405.5 g/kg = 407.487 PSU
| g/kg | PSU |
|---|---|
| 390.5 g/kg | 392.413 |
| 395.5 g/kg | 397.438 |
| 400.5 g/kg | 402.462 |
| 405.5 | 407.487 |
| 410.5 g/kg | 412.511 |
| 415.5 g/kg | 417.536 |
| 420.5 g/kg | 422.56 |
405.5 g/kg = 407.487 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)