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SM29 Electrode for pH/Redox
Brand: Yokogawa Electric CorporationRedox measurements are a potentiometrical measurement of the oxidizing/reducing power of a liquid. To be able to measure this equilibrium of reversible redox reactions the electrodes used should be inert.
Noble electrodes such as Platinum (Pt) and Gold (Au) are widely used for this purpose and seem to approximate the behavior of an ideal inert electrode.
Platinum is used most widely, has excellent chemical resistance but suffers slightly from chemisorption of Oxygen, which slows down its response.
The potential of reference electrodes is depending on their composition. A table with the actual values for each system is given next. All values refer to 25° C. The reference system is also indicated on the text plate of the electrode.
Features- Dome shaped membrane for “Heavy Duty” applications
- Wide range of electrodes to suit almost all process conditions
- Color codes strips for easy identification of electrodes and cables
- High degree of standardisation for mounting in various flow, insertion- and immersion fittings
- Separate electrode system for high accuracy applications
- Reference sensors with a junction made of ceramic, PTFE, pNa glass or Zirconium
- Combination electrode with external liquid earth
Specifications
Approvals & Certifications
- IEC
BSP Connection
- G 1/4” Male
Electrical Connectors
- PG 13.5 (DIN 40430) - SM29D-PT9
Environmental Protection
- IP65
- Watertight
Materials of Construction
- Platinum - Metal Surface
Maximum System Pressure
- psi: 145 (bar: 10, kPa: 1,000)
NACE & NIST
- NIST
Sensor, Probe Diameter
- 0.47” (12 mm)
Sensor, Probe Length
- 4.72” (120 mm)
Sensor, Probe Material
- Ceramic
- pNa Glass
- PTFE
- Zirconium
Temperature Range
- 0° to 130° C (32° to 266° F)
