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| Product Name | QiWei PH-220 pH Meter (pen type) | YUEFENG PHB-4 Portable acidity Meter |
| Product Price | $103.00 | $197.00 |
| Details | Details | |
| Model comparison | ||
| type | Pen style | Portable |
| Measuring range | 0~14PH | 0~14PH |
| precision | ±0.02 | ±0.01 |
| Annex | ||
| Parameter comparison | ||
| PH Measurement Range | 0.1~14pH | |
| PH Measurement accuracy | ±0.02pH | ±0.01pH |
| PH calibrated | PH: 25 ℃ three point calibrated (4.01, 6.86, 9.18) | |
| resolution | 0.01pH | |
| Measurement Range | 0~50℃/32~122℉ | 0~80℃ |
| Measurement accuracy | 1℃ | |
| Temperature resolution | 0.1℃(1℉) | 0.1℃ |
| Permissible Ambient Temperature | 0~50℃ | |
| power supply | 1.5V battery (LR44) * 4PCS | 6V regulated power supply, 4 AA batteries |
| Dimension | Φ40*185mm | |
| weight | 88g | |
