Yokogawa SC21-AAP26 Combined pH Sensor PED

Description:

The Yokogawa SC21-AAP26 Combined pH Sensor is used an industrial 12 mm combination electrode designed for continuous pH measurement in process applications. It integrates the measuring glass electrode, reference electrode, and temperature capability into a single sensor body. The design includes a durable glass membrane and a gel-filled electrolyte system, providing stable measurement and reduced maintenance in harsh environments.

Applications:

The Yokogawa SC21-AAP26 is used in industrial environments for continuous pH monitoring in liquid processes. It is commonly deployed in wastewater treatment, chemical processing, power generation, and food & beverage systems. The sensor is suitable for both general-purpose and moderately harsh applications where fouling resistance and long-term stability are required.

Technical Specifications:

• Manufacturer: Yokogawa
• Model / Part Number: SC21-AAP26
• Product Type: Combined pH Sensor / Electrode
• Measurement Range: pH 0–14
• Temperature Range: 0 to ~110 °C
• Pressure Rating: Up to ~500 kPa
• Glass Resistance: ~250–400 MΩ @ 25°C
• Reference System: Ag/AgCl (silver/silver chloride)
• Junction Type: PTFE (high fouling resistance)
• Electrolyte: Gel-filled, maintenance-reduced design
• Construction: 12 mm industrial electrode, PG13.5 connection
• Function: Measures pH in liquid processes with integrated reference system

Common Replacements:

• Yokogawa SC21-AGP26
• Yokogawa SC21-ALP26
• Yokogawa SC25V Series