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| Product Name | SMART SENSOR PH818M Pen pH Meter | SMART SENSOR PH838 Pen pH Meter |
| Product Price | $163.00 | $104.00 |
| Details | Details | |
| Model comparison | ||
| type | Pen style | Pen style |
| Measuring range | 0~14PH | 0~14PH |
| precision | ±0.05 | ±0.05 |
| Annex | ||
| Parameter comparison | ||
| PH Measurement Range | 0.00~14.00 PH | 0.00~14.00pH |
| PH measurement intrinsic error | ±0.05PH | ±0.05pH |
| Stability measurement | ±0.03 | |
| Solution temperature compensation Range | 0℃~70℃ | 0℃~70℃ |
| Instrument Repeatability | ±0.01 | ±0.03 |
| Temperature Range of tested solution | 0℃~60℃ | 0℃~60℃ |
| power supply | 1.5V (AAA) battery | 2 1.5V (AAA) batteries |
| display screen | LCD large screen display | LCD large screen display |
| Operating temperature | 0℃~50℃ | 0℃~50℃ |
| Environmental humidity | ≤85%RH | ≤85%RH |
