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| Origin | Shanghai, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (PRC) |
| Model | 723N |
| Price | USD 920 (FOB Shanghai) |
| Wavelength Range | 325–1000 nm |
| Wavelength Accuracy | ±1 nm |
| Wavelength Repeatability | ≤0.5 nm |
| Spectral Bandwidth | 4 nm |
| Stray Light | ≤0.3% τ (at 360 nm, NaNO₂ reference |
| typical measured | 0.1% τ) |
| Transmittance Range | 0.0–200.0% τ |
| Transmittance Accuracy | ±0.5% τ (certified NIST-traceable NBS 930D filter) |
| Transmittance Repeatability | ≤0.2% τ |
| Absorbance Range | –0.301 to 4.000 A |
| Baseline Flatness | ±0.005 A |
| Drift | ≤0.004 A/h |
| Sampling Interval Options | 0.1, 0.2, 0.5, 1, 2, or 4 nm |
| Display | 5″ LCD graphical interface |
| Output | Integrated thermal printer (optional external USB/RS-232 connectivity) |
| Brand | Beifen Ruili |
|---|---|
| Origin | Beijing, China |
| Model | 722N |
| Optical System | Single-beam Czerny-Turner with 1200 L/mm grating |
| Wavelength Range | 350–1020 nm |
| Spectral Bandwidth | 6 nm |
| Wavelength Accuracy | ±2 nm |
| Stray Light | ≤0.3% T at 400 nm |
| Photodetector | Silicon photodiode array |
| Measurement Modes | Transmittance (T), Absorbance (A), Concentration (C) |
| Display | 128×64 dot-matrix LCD |
| Zero Adjustment | Automatic |
| Weight | 8 kg |
| Dimensions (L×W×H) | 520×450×320 mm |
| Origin | Beijing, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (PRC) |
| Model | UV-9600 |
| Price | USD 1,780 (FOB Beijing) |
| Wavelength Range | 190–1100 nm |
| Spectral Bandwidth | 5.0 nm (1/2/4 nm selectable) |
| Wavelength Accuracy | ±2.0 nm |
| Wavelength Repeatability | ≤1.0 nm |
| Photometric Accuracy (Transmittance) | ±0.5% τ |
| Photometric Repeatability (Transmittance) | ≤0.2% τ |
| Stray Light | ≤0.05% τ (at 220 nm with NaI |
| Baseline Stability | ≤0.001 A/30 min (at 500 nm, post 30-min warm-up) |
| Photometric Modes | Transmittance (%T), Absorbance (A), Concentration (C), Energy |
| Photometric Range | –0.3 to 3.0 A |
| Display | 16×2 character LCD |
| Detector | Imported silicon photodiode |
| Light Sources | Imported deuterium lamp (optional), imported tungsten-halogen lamp |
| Power Supply | AC 220 V / 50 Hz or 110 V / 60 Hz |
| Power Consumption | 120 W |
| Dimensions (W×D×H) | 530 × 410 × 210 mm |
| Net Weight | 16 kg |
| Brand | Beifen Ruili |
|---|---|
| Origin | Beijing, China |
| Model | UV757 |
| Optical System | Single-beam |
| Detector | Photodiode Array |
| Wavelength Range | 190 nm – 1100 nm |
| Wavelength Accuracy | ±0.8 nm |
| Spectral Bandwidth | 3 nm |
| Stray Light | ≤0.15% T (at 220 nm and 360 nm) |
| Absorbance Range | −0.301 A to 4.000 A |
| Transmittance Range | 0.0% T to 200.0% T |
| Concentration Readout Range | 0–9999 (arbitrary units) |
| Absorbance Repeatability | ±0.002 A |
| Transmittance Accuracy | ±0.5% T (verified with NIST-traceable NBS 930D filter) |
| Baseline Linearity | ±0.004 A |
| Drift | ≤0.004 A/30 min |
| Noise | 0.5% T (at 100% T), 0.2% T (at 0% T) |
| Power Supply | AC 220 V, 50 Hz |
| Dimensions | 520 mm × 410 mm × 200 mm |
| Net Weight | 18 kg |
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