609.5 g/kg = 612.487 PSU
| g/kg | PSU |
|---|---|
| 594.5 g/kg | 597.413 |
| 599.5 g/kg | 602.438 |
| 604.5 g/kg | 607.462 |
| 609.5 | 612.487 |
| 614.5 g/kg | 617.511 |
| 619.5 g/kg | 622.536 |
| 624.5 g/kg | 627.56 |
609.5 g/kg = 612.487 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)