Yokogawa SC202G-A-E Conductivity Resistivity Transmitter

The Yokogawa SC202G-A-E transmitter, part of the EXA 202 series, is a 2‑wire conductivity/resistivity transmitter that converts sensor signals into a 4–20 mA output for continuous liquid analysis in industrial processes. It is loop-powered from 24 VDC (operating range 17–40 VDC) and supports communications including HART, PROFIBUS-PA, and FOUNDATION Fieldbus, with an LCD display and diagnostic indicators, and a fault signaling range of 3.6–21 mA. Measurement ranges cover conductivity from 0.01 µS/cm to ~1999 mS/cm and resistivity up to ~999 MΩ·cm, with an accuracy of ~±0.5% full scale; temperature compensation uses IEC NaCl tables, linear or programmable coefficients, and 5×5 matrix compensation. Protection is IP65 / NEMA 4X, mounting options include panel, wall, or pipe, and it offers sensor fault detection and event logging for reliable monitoring in water and wastewater treatment, chemical processing, boiler/condensate monitoring, and high-purity water systems.