| Model | PH-107 | PH | PH-108 | PH-108A |
| Range | 0.0~14.0PH | |||
| Resolution | 0.1 pH | |||
| Accuracy | ±0.2pH ±0.1pH(at | ±0.1 pH | ||
| Calibration | 1point | |||
| A T C | | 0 to | ||
| Power | 3×1.5v (LR44) | 4×1.5v(LR44) | ||
| Auto Shut-off | | Approx.8 minutes | | Approx.8 minutes |
| Dimensions | 152×29× | |||
| Weight | | |||
| Model | PH-98107 | PH-98108 |
| Range | 0.00~14.00PH | |
| Resolution | 0.01 pH | |
| Accuracy | ±0.1pH | ±0.05pH |
| Calibration | 2 point | |
| A T C | | 0 to |
| Power | 4×1.5v (LR44) | |
| Dimensions | 175×41× | |
| Weight | | |



















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