Electrodeless 4-20 mA LoopConductivity Sensor with RS485 – Modbus RTU
This sensor measures electrical conductivity and TDS using the inductive method. Thanks to the analog and digital outputs, the sensor can be connected to the most common PLC’s or data acquisition boards. MC 6587 and MC 7687
multi-channel controllers allow complete management of up to three sensors, displaying the measurements and the messages that guide calibration and configuration.
Measuring Method
The electodeless conductivity sensor consists of two windings on toroidal coils, placed side by side, embedded in a plastic material and therefore not in contact with the sample. A through hole allows the solution to close an imaginary electrical circuit around them. An alternating voltage is applied to the transmitter coil while a current proportional to the conductivity of the sample is measured on the detector coil. The TDS value is calculated by applying a programmable conversion factor.
