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.

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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