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| Brand | YDWG |
|---|---|
| Origin | Shanghai, China |
| Model | WSL-5S |
| Light Source | LED |
| Color Scale | Lovibond Tintometer Scale (R: 0.1–80, Y: 0.1–80, B: 0.1–50, N: 0.1–4 Lovibond Units) |
| Accuracy | ≤5% |
| Repeatability | ≤±0.2 Lovibond Units |
| Temperature Display Range | 0–50 °C |
| Data Storage Capacity | 1,000 measurements |
| Display | 7-inch color TFT touchscreen |
| Interfaces | RS232, USB, USB flash drive support |
| Cuvette Dimensions | 10 mm × 20 mm × 40 mm |
| Power Supply | 220–240 V AC, 50 Hz ±1 Hz, 20 W |
| Dimensions (L×W×H) | 368 mm × 270 mm × 150 mm |
| Net Weight | 4.5 kg |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | DGB-421 |
| Price | USD 320 (FOB Shanghai) |
| Measurement Range | 0–50 PCU (Platinum-Cobalt Units) |
| Accuracy | ±5% or ±1 PCU (whichever is greater) |
| Repeatability | ≤3.0% RSD |
| Light Source | High-intensity, long-life LED |
| Calibration Method | Platinum-Cobalt Standard (GB 5750.4-2006) |
| Units Supported | PCU, Hazen, Pt-Co, mg Pt/L |
| Calibration Options | Preloaded standard curve + 2-point user calibration |
| Data Storage | 200 measurement records with timestamp, operator ID, and calibration status |
| Power Supply | 4 × AA alkaline batteries or 5 V DC via micro-USB |
| Environmental Rating | IP65 |
| Dimensions (L×W×H) | 220 × 100 × 80 mm |
| Weight | 0.8 kg |
| Compliance | GB/T 5750.4–2006, ISO 7887:2011 (Water quality — Examination of colour), GLP data integrity features (audit trail enabled) |
| Brand | YDWG |
|---|---|
| Origin | Shanghai, China |
| Model | WSL-2 |
| Red Scale Range | R 0.1–R79.9 Lovibond Units |
| Yellow Scale Range | Y 0.1–Y79.9 Lovibond Units |
| Blue Scale Range | B 0.1–B49.9 Lovibond Units |
| Neutral Grey Scale Range | N 0.1–N3.9 Lovibond Units |
| Minimum Scale Division | 0.1 Lovibond Unit |
| White Reference Plate Diffuse Reflectance | >80% |
| Viewing Tube Diameter | φ30 mm, Length: 215 mm |
| Standard Cell Dimensions | 10×20×40 mm, 25.4×20×40 mm, and 133.4×20×40 mm |
| Magnification | 1.9× |
| Power Supply | 220 V ±22 V, 50 Hz ±1 Hz, 50 W |
| Instrument Dimensions (Main Unit) | 500×320×130 mm |
| Net Weight | 8 kg |
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