorption occurs, the fraction of light absorbed depends both
on the optical path length through the matter and on the physico-
chemical characteristics of substance according to the Lambert-Beer
Law:
-log I/I
o
= ε
λ
c d
or
A = ε
λ
c d
Where:
-log I/I
o
=Absorbance (A)
I
o
=intensity of incident light beam
I =intensity of light beam after absorption
ε
λ
=molar extinction coefficient at wavelength λ
c =molar concentration of the substance
d =optical path through the substance
Therefore, the concentration "c" can be calculated from the absorbance
of the substance as the other factors are known.
Photometric chemical analysis is based on the possibility to develop an
absorbing compound from a specific chemical reaction between sample
and reagents.
Light Life Life of the instrument
Light Detector Silicon Photocell
Environment 0 to 50°C (32 to 122°F);
max 95% RH non-condensing
Power Supply 2 x 9 V batteries / 12 to 20 VDC through
voltage adapter
Auto-Shut off After 10' of non-use
Dimensions 230 x 165 x 70 mm (9.0 x 6.5 x 2.8")
Weight 640 g (22.6 oz.)
For specifications related to each single parameter (e.g. range,
accuracy, etc.), refer to the related measurement section.
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
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