| Parameter | Specification |
| Model | ZD-2 |
| pH Measurement Range | 0.00 – 14.00 pH |
| mV Measurement Range | 0 – ±1400 mV |
| pH Resolution | 0.01 pH |
| mV Resolution | 1 mV |
| pH Accuracy | ±0.03 pH ±1 bit |
| mV Accuracy | ±5 mV ±1 bit |
| Input Impedance | 3 × 10¹¹ Ω |
| Stability | ±0.01 pH / 3 h |
| Endpoint Control Accuracy | ±0.1 pH or ±5 mV ±1 bit |
| Volume Analysis Repeatability | 0.2% |
| Titration Modes | Manual, Automatic, Constant pH/Potential |
| Titration Speed Control | Magnetic Valve |
| Output Signal | 0–1 mV |
| Feature | ZD-2 Automatic Potentiometric Titrator | Manual Titration Method |
| Endpoint Detection | Automatic | Visual Observation |
| Accuracy | High | Operator Dependent |
| Repeatability | Excellent | Moderate |
| Titration Speed Control | Automatic Magnetic Valve | Manual |
| Constant pH Titration | Supported | Not Available |
| Labor Requirement | Low | High |
| Human Error Risk | Minimal | Higher |
| Data Consistency | Excellent | Variable |