鈉離子選擇電極
專門測量0.02 ppm至飽和（10-6 M至5M）鈉（Na +）濃度。
應用包括：發電廠中的蒸汽冷凝器，血液電解質/臨床分析，血清，食品，葡萄酒，海水。
| Model # | NA71502 |
| Slope | 56 ± 3 mV between 10-100 ppm @ 25°C |
| Reproducibility | ± 2% |
| Interferences | Ag+1, Li+1, H+1, K+, Cs+, Tl+ |
| Temperature Range | 0 to 80° C (if calibrated at that temperature) |
| Pressure Range | 0 to 70 psi |
| Response Time | 95% response in 30 seconds |
| Storage | Store in 1 M NaCl |
| Concentration Range | 0.02 ppm to Saturated (1 x 10-6 M to Saturated) |
| pH Range | 5 to 12 pH (depending on Sodium level) |
| Resistance | 300 to 500 megaohms |
| Care, Maintenance & Cleaning | Rinse with a dilute NH4Cl/NH4OH ISA, followed by Soak with 5 M NaCl |
| Isopotential Point | 30 ppm |
| On-Line Capability | Yes, pH control required |
| Applications | Steam Condensates in Power Plants, Blood Electrolytes/Clinical Analysis, Serum, Foods, Wine, Sea Water |