• Fast (< 1 sec)
• Dynamic Range
  • FOXY & HIOXY  0 - 100%
  • FOSPOR 0 - 5%
• Sensitivity (gaseous)
  • FOXY & HIOXY 0.05%
  • FOSPOR 0.005%
• Sensitivity (dissolved O2)
  • FOXY & HIOXY 0.02 ppm
  • FOSPOR 0.002ppm
• Accurate (5% of reading)
• No Oxygen Consumption
• Responds only to pO2
• Use in gases, liquids, slurries
• Available as fiber probes or remotely sampled patches

Spectrecology sells sensors based on the finest materials in the world. Our sol-gel sensor materials are the culmination of over 15 years of R&D effort. No one makes fluorescent sensors with the stability and durability of our FOXY line. Originally developed for oceanographic use, these sensors are deployed in aircraft fuel tanks, bioreactors, chemical reactors, respitory therapy devices, food and pharmaceutical packaging plants, brain tisse, soil, tree sap and even CO2 lasers.

•  Fiber Optic Oxygen Sensor Probe Options

  Fiber Optic Oxygen Sensors consist of an optical fiber polished to an angled surface and coated with a thin layer of sol-gel containing the active fluorophore. The probes can be made in many styles, depending on the requirement for size, ruggedness etc. If you don't find a style that meets your needs, ask us. We can easily build custome versions. Fiber Optic Oxygen Sensors are designed for use with our modular components. First select a Sensor Coating Formulation. Then select a Fiber Optic Probe onto which the sensor coating will be applied. The select an optical fiber and the NEOFOX electronics package of your choice. Need help? Just call us and we'll pick the best components for you.

  The tables below list various off-the-shelf probes and the reccomended bifurcated fiber assembly.

  

  R Sensor Probe

  

   Our standard lab probe is called the R probe. It is a 1/16" OD stainless steel ferrule with a 1000 um fiber.

   

   

  Probe Assembly:	1000 µm fiber in a stainless steel 1/16" OD ferrule
  Dimensions:	1.587 mm OD, 152.4 mm length
  Pressure:	300 psi
  Fiber:	BIFBORO-1000-2
  Termination:	SMA 905
  Typical Usage:	general purpose

  

  AL300

  The AL300 is a 500 µm OD (300 µm core diameter) aluminum-jacketed optical fiber probe for applications that require fine spatial resolution.
  

  Probe Assembly:	300 µm aluminum-jacketed fiber assembly
  Dimensions:	500 µm OD, 1 m length
  Pressure:	300 psi
  Fiber:	BIFBORO-300-2
  Termination:	SMA 905
  Typical Usage:	fine spatial resolution applications
  Price:	$577

   

  

  18G

  The 18G is a 300 µm optical fiber housed in an 18-gauge stainless steel needle probe.
  *Refurbishing not available on this item

   

  Probe Assembly:	300 µm optical fiber, 18-gauge tip
  Dimensions:	1.27 mm diameter, 90 mm length tip
  Pressure:	300 psi
  Fiber:	BIFBORO-300-2
  Termination:	SMA 905
  Typical Usage:	penetration of vial septa and rigid packaging
  Price:	$692

   

  

  21G

  The 21G is a 300 µm optical fiber housed in a 21-gauge stainless steel needle probe.
  *Refurbishing not available on this item
  

  Probe Assembly:	300 µm optical fiber, 21-gauge tip
  Dimensions:	813 µm diameter, 90 mm length tip
  Pressure:	300 psi
  Fiber:	BIFBORO-300-2
  Termination:	SMA 905
  Typical Usage:	penetration of soft packaging
  Price:	$692

   

  

  OR125

  The OR125 is a 1/8" OD optical fiber probe used as a direct replacement for 1/8" OD O₂ electrodes.
  

  Probe Assembly:	1000 µm optical fiber, stainless steel ferrule
  Dimensions:	3.175 mm OD, 63.5 mm length
  Pressure:	300 psi
  Fiber:	BIFBORO-1000-2
  Termination:	SMA 905
  Typical Usage:	direct replacement for 1/8" OD O2 electrodes
  Price:	$692

   

  

  OR125G

  The OR125 is a 1/8" OD optical fiber probe used as a direct replacement for 1/8" OD O₂ electrodes.
  

