C550 Series Conductivity Sensor Transmitter Tough but sensitive — High performance with industrial strength graphite + PPMA electrode. The ProCon® C550 series double electrode conductivity sensor transmitter has been proven to operate seamlessly in industrial applications up to 200,000µS/cm. Measuring specific conductivity of aqueous solutions is becoming increasingly important for determining impurities in water. The measurement accuracy is greatly affected by temperature variation, polarization of the contact electrode surface, and cable capacitance. The ProCon® line of analytical sensor transmitter have been designed for difficult industrial applications and to outperform even in extreme conditions. The 2-wire 4-20mA, 4-wire or 4-20mA + RS485 output options simplify calibration and communication with remote displays and controllers.pH analytical sensor transmitter probe