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| Product Name | laspec Alpha-1900Plus UV-Visible SpectroPhotoMeter | YUEFENG 770S UV-Visible SpectroPhotometer |
| Product Price | In coming | $2591.00 |
| Details | Details | |
| Model comparison | ||
| Spectral Type | UV-Vis | UV-Vis |
| Optical Path | Double-Beam | Pseudo-Double-Beam |
| Dispersion | Grating | Grating |
| Detection | Scanning | Scanning |
| Light Source | Tungsten Deuterium | Tungsten Deuterium |
| Wavelength | 190-1100nm | 190-1100nm |
| Accuracy | ≤0.5nm | ≤0.5nm |
| Bandwidth | ≤2nm | ≤2nm |
| Detector | ||
| Stray Light | ≤0.05%T | ≤0.2%T |
| Parameter comparison | ||
| wavelength Range | 190 - 1100 nm | |
| Light spectrum Bandwidth | 2 nm | 2nm |
| Optical inspection system | Dual beam of light and CT optical path; 1200 lines/mm laser holographic Diffraction grating | Proportional double beam of light, 1200/mm Holographic grating |
| Wavelength accuracy | +/- 0.1 nm (656.1 nm D2 ）, +/- 0.3 nm (full wavelength Range) | |
| Wavelength, repeability | ±0.2 nm | |
| Wavelength resolution | 0.1 nm | |
| Photometric Range | -0.3 to 3 A ; 0-200% T ; -9999 to 9999 C | 0.0%(T)~200.0%(T)；-0.301~4.000(A) |
| Photometric accuracy | ±0.002 A @0.5A , ±0.3% (0~100% T) | |
| Luminosity, repeability | ±0.001 A @0.5A , ±0.15% T (0~100% T) | |
| stray light | ≤ 0.05% T （220 nm，NaI；360 nm，NaNO2） | ≤ 0.15% (T) (at 220 nm, as NaI) (at 360 nm, as NaNO2) |
| Baseline flatness | ±0.001 A | ±0.002A(200nm~1090nm) |
| Stability | ±0.0005 A/hr @500nm ,0A | |
| luminosity noise | ±0.0003 A | |
| Data output - Android touch screen | 9.7 inches | |
| Data output - LAN printer | support | |
| Data output - U disk access and mail sending | support | |
| Data output - RS232 and Bluetooth connection | support | |
| Size | 660 x 580 x 270mm | |
| weight | 28.5 kg | |
