| 摘要 |
A probe (1) for measuring conductivity of a fluid by means of coupled current between two coils (7) and (8). The probe (1) is protected against corrosive fluid eg hydrogen fluoride by being sheathed in a poly vinylidene fluoride casing (15), (19); (20), (2), (3) and a secondary protection is provided by PTFE wrapping for the cores of the coils and PTFE insulation for cables to the cores. Coils (7), (8) are toroidally wound and are respectively connected to a signal source (4) and a detector (5). <IMAGE> |
