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      Product

      OceanOpticsSpectrometer>> Oxygen Sensors System>>FOXY Sensor Formulation  

      FOXY Sensor Formulation


      Our Oxygen Sensing Probes with the FOXY Formulation applied are designed for monitoring partial pressure of oxygen in benign gasses and aqueous liquids. Standard FOXY probe tips are covered with a layer of hydrophobic sol-gel material with a ruthenium compound trapped in the sol-gel matrix. When excited by an LED, the ruthenium complex fluoresces. If the excited ruthenium complex then encounters an oxygen molecule, the excess energy quenches the fluorescent signal. The fluorescence intensity or phase shift is measured by an Ocean Optics spectrometer or NeoFox system, and is related to the partial pressure of oxygen.

      Choosing a Probe
      Once you choose the best Sensor Coating Formulation for your application, you need to select the fiber optic probe onto which the sensor coating is applied. For a list of fiber optic probes, click here.

      FOXY Coating Specifications

      Specification  
      Principle Photoluminescence-quenching using Ru compound. Measures O2 partial pressure.
      Sensor mechanism Phase shift due to change in partial pressure of O2
      Applications Benign environment, aqueous liquids and vapors
      Time-constant (µsec) dynamic range Air: 2.50, N2: 5.00; Low 1.00, High 7.00
      Accuracy: (0–20% O2, 0–50ºC) <5% of reading (using polynomial fit to multipoint calibration)
      Response time of probe with no overcoat <1 second in gas, 30-45 seconds in liquid
      Response time of dissolved oxygen in liquid (with overcoat) 30-45 seconds
      Response time of probe with Overcoat of Oxygen Gas (at 1 atmosphere) 30-60 seconds
      Dynamic range of Dissolved Oxygen in liquid 0–40.7 ppm; 0–760 mm Hg partial pressure
      Dynamic range of Oxygen Gas (at 1 atmosphere) 0–100% (mole percent); 0–760 mm Hg partial pressure
      Stability Dissolved Oxygen in liquid Drift<0.01 ppm per hour
      Stability Oxygen Gas (at 1 atmosphere) Drift ~0.03% O2 per hour
      Resolution of Dissolved Oxygen in liquid 0.02 ppm at room temperature
      Resolution of Oxygen Gas (at 1 atmosphere) 0.05% (0.4 mmHg) at room temperature
      Lowest detectable limit of Dissolved Oxygen in liquid 0.02 ppm
      Lowest detectable limit of oxygen gas (at 1 atmosphere) 0.05% (0.4 mm Hg)
      Overcoat available Yes, order FOXY-AF or FOXY-AF-MG
      Temperature range -50ºC to +80ºC
      Temperature Temperature sensor and software-supported compensation
      Temperature recalibration Only when probe is replaced/refurbished
      Probe lifetime Reconditioning recommended once per year
      pH operating range 1-10 pH
       
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