  Probe Assembly:	1000 µm optical fiber, stainless steel ferrule
  Dimensions:	3.175 mm OD, 63.5 mm length
  Pressure:	300 psi
  Fiber:	BIFBORO-1000-2
  Termination:	SMA 905
  Typical Usage:	direct replacement for O-ring grooved electrodes
  Price:	$692

   

  

  OR125GT

  The OR125 is a 1/8" OD optical fiber probe used as a direct replacement for 1/8" OD O₂ electrodes.
  
  

  Probe Assembly:	1000 µm optical fiber, titanium ferrule
  Dimensions:	3.175 mm OD, 63.5 mm length
  Pressure:	300 psi
  Fiber:	BIFBORO-1000-2
  Termination:	SMA 905
  Typical Usage:	direct replacement for O-ring grooved electrodes
  Price:	$751

   

  

  T1000

  The T1000 is a 6.35 mm OD optical fiber probe used in process environments and high-pressure applications.
  

  Probe Assembly:	1000 µm optical fiber, stainless steel ferrule
  Dimensions:	6.35 mm OD, 177.8 mm length
  Pressure:	3000 psi
  Fiber:	BIFBORO-1000-2
  Termination:	SMA 905
  Typical Usage:	process environments, high-pressure applications
  Price:	$1154

   

  

  T1000-RTD

  The T1000-RTD is a 6.35-mm OD optical fiber probe with an embedded RTD used in process environments. The T1000 RTD can only be used in conjunction with the USB-LS-450.

   

  Probe Assembly:	1000 µm optical fiber, 1/8" OD stainless steel
  Dimensions:	6.355 mm OD, 177.8 mm length
  Pressure:	300 psi
  Fiber:	BIFBORO-1000-2
  Termination:	SMA 905
  Typical Usage:	process environments, includes embedded RTD
  Price:	$1732

   

  

  PI600

  The PI600 is a silicone-jacketed, polyimide-coated optical fiber probe used in environments where a non-metallic probe is required.
  

  Probe Assembly:	600 µm optical fiber with silicone jacketing*
  Dimensions:	710 µm OD, 2 m length
  Pressure:	300 psi
  Fiber:	BIFBORO-600-2
  Termination:	SMA 905
  Typical Usage:	environments where non-metallic probe is indicated
  Price:	$577

  * 200 µm also available. Please call us for details.

  

  Optional Probe Silicone Overcoats

  Optional coatings of silicone (both standard and medical-grade) can be applied to Probes to exclude ambient light, improve chemical resistance and eliminate refractive index effects. We recommend an overcoat if your application involves liquids, as well as those that involve changing from gases to liquids, as scattering effects could result in the sensor losing calibration. There is no charge for these overcoats.

  Item	Description	Response in Gases	Response in Liquids
  -AF	RTV silicone adhesive overcoat (increases probe response time)	10-30 seconds	15-45 seconds
  -AF-MG	High-strength RTV silicone adhesive overcoat is a medical implant-grade silicone	15-45 seconds	45-60 seconds (depending on sample viscosity)

   

Remote Detection! -- That's right! We can sense the fluorescent decay time from a distance. Our Red Eye patches can be put on the inside of package, vial, respirometer, you name it. Point the fiber optic probe at the patch and get a fast accurate answer.

For details on O2 sensing patches, click here!

 Sol gel formulations for different applications...   The design of the fluorophore and the sol gel matrix is carefully controlled to optimize the coatings for specific purposes. Rutenium complexes are quenched over a broad range of pO2 levels and are excellent as general purpose probes. Pt complexes offer higher sensitivity over a narrow range of pO2 levels. The sol gel is made to exclude the various species that offer competitive quenching, and by doing this make the probes specific for O2. Our standard formulation is hydrophobic yet permeable to O2. Our HIOXY formulation excludes both polar and non polar molecules making it ideal for use in organic solvents.

FOXY Coating 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 MFPF system, and is related to the partial pressure of oxygen.

FOSPOR Coating Formulation

The FOSPOR coating is applied to the distal end of the fiber and has a fluorescence-based Pt-porphyrin indicator. The sensor uses fluorescence quenching of the porphyrin to measure the partial pressure of dissolved or gaseous oxygen. The FOSPOR coating can be applied to substrates other than fibers and probes and used for applications such as through-packaging measurements in the food and pharmaceutical industries. *Please contact an Applications Scientist before specifying FOSPOR or other coatings.

