| Type of Material | ε | σ (S/m) |
| Concrete tube | 7 | 0 |
| Plastic tank | 3,3 | 0 |
| Steel tak | 1 | 109 |
| Soil clayey | 28 | 0.01 |
| Air | 1 | 0 |
| Water | 81 | 0.0005 |