YOKOGAWA EXA PH402 CONVERTER FOR PH ORP ANALYZER TRANSMITTER (O2)

Description:

The Yokogawa EXA PH402 pH/ORP Converter is used in industrial liquid analysis systems to measure pH and ORP values and convert sensor signals into standardized outputs for process control. Commonly installed in chemical plants, water treatment facilities, and industrial process systems where continuous pH monitoring is required. Maintenance teams, OEMs, and system integrators use this converter for process monitoring, replacement of legacy analyzers, and maintaining accurate liquid analysis.

Applications:

The Yokogawa PH402 is used in industrial environments to monitor and control pH and oxidation-reduction potential (ORP) in liquid processes. It is commonly deployed in wastewater treatment, chemical processing, food and beverage production, and power generation systems. The converter integrates with pH/ORP sensors to provide real-time measurement, diagnostic feedback, and control outputs, ensuring stable process conditions and regulatory compliance.

Technical Specifications:

• Manufacturer: Yokogawa
• Model / Part Number: PH402
• Product Type: pH / ORP Converter (EXA Series)
• Measurement Type: pH and ORP (Redox)
• Input: pH/ORP sensors with high impedance dual input
• Output Signals: Dual 4–20 mA outputs + relay outputs
• Control Capability: Built-in PI control via analog outputs and relays
• Communication: Digital communication capability (model dependent)
• Display: LCD interface with configuration and diagnostics
• Housing: IP65 / NEMA 4X enclosure
• Calibration: Microprocessor-aided calibration with buffer tables
• Diagnostics: Sensor diagnostics including impedance, stability, and response checks
• Temperature Compensation: Automatic compensation for process variation
• Mounting: Panel or field mount installation
• Product Status: Discontinued (legacy EXA series analyzer)

Common Replacements:

• Yokogawa FLXA21 pH Analyzer
• Yokogawa FLXA202 pH Analyzer
• Yokogawa PH450G Converter