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| Brand | SkyRay Instrument |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | WM-3000P |
| Instrument Type | Portable |
| Measurement Principle | Colorimetric Spectrophotometry (DAP/DPD-based for chlorine species |
| Measured Parameters | Free Chlorine, Total Chlorine, Chemical Oxygen Demand (COD) |
| Measurement Range | 0.02–1000 mg/L |
| Accuracy | ≤ ±5% of reading |
| Repeatability | ≤ ±5% RSD |
| Resolution | 0.01 ppm |
| Limit of Detection | 0.01 ppm |
| Power Supply | Two 1.5 V AA batteries (72 h continuous operation) or 220 VAC-to-3 VDC adapter |
| Data Storage | Internal non-volatile memory with timestamped records (date, time, parameter ID, sample ID, result) |
| Ingress Protection | IP41 (dust-protected, vertically dripping water resistant) |
| Compliance | Designed to support ASTM D1253, ISO 7393-2 (chlorine), and ISO 6060 (COD) methodology alignment |
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