507.5 g/kg = 509.987 PSU
| g/kg | PSU |
|---|---|
| 492.5 g/kg | 494.913 |
| 497.5 g/kg | 499.938 |
| 502.5 g/kg | 504.962 |
| 507.5 | 509.987 |
| 512.5 g/kg | 515.011 |
| 517.5 g/kg | 520.036 |
| 522.5 g/kg | 525.06 |
507.5 g/kg = 509.987 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)