Yokogawa Electric Corporation PH402G pH Converter

The Yokogawa EXA PH402G pH/ORP converter is a 4-wire on-line analyzer designed for continuous liquid analysis in industrial environments. It measures pH, ORP, rH, and temperature from high-impedance sensors and uses advanced signal processing to deliver reliable readings. Built-in diagnostics, calibration tools, and control capabilities let it function as both a transmitter and a process controller, with dual 4–20 mA outputs and relay contacts. Housed in an IP65/NEMA 4X field-mounted enclosure, it stands up to harsh conditions. Key specifications include pH range -2 to +16, ORP range -1500 to +1500 mV, temperature range -30°C to +140°C, and power from 115 V AC 50/60 Hz (with variants for 100/230 VAC or 24 VDC). Common applications include water treatment, chemical processing, food and beverage production, and industrial wastewater facilities.