เครื่องวัดคุณภาพน้ำแบบปากกากันน้ำ (Waterproof Pocket Water Quality Meters)
| รุ่น (Model) | Sodium Ion (Na-) | Potassium Ion (K+) | Nitrate Ion (NO3) | Calcium Ion (Ca2+) |
| NA-11 | K-11 | NO3-11 | Ca-11 | |
| Measurement Principle | Ion Selective Electrode | |||
| Minimum Sample Volume | 0.3 ml (0.05 ml with Sampling Sheet B) | |||
| Measurement Range | 0.0 to 14.0 p2 to 9900 ppm (mg/L) (0.1 to 430 mmol/L)H / 0.1 pH | 4 to 9900 ppm (mg/L) (0.1 to 250 mmol/L) 2 to 5000 kg/10a (soil/water ratio 1:5) |
NO3-: 6 to 9900 ppm (mg/L) (0.1 to 160 mmol/L) NO3-N: 1.4 to 2200 ppm (mg/L) |
4 to 9900 ppm (mg/L) (0.1 to 250 mmol/L) |
| Resolution | 0 to 99 ppm: 1 ppm 100 to 990 ppm: 10 ppm 1000 to 9900 ppm: 100 ppm |
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| Maximum Calibration Points | 2 | |||
| mV Range / Resolution | ± 650 mV / 1 mV | |||
| Temperature Display / Resolution | 0 to 500 °C / 0.1 °C | |||
| Functions |
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| Operating Temperature Humidity | 5 to 40 ºC / 85% or less in relative humidity (no condensation) | |||
| Functions |
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| Display | Custom (Monochrome) Digital LCD with Backlight | |||
| Operating Temperature / Humidity | 5 to 40 ºC / 85% or less in relative humidity (no condensation) | |||
