Lengguang
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| Brand | Lengguang |
|---|---|
| Origin | Shanghai, China |
| Model | 722 |
| Optical System | Double-beam |
| Detector | Photodiode Array |
| Wavelength Range | 325–1000 nm |
| Wavelength Accuracy | ±2.0 nm |
| Spectral Bandwidth | 4 nm |
| Stray Light | ≤1.0% T |
| Wavelength Scanning | Motorized Auto-Positioning |
| Display | 4-digit LCD |
| Auto Zero/Full-Scale Calibration | Yes |
| Transmittance/Absorbance/Concentration/Factor Mode | Automatic Switching |
| Compliance | Meets GB/T 21186–2007 (Chinese National Standard for Visible Spectrophotometers) |