171.5 g/kg = 172.34 PSU
| g/kg | PSU |
|---|---|
| 156.5 g/kg | 157.267 |
| 161.5 g/kg | 162.291 |
| 166.5 g/kg | 167.316 |
| 171.5 | 172.34 |
| 176.5 g/kg | 177.365 |
| 181.5 g/kg | 182.389 |
| 186.5 g/kg | 187.414 |
171.5 g/kg = 172.34 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)