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AlpHa Measurement Solutions |
Oxidation-Reduction Potential in Power Generation

ORP in Power Generation

Oxidation-reduction potential (ORP or REDOX) monitoring and control is a required parameter throughout the power generation process. With proper baseline data and understanding of the water matrix, ORP is a useful tool to prevent catastrophic feed water corrosion in ferrous and similar piping systems. It is desirable to maintain a constant reducing environment in this process water (oxygen scavenging treatment) and ORP monitoring provides assurance. For example, nuclear power plants use ORP to control the addition of hydrogen to minimize corrosion and cracking in the reactors.

Oxidation-Reduction Potential in Power Generation

ORP Sensor Capabilities

  • Full Range: -1999 to +1999 mV (meter dependent)
  • Accuracy: ±0.1 mV (meter dependent)
  • Temperature Range: -5 to 135°C
  • Tuff-Tip Option
  • Custom Mechanical Assemblies Available
  • Warranty: 12 months

Configuration Options

  • Form Factor
    • 12 mm
    • Cartridge
    • Process Body
    • Custom Options Available
  • Housing Material Options
    • PVC / CPVC
    • Ryton® (PPS)
    • ABS
    • Epoxy
    • Polycarbonate
    • Kynar® (PVDF)
    • Polyethylene
    • PEEK
    • Teflon™ (PTFE)
    • Ultem® (PEI)
    • Glass
    • Metal
      • Stainless Steel
      • Other Metals Available
  • Thermistor Options
    • PT100 (type A & B)
    • PT1000
    • 10 kohm
    • 30 kohm
    • 100 kohm
    • Any commercially available thermistors and custom options
    • Common temperature accuracy is ±0.3°C and can vary based on thermistor option chosen
  • Reference System
    • Ag / AgCl
    • Differential
    • Custom Options Available
  • Reference Junction Options
    • Double Junction
    • Single Junction
    • Custom Options Available
  • Reference Junction Material / Design
    • Porous Plastic (PTFE / HDPE / PP)
    • Ceramic Pin / Annular / Disc
    • Fiber / Pellon
    • Sleeve Junction / Free Flow (liquid / liquid or ground glass joint)
    • Open Aperture 
    • Solid State
    • Custom Options Available
  • Solution Ground
    • Integrated in Thermowell
    • Integrated in Body Housing
    • Stand-alone
    • Custom Options Available
  • Reference Electrolyte
    • Sealed
      • Soft Gel
      • Solid Gel
    • Refillable
      • Liquid
      • Soft Gel
    • Custom Options Available
  • ORP Sensor Shape 
    • Disc
    • Single Band
    • Double Band
    • Pin
  • ORP Sensor Material
    • Platinum
    • Gold
    • Silver
    • Custom Options Available
  • Integrated Insertions
    • 3/4" NPT
    • 1/2" NPT
    • 1" NPT
    • PG 13.5
    • Custom Options Available

Communication and Connection Options

  • Analog
    • Millivolts
    • 4 – 20 mA
    • 0 – 5 V
    • 0 – 10 V
    • Custom Options Available
    • Custom options available with preamp capabilities
  • Digital
    • RS-485 MODBUS RTU
    • Custom Options Available 
  • Connectors
    • Integrated Connectors (detachable or cableless)
      • S7
      • S8
      • Integrated BNC
      • Variopin
      • Custom Options Available 
    • Connectors with Cables (including temperature)
      • BNC
      • DIN
      • MOLEX
      • Mil-spec
      • 2.5 mm / 3.5 mm phono
      • RCA
      • Spade Lugs
      • Tinned Leads
      • LEMO
      • Circular connectors
      • Any commercially available connectors and custom options available

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