The square wave signal is selected as an excitation voltage for the conductivity cell for the ease for processing. It provide 4-20mA dc signal on the same two wire which carry the 24 V DC for conductivity measurement. The transmitter is an ideal choice for Linearized measurement with standard conductivity cell. Temperature of the liquid is monitered by a RTD element and compensation is provided over the complete operating range. It provides a current output signal of 4 – 20 mA DC capable of driving a load of upto