SR20 Electrode for pH/Redox

Brand: Yokogawa Electric Corporation

A non-flow type reference electrode can be used for processes that don’t contain components that poison the reference system. 

The gel-type electrodes have a large area of porous PTFE junction for optimal resistance against electrode pollution. 

The SR20-AP26 electrode is the optimal choice for processes that cannot stand contamination with KCl. 

The SR20-AC22 electrode has a flexible PTFE tube. 

Therefore this electrode can be applied in processes with frequent temperature- and pressure fluctuations.
Features
  • Easy maintenance
  • No reference liquid wastage
  • Maximum process pressure: 1,000 kPa (10 bar)
  • High quality Ag/AgCl reference system (pin) which can stand high temperatures
  • Liquid flow output preventing diaphragm fouling and poisoning the reference system
  • High quality Ag/AgCl reference system (pin) which can stand high temperatures and temperature fluctuations
  • Standard 3.3 m. KCl electrolyte, at temperature above 70º C thickened electrolyte is advised
  • Automatic compensation for process pressure variations
  • Chemical resistant viton bellow material
  • Constant flow of reference liquid, independent of the process pressure variations for minimal diffusion potential
  • Suitable for pure water applications and for polluting fluids
  • Refillable, large KCl reservoir

Specifications

Applications

  • Dirty or Pure Liquids
  • High Temperatures
  • Polluting or Non-Polluting Fluids

BSP Connection

  • G 1/4” Male

Diaphragm Material

  • Ceramic - SR20(D)-AC22, SR20(D)-AC32
  • PTFE - SR20(D)-AP24, SR20(D)-AP26
  • Sleeve - SR20(D)-AS52

Environmental Protection

  • IP65
  • Watertight

Flow Rate

  • Maximum

Materials of Construction

  • Chemical Resistant Viton - Bellow Material
  • Mounting Kit Body: AISI 316 Stainless Steel - SR20-AC32
  • Ryton R4 - Electrode Mounting Set
  • Silver Chloride - Electrodes

Maximum System Pressure

  • psi: 145 (kPa: 1,000, bar: 10)

NACE & NIST

  • NIST

O-Ring Material

  • Mounting Kit: Silicone
  • Mounting Kit: Viton

Pressure Range

  • psi: 0 to 150 (kPa: 0 to 1,000, bar: 0 to 10)

Resistance

  • < 10 kiloohms at 25° C (77° F) - Diaphragm Resistance for Flow
  • < 5 kiloohms at 25° C (77° F) - Diaphragm Resistance for Non-Flow

Ring Material

  • Mounting Kit: Rubber
  • Mounting Kit: Silicone

Screw Material

  • Mounting Kit: AISI 316 Stainless Steel - Screw Piece

Sensor, Probe Material

  • Ceramic
  • pNa Glass
  • PTFE
  • Zirconium

Temperature Range

  • 0° to 120° C (32° to 248° F)

  • Dirty or Pure Liquids
  • High Temperatures
  • Polluting or Non-Polluting Fluids
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