The Yokogawa PH202G-U-E is a dual-input pH and ORP transmitter (analyzer) that converts high-impedance sensor signals into a 4–20 mA process output, with optional digital communication (HART or Fieldbus). It operates on a 2‑wire loop-powered supply, typically ~24 VDC, and is housed in an IP65 / NEMA 4X field-mounted enclosure for wall, pipe, or panel installations. Key features include temperature compensation, sensor diagnostics, and a calibration logbook to support reliable monitoring of pH and redox (ORP) in industrial process control and data acquisition systems.
