DOpO2 oxygen sensor

New!

DOpO2 optical oxygen sensor combines lower cost, better performance and ease of use in a unique format. The DOpO2 can be used with a screw on sensor cap or and optical fiber sensor.

 

DOpO2 USB optical O2 sensor - SpectrecologySensor caps and fiber probes are available with AP “Zero-Drift” chemistry for aqueous media, and gases. For hydrocarbon environments we offer the HCR chemistry.

 

Buy a DOpO2 oxygen sensor online!

 

Both provide measurements of partial pressure of O2 in contact with the sensor material.  The sensing mechanism is fluorescence quenching by molecular oxygen,

DOpO2 is our newest totally integrated optical oxygen sensor. DOpO2 uses our high stability Zero-Drift fluorophores to measure pO2 through dynamic quenching of fluorescence. The DOpO2 sensor is waterproof, includes all electronics, signal processing, calibration coefficients and settings required to calculate and report fluorescence decay (Tau), pO2, O2 concentration and temperature in real time.

The standard DOpO2 uses a USB interface to communicate with full featured Windows based DOpO2 Viewer software.  Versions for analog output or RS485 are also available.

 

DOpO2 viewer software wave display of fluorescence phase delay

 

DOpO2 Viewer software time series display - Spectrecology

 

The DOpO2 unit is flexible!

You can use it with the supplied sensor cap. The cap screws onto the optical port and holds the sensor substrate disc securely in the optical path.  Caps can be changed to use different sensor chemistries (for example for hydrocarbons), or to replace damaged sensors.

Or, you can attach an optical fiber sensor to the optical port. Fiber sensors come in a variety of lengths and styles.

DOpO2 with optical fiber sensor - Spectrecology

DOpO2 is low cost!

DOpO2 electronics provide more stable signals and at half the cost of our modular versions.

 

DPT-AP-125 Fiber Optic Sensor for DOpO2

DOpO2 Zero drift O2 sensor, dip probe with embedded thermistor. 0.125″ OD, 7″ long, SS, 55 bar pressure rating. 5′ Thermistor lead, factory calibrated. Reflective overcoat. Attaches to the DOpO2 electronics

 

By a DPT-125-AP fiber probe for DOpO2 online!

 

 

NEOFOX

NEOFOX-GT miniature fiber optic O2 sensor detection electronics works with fluorescence decay based O2 sensors to provide reliable temperature corrected O2 readings in gases, liquids and slurries. Neofox couples to your PC through a USB cable, or it can operate stand alone by using the analog or digital outputs. NEOFOX-SPORT is a portable version, complete with battery, SD card slot, and display with control buttons.

Neofox-gt Zero drift optical O2 sensor system
Neofox-GT phase fluorometer for Zero Drift oxygen sensors — Spectrecology

 Neofox-GT

  • Small Footprint
  • Simple USB interface
  • Analog output
  • RS-232 support

Ideal for measurements in:

  • Industrial Processes
  • Medical and Pharmaceutical
  • Biological / Cell Culture / Fermentation
  • Packaging

 

 

Buy a NEOFOX-GT online!

 

The back story…   Our oxygen sensing adventure started 20 years ago when we stumbled on a fiber optic O2 sensor based on fluorescence quenching being developed by a materials scientist, Dr. Mahmoud Shahriari. We coupled his sensor to our S1000 miniature spectrometer and… it worked! Measuring the intensity of the fluorescence had its problems, so we switched to an expensive phase fluorometer approach. The Neofox was developed to decrease the size, lower the cost, and to fit into our JAZ line of portable modular detectors. Now, with the perfection of our ZERO-DRIFT sensor chemistries, we feel we have the most accurate, stable and affordable system offered anywhere.

