Yokogawa EXA PH402G pH Converter, pH ORP rH Temperature Inputs, 115V 50 60Hz

Description:

The Yokogawa EXA PH402G is used a 4-wire pH/ORP converter designed for continuous on-line liquid analysis in industrial environments. It supports measurement of pH, ORP (redox), rH, and temperature, using high-impedance sensor inputs and advanced signal processing. The unit features built-in diagnostics, calibration tools, and control capabilities, allowing it to function not only as a transmitter but also as a process controller. It is housed in a rugged field-mount enclosure suitable for harsh industrial conditions. 

Applications:

The Yokogawa PH402G converter is used in process control systems for measuring pH, ORP, and temperature in liquids. The Yokogawa converter is commonly installed in water treatment plants, chemical processing systems, food and beverage production, and industrial wastewater facilities for monitoring and controlling process chemistry and product quality.

Technical Specifications:

• Manufacturer: Yokogawa
• Model / Part Number: EXA PH402G
• Product Type: pH / ORP Converter (Analyzer)
• Measurement Inputs: pH, ORP, rH, temperature
• pH Range: approx. -2 to +16 pH
• ORP Range: approx. -1500 to +1500 mV
• Temperature Range: approx. -30°C to +140°C
• Output Signal: Dual 4–20 mA outputs + relay contacts
• Power Supply: 115V AC, 50/60 Hz (also variants for 100/230VAC or 24VDC)
• Enclosure: IP65 / NEMA 4X field-mounted housing
• Features: Sensor diagnostics, temperature compensation, event logbook, built-in PI control

Common Replacements:

• Yokogawa FLXA21 (modern 2-wire replacement)
• Yokogawa FLXA402 analyzer (advanced multi-parameter platform)
• Endress+Hauser Liquiline CM442