ORP1000 Oxygen Reduction Potential Sensor

The ORP1000 is a fully submersible sensor, well proven to withstand harsh field conditions. The sensor requires a low voltage power supply and provides a calibrated 4–20 mA output.

The sensor utilises a robust Platinum electrode together with optical isolation and advanced signal conditioning to ensure long term accurate data. The electrode’s reference is protected by a special porous PTFE ring which is impregnated with a special conductive gel. The protection ring prevents chemical or biological fouling from reaching the reference, extending the life of the electrode. At the end of its life, the electrode can be replaced by the user in the field without the need to return the sensor to the factory.

The ORP1000 sensor comes fitted with a moulded polyurethane cable.


  • Innovative, optically isolated signal conditioning
  • Field proven platinum electrode
  • Innovative replaceable reference protection ring
  • Robust, easy clean design
  • Low power energy requirements
  • Wide operating temperature range


  • Rugged electrode design provides unparalleled remote operations
  • Operation on remote power source for long periods
  • High reliability means critical measurements are not lost through sensor down time
  • Minimal field servicing and reduced field visits
  • Long term unattended operation

Measurement Technique: Platinum electrode with internal reference, Field Replaceable electrode

Sensor range (factory calibrated): +/–500 mV, +/–1000 mV, 0–1000 mV

Sensor output: Analogue 4-20 mA

Power Supply: 11–13.2V DC

Dimensions (L x OD) 364.5 mm × 47 mm (14.35″ × 1.85″)

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