HIOXY Coating Formulation

Two years of research and development pursuing a high-performance oxygen sensor compatible with hydrocarbon environments has resulted in our new HIOXY sensor. The HIOXY sensor is designed for monitoring oxygen partial pressure in non-aqueous vapors and solutions. The sensor coating chemistry is ideal for use with oils, alcohols and hydrocarbon-based vapors and liquids. HIOXY has been tested successfully in commercial and military aviation fuels, gasoline, diesel, some alcohols, glycol, military hydraulic fluids and wine analysis.

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.

Sensor Coating Specifications

Specification	FOXY Probes	FOSPOR Probes	HIOXY Probes
Principle	Photoluminescence-quenching using Ru compound. Measures O2 partial pressure.	Photoluminescence-quenching using Pt compound. Measures O2 partial pressure.	Photoluminescence-quenching using Ru compound. Measures O2 partial pressure.
Sensor mechanism	Phase shift due to change in partial pressure of O2	Phase shift due to change in partial pressure of O2	Phase shift due to change in partial pressure of O2
Applications	Benign environment, aqueous liquids and vapors	Low O2 (0–5%), vacuum systems packaging, benign environment	Hydrocarbon-based liquids and vapors, fuels, alcoholic beverages, vegetable oil
Time-constant (µsec) dynamic range	Air: 2.50, N2: 5.00; Low 1.00, High 7.00	Air: 10.00; N2: 50.00; Low: 3.00, High: 70.00	Air: 0.50, N2: 2.50; Low: 0.30, High: 6.00
Accuracy: (0–20% O2, 0–50ºC)	5% of reading (using polynomial fit to multipoint calibration)	5% of reading (using polynomial fit to multipoint calibration)	5% of reading (using polynomial fit to multipoint calibration)
Response time of probe with no overcoat	~1 second, in liquid and gas	~1 second, in liquid and gas	~1 second, in liquid and gas
Response time of dissolved oxygen in liquid (with overcoat)	30-45 seconds	30-45 seconds	Overcoat not required
Response time of probe with Overcoat of Oxygen Gas (at 1 atmosphere)	15-20 seconds	15-20 seconds	Overcoat not required
Dynamic range of Dissolved Oxygen in liquid	0–40.7 ppm; 0–760 mm Hg partial pressure	0–40.7 ppm; 0–760 mm Hg partial pressure	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	0–100% (mole percent); 0–760 mm Hg partial pressure	0–100% (mole percent); 0–760 mm Hg partial pressure
Stability Dissolved Oxygen in liquid	Drift<0.01 ppm per hour	Drift < 0.00008 ppm O2 per hour at low dissolved oxygen; Drift ~ 0.006 ppm O2 per hour in air-saturated water	Drift<0.002 ppm per hour
Stability Oxygen Gas (at 1 atmosphere)	Drift ~0.03% O2 per hour	Drift ~ 0.0002% O2 drift per hour at low O2; Drift ~ 0.015% O2 per hour air	Drift ~0.01% O2 per hour
Resolution of Dissolved Oxygen in liquid	0.02 ppm at room temperature	0.002 ppm at room temperature	0.02 ppm at room temperature
Resolution of Oxygen Gas (at 1 atmosphere)	0.05% (0.4 mmHg) at room temperature	0.005% at room temperature	0.05% (0.4 mmHg) at room temperature
Lowest detectable limit of Dissolved Oxygen in liquid	0.02 ppm	0.002 ppm at room temperature	0.02 ppm
Lowest detectable limit of oxygen gas (at 1 atmosphere)	0.05% (0.4 mm Hg)	0.005% (0.04 mm Hg)	0.05% (0.4 mm Hg)
Overcoat available	Yes, order FOXY-AF or FOXY-AF-MG	Yes	No overcoat available
Temperature range	-50ºC to +80ºC	0ºC to +60ºC	-50ºC to +80ºC
Temperature	Temperature sensor and software-supported compensation	Temperature sensor and software-supported compensation	Temperature sensor and software-supported compensation
Temperature recalibration	Only when probe is replaced/refurbished	Only when probe is replaced/refurbished	Only when probe is replaced/refurbished
Probe lifetime	Reconditioning recommended once per year	Reconditioning recommended once per year	Reconditioning recommended once per year