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| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Manufacturer |
| Country of Origin | China |
| Model | DGB-421 |
| Measurement Range | 0–50 PCU (Platinum-Cobalt Units) |
| Accuracy | ±5% or ±1 PCU |
| Repeatability | ≤3.0% |
| Protection Rating | IP65 |
| Power Supply | 4×AA batteries or USB 5V DC |
| Dimensions | 100 × 220 × 80 mm |
| Weight | 0.8 kg |
| Display | High-resolution LCD |
| Calibration | Zero and full-scale calibration with Pt-Co standard solutions |
| Data Storage | 200 sets |
| Compliance | GB/T 5750.4–2023 (Standard Methods for Examination of Drinking Water – Color) |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | DGB-421F |
| Price | USD 560 (FOB Shanghai) |
| Measurement Principle | Absorbance-based photometric determination at 365 nm |
| Units | PCU, Hazen, mg Pt·L⁻¹ |
| Range | 0.0–99.9 and 100–500 PCU |
| Accuracy | ±3% or ±0.5 PCU |
| Repeatability | ≤1.5% |
| Light Source | 365 nm high-stability LED |
| Cuvette Pathlength | 25 mm |
| Display | High-resolution color LCD |
| Data Storage | 200 measurement records with GLP-compliant metadata (user ID, sample ID, timestamp, calibration status) |
| Interface | USB 2.0 (PC data transfer), RS-232 (printer output) |
| Power | Rechargeable Li-ion battery (5 V DC input |
| Dimensions | 100 × 245 × 88 mm |
| Weight | 0.5 kg |
| Ingress Protection | IP65 |
| Compliance | GB/T 5750.4–2023 (Standard Methods for Examination of Drinking Water – Color Determination), ISO 7887:2011, ASTM D1209, USP <631> |
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