| 摘要 |
A probe ( 1 ) for measuring the conductivity of a solution comprises a hydraulic part and an electronic part; the hydraulic part comprises a conduit ( 2 ) in the shape of a double tuning fork having an inlet ( 3 ) and an outlet ( 4 ) for the solution whose conductivity is to be measured; the electronic part comprises an energizing toroidal coil ( 7 ) and a receiving toroidal coil ( 22 ), both fitted round the conduit ( 2 ); the receiving coil ( 22 ) is mutually concatenated with the energizing coil ( 7 ) through an electromagnetic flux (F) generated by the energizing coil ( 7 ) in the respective toroid (T 1 ) and through the solution circulating in the conduit ( 2 ); the probe ( 1 ) also comprises a feedback circuit ( 111 ) to keep the electromagnetic flux (F) constant. |
