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| Brand | Zming Environmental Technology Co., Ltd. |
|---|---|
| Origin | Jiangsu, China |
| Model | HQ-3300 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Potassium Dichromate Digestion Method (Online) |
| Measurement Range | 15–500 mg/L (extendable up to 25,000 mg/L, user-configurable) |
| Analysis Cycle Time | 40 minutes |
| Chloride Interference Tolerance | ≤75,000 mg/L |
| Detection Limit | Low (optimized for complex wastewater matrices) |
| Optical System | Dual-beam photometry with automatic turbidity and color compensation |
| Sample Delivery | Capacitive volumetric metering |
| Operating Mode | Unattended, long-term remote monitoring |
| Brand | Zming Environmental Technology Co., Ltd. |
|---|---|
| Origin | Jiangsu, China |
| Model | HQ-5302 |
| Instrument Type | Portable |
| Measurement Principle | UV Absorption Spectrophotometry |
| Compliance | Designed for field-deployable water quality monitoring in accordance with standard environmental testing protocols (e.g., ISO 15705:2002, HJ/T 399–2007) |
| Brand | Zming Environmental Technology Co., Ltd. |
|---|---|
| Origin | Jiangsu, China |
| Model | HQ-5101 |
| Instrument Type | Portable |
| Measurement Principle | UV Absorption Spectrophotometry |
| Compliance | Designed for field-deployable water quality monitoring per ISO 7888 (ammonia nitrogen in water), ASTM D1426–22 (ammonia by direct Nesslerization or UV method), and aligned with EPA Method 350.1 (UV spectrophotometric determination of ammonia nitrogen) |
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