406.5 g/kg = 408.492 PSU
| g/kg | PSU |
|---|---|
| 391.5 g/kg | 393.418 |
| 396.5 g/kg | 398.443 |
| 401.5 g/kg | 403.467 |
| 406.5 | 408.492 |
| 411.5 g/kg | 413.516 |
| 416.5 g/kg | 418.541 |
| 421.5 g/kg | 423.565 |
406.5 g/kg = 408.492 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)