meter spectrophotometer with a wavelength range of
340 nm to 950 nm. The nominal spectral slit width of
20 nm is constant over the entire range.
The SPECTRONICOII 20+ spectrophotometer (Cat.
Nos. 333182-000, 333182-02, 333182-04, 333182-05
or 333182-07), shown in Figure I-I, is a single-beam
2
3
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...
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4
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5
Figure I-I SPECTRONIC 20+ spectrophotometer
KEY
1. Sample compartment
2. Pilot lamp
3. Wavelength control
4. Transmittance/Absorbance control (lOO%T/OA)
5. Power switch/Zero control
6. Filter lever
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