| serial number | Specification name | Technical specifications |
| 1 | Test Methods | Tetrasulfonate porphyrin spectrophotometry |
| 2 | Measuring range | 0~10mg/L range can be customized |
| 3 | lower limit of quantification | ≤0.2mg/L |
| 4 | resolution | 0.001 |
| 5 | Indication error | ±5% |
| 6 | Precision | ≤5% |
| 7 | zero drift | ±5% |
| 8 | Range drift | ±10% |
| 9 | Output Interface | RS232, RS485,4-20mA |
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