488.5 g/kg = 490.894 PSU
| g/kg | PSU |
|---|---|
| 473.5 g/kg | 475.82 |
| 478.5 g/kg | 480.845 |
| 483.5 g/kg | 485.869 |
| 488.5 | 490.894 |
| 493.5 g/kg | 495.918 |
| 498.5 g/kg | 500.943 |
| 503.5 g/kg | 505.967 |
488.5 g/kg = 490.894 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)