Rosemount conductivity probe model 228 suitable with transmitter model 56 or 1056
The Model 226 and 228 toroidal (inductive) conductivity sensors consist of a pair of wire-wound metal toroids overmolded with either corrosion resistant PEEK or Tefzel®1. When the sensor is immersed in a conductive liquid and an AC voltage is applied to the drive coil, a voltage is induced in the liquid surrounding the coil. The voltage causes an ionic current to flow proportional to the conductance of the liquid. The ionic current induces a current in the receive coil, which the analyzer measures. The
induced current is directly proportional to the conductivity of the solution.