YOKOGAWA PH ORP CONVERTER EXAxt450 PH450G

Description:

The Yokogawa PH450G EXAxt450 pH/ORP Converter is used a 4-wire industrial analyzer designed for continuous measurement of pH, ORP (Redox), and temperature in liquid processes. It converts high-impedance sensor signals into standard 4–20 mA outputs and provides advanced diagnostics, calibration, and control capabilities for integration into PLC/DCS systems. The EXAxt450 series combines high accuracy, touchscreen operation, and robust industrial design for demanding environments. 

Applications:

The Yokogawa PH450G is used in industrial environments for continuous online monitoring of pH and ORP in liquid processes. It is commonly deployed in wastewater treatment, chemical processing, food and beverage production, and power generation systems. The analyzer supports measurement, alarm handling, and control outputs for chemical dosing or neutralization, ensuring process stability and compliance.

Technical Specifications:

• Manufacturer: Yokogawa
• Model / Part Number: PH450G (EXAxt450 Series)
• Product Type: pH / ORP Converter (4-wire analyzer)
• Measurement Range: pH -2 to 16, ORP -1500 to +1500 mV
• Input: Dual high-impedance inputs (≥10¹²–10¹³ Ω)
• Output Signals: Two isolated 4–20 mA outputs + 4 relay outputs (SPDT)
• Communication: HART communication supported
• Control Capability: Full PID control via mA or relay outputs
• Accuracy: ≤0.01 pH, ≤1 mV ORP
• Temperature Compensation: Automatic + advanced algorithms (NEN6411, linear, matrix)
• Display: High-resolution touchscreen HMI
• Enclosure: IP66 / NEMA 4X industrial housing
• Mounting: Panel, wall, or pipe mount
• Function: Continuous liquid analysis + control + diagnostics
• Application Environment: Industrial process control systems

Common Replacements:

• Yokogawa FLXA21 pH Analyzer
• Yokogawa FLXA202 pH Analyzer
• Yokogawa PH450G (newer configurations / variants)