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The Thermo Scientific Spectronic 20D+ Spectrophotometer is a single-beam digital spectrophotometer with a wavelength range of 340nm to 950nm.

Specifications:
- Spectral slit width: 20nm
- Wavelength range: 340 to 950nm
- Wavelength accuracy: ±2.5nm near 525nm
- Display: LED
- Photometric range: 0 to 100%T, 0 to 1.95A, 0 to 1999C, (0.1 to 1000 Factor)
- Photometric accuracy: ±2%T
- Photometric noise:  ±0.5%T
- Stray radiant energy: 0.5%T* from 340nm to 950nm
- Power: 100/115V, 50/60Hz; 220/240V, 50/60Hz
- Dimensions (W x H x D): 16.25" x 8.5" x 13.5" (41.3cm x 21.6cm x 34.3cm)
- Weight: 18lbs (8.2kg)