| Types | DN15 | DN20 | DN25 |
| Accuracy | Class2 | ||
| leakage | 1.6Mpa water pressure, no leakage within 15 minutes. | ||
| lenght | 165mm | 195mm | 225mm |
| Overload flow | 3.125m³/h | 5m³/h | 7.875m³/h |
| parmanent flow | 2.5m³/h | 4m³/h | 6.3m³/h |
| Transitional flow | 0.05m³/h | 0.08m³/h | 0.126m³/h |
| Minimum flow | 0.0313m³/h | 0.05m³/h | 0.0788m³/h |
| Starting flow | ≤0.012m³/h | ≤0.016m³/h | 0.020m³/h |
| Lowest reading | 0.0001m³ | ||
| Largest reading | 99999.9999m³ | ||
| Small flow errors | ≤±5% | ||
| Flow errors | ≤±2% | ||
| Work temperature : | 0℃—30℃(water meter) | ||
| Work pressure : | 0.0——1.0Mpa |
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