704.5 g/kg = 707.952 PSU
| g/kg | PSU |
|---|---|
| 689.5 g/kg | 692.879 |
| 694.5 g/kg | 697.903 |
| 699.5 g/kg | 702.928 |
| 704.5 | 707.952 |
| 709.5 g/kg | 712.977 |
| 714.5 g/kg | 718.001 |
| 719.5 g/kg | 723.026 |
704.5 g/kg = 707.952 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)