Non-intrusive reflective PH sensors

/ Sensors systems

Ocean Optics'new non-intrusive reflective pH technology comes as the next evolution of our pH sensing product line.

Previous PH sensor products have been based on colorimetric transmissive measurements, and have therefore fallen susceptible to ambient light interferences and sample color or turbidity effects.

Our new approach uses electroformed mesh to metallize the pH sensor material, providing an optically reflective yet ion permeable membrane between the sensor and the environment.

The electroforming process creates highly precise mesh sheets through atom-by-atom electrode position in a plating bath. The hole and wire sizes that can be achieved are on the order of a few microns, with sub-micron repeatability. This novel technique is ideal for our colorimetric sensor applications.

2 versions available

  • 5U rack version, modular from 1 to 4 measurement channels.
  • 29U cabinet version, 4 measurement channels, free space for digitizer integration*

Processing software

  • Visualisation of raw signals (format : bin, wfm, csv)
  • Time-frequency treatment and display
  • Multi-speed visualisation
  • Automatic speed extraction

Composition of the rack version

  • 1 mainframe with high power laser
  • 4 slots for reference laser and detection
  • 1 Ethernet interface
  • 1 processing software
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pH range 5 – 9
Temperature range -6°C / +60°C
Analytical WavelengthTransmissive accuracy 617 nm
Baseline Correction Accuracy 0% at reset point, 1% within 1 pH unit of reset, up to 4ù at 3 pH units from reset.
Resolution ~0.03 pH unit in most cases
Response time (t90) 30 seconds
Calibration requirements (minimum) Factory Calibration: 3 buffers. User Calibration : 5 or 6 buffers
Sterilization Gamma, EtO
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  • environmental research
  • food and beverage processing
  • pharmaceutical and chemical processing
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Composition of the cabinet version

  • 1 High power laser
  • 1 reference laser
  • 1 optical distribution rack
  • 1 Ethernet switch
  • 1 keyboard with integrated mouse
  • 1 processing software
  • All the system is integrated into cabinet1

* the digitizer is not provided – 1 minimal size 29U


  • Optical input/output : E2000/APC
  • Electrical output : SMA
  • Ethernet : RJ45

Related products

  • Optical probes
  • Optical connector viewer 
  • Optical patchords
  • Optical connector cleaner
  • Reflectometer
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