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| Brand | Huakeyi |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | HK-8520 |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principle | Nessler Reagent Spectrophotometry (in accordance with HJ 535–2009) |
| Measurement Range | 0–50 mg/L NH₃–N (extendable to 60 mg/L via built-in dilution algorithm) |
| Detection Limit | 0.1 mg/L |
| Accuracy | ±(5% of reading + 0.1 mg/L) |
| Repeatability | ±5% RSD |
| Measurement Time | 15–20 min per sample |
| Batch Capacity | 16 samples |
| Display | 7-inch capacitive touchscreen (Chinese/English switchable) |
| Data Storage | Up to 100,000 records (measurements, calibrations, system logs) |
| Interface | USB 2.0 for data export |
| Temperature Control | Integrated thermostatic cuvette chamber |
| Light Source | Imported monochromatic LED (peak wavelength ~420 nm) |
| Optical System | Patented dual-beam ratio-metric photometric path |
| Calibration Options | 1-, 2-, or multi-point calibration with user-defined standards |
| Auto-Stabilization Detection | Real-time signal convergence assessment |
| Dimensions | 390 × 248 × 175 mm |
| Weight | 5 kg |
| Power Supply | AC 100–240 V, 50–60 Hz |
| Power Consumption | ≤10 W |
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