Yokogawa SR20-A32 Industrial Ph Electrode Reference Sensor

Description:

The Yokogawa SR20-A32 Industrial pH Electrode Reference Sensor is used a single reference electrode designed for use in industrial pH measurement systems. It provides a stable reference potential required to complete the measurement loop when paired with a glass pH electrode. The sensor is part of Yokogawa’s SR20 series and is engineered for reliable operation in continuous process environments, helping maintain accurate and stable pH readings. 

Applications:

The Yokogawa SR20-A32 is used in industrial liquid analysis systems for accurate pH measurement. It is commonly deployed in water and wastewater treatment, chemical processing, power generation, and food & beverage applications. The reference electrode ensures a stable electrical connection between the measurement system and the process liquid, which is critical for consistent and reliable pH readings.

Technical Specifications:

• Manufacturer: Yokogawa
• Model / Part Number: SR20-A32
• Product Type: pH Reference Electrode
• Measurement Role: Provides stable reference potential in pH loop
• Reference System: Ag/AgCl (silver/silver chloride typical)
• Electrolyte: KCl-based reference solution
• Junction Type: Ceramic / process-dependent variants
• Temperature Range: Up to ~120 °C (series dependent)
• Pressure Rating: Up to ~1 MPa (~145 PSI typical)
• Mounting: Compatible with Yokogawa immersion, flow, or insertion fittings
• Function: Completes measurement circuit and stabilizes pH signal
• Construction: Industrial electrode with replaceable or refillable design

Common Replacements:

• Yokogawa SR20-AC32 (flowing reference electrode)
• Yokogawa SR20-AS52 (sleeve junction variant)
• Yokogawa SC21 combined pH electrode