 

Neofox-sport Zero-Drift O2 pO2 DO sensors
Neofox-sport portable oxygen meter for ZERO-DRIFT optical O2 sensors — Spectrecology

Neofox-Sport  portable

  • Small Footprint, easy to carry
  • On-board battery pack can sustain over 3 hours’ worth of continuous measurement
  • On-board display allows the user to calibrate, save data, and change options such as units, duty cycle, and acquisition parameters
  • SD card used to store and transfer data
  • Can also be used tethered to a PC as a standard NeoFox-GT
Ideal for measurements in:
  • Marine/river/lake water research
  • Sediment and soil analysis
  • Portable spot-check system for large industrial facility
  • Aerospace
  • Defense

System Specifications

Dimensions 107.95 x 63.5 x 38.1 mm
Weight 642 g
Principle Photoluminescence quenching using a ruthenium compound: sensor measures O2 partial pressure
Parameters measured Luminescence phase shift, AC luminescence intensity temperature (via optional external thermistor) and pressure (via onboard pressure transducer)
Sensor coating formulations General purpose (FOXY), high-sensitivity (FOSPOR) and hydrocarbon-ready (HIOXY)
Media Gases and liquids
Communications USB, analog out
External Power Supply Voltage 4.5 – 5.5 V (5.0 V typical)
Power Consumption 2.5 W (5 V External Power, Charging, Typical)
Data Logging Rate, Maximum 10 Hz
4-20 mA Output Accuracy at 25 ºC ± 160 µA
0-5 V Output Accuracy at 25 ºC ± 50 mV
Electronics Operating Temperature 0 – 55 ºC
Dimensions 327.6 x 190.5 x 66.5 mm
Weight 928 g
Principle Photoluminescence quenching using a ruthenium compound: sensor measures O2 partial pressure
Parameters measured Luminescence phase shift, AC luminescence intensity temperature (via optional external thermistor) and pressure (via onboard pressure transducer)
Sensor coating formulations General purpose (FOXY), high-sensitivity (FOSPOR) and hydrocarbon-ready (HIOXY)
Media Gases and liquids
Communications USB, analog out
External Power Supply Voltage 4.75 – 5.1 V (5.0 V typical)
Total Power Consumption 6 W (5 V External Power, Charging, Typical)
Total Power Consumption 3.1 W (5 V External Power, Not Charging, Typical)
Total Power Consumption 3.3 W (3.3 V Battery Power, Typical)
NeoFox Modular Power Consumption 2.5 W (3.3V Battery Power, Typical)
Battery Life 3 hours (typical)
Data Logging Rate, Maximum 1 Hz
4-20 mA Output Accuracy at 25 ºC + 160 µA
0-5 V Output Accuracy at 25 ºC + 50 mV
Electronics Operating Temperature 0 – 55 ºC
AP formulationPolystyrene matrix HCR formulationSol Gel matrix MR formulationSol Gel matrix
Response Rate T90 = 3 sec T90 = 1 sec T90 = 1 sec
Dynamic Range (gas) 0 – 760 mmHg0 – 100% (at 1 atm) 0 – 760 mmHg0 – 100% (at 1 atm) 0 – 760 mmHg0 – 100% (at 1 atm)
Dynamic range (DO) 0 – 40 ppm in H2O 0 – 40 ppm in H2O 0 – 40 ppm in H2O
Resolution (gas) 0.04 mmHg0.005% (at 1 atm) 0.4 mmHg0.05% (at 1 atm) 0.4 mmHg0.05% (at 1 atm)
Resolution (DO) 0.002 ppm in H2O 0.002 ppm in H2O 0.002 ppm in H2O
Accuracy 5% of reading 5% of reading 5% of reading
LDL (gas) 0.04 mmHg0.005% (at 1 atm) 0.4 mmHg0.05% (at 1 atm) 0.4 mmHg0.05% (at 1 atm)
LDL (DO) 0.002 ppm in H2O 0.002 ppm in H2O 0.002 ppm in H2O
Drift rate No measureable long term drift, continuous operation 0.0001 % /hr in gas 0.0001 % /hr in gas
Sensor Operating Temperature -50 to 100C -50 to 200C -50 to 200C
Useful Lifetime 3 years 3 years 3 years
Compatibility General purpose gases and aqueous solutions Organic solvents General purpose gases and aqueous liquids
Water Vapor Interference no yes no
Formats Dip coated fibersSpin coated patches & probes Dip coated fibersSpin coated patches & probes Dip coated fibersSpin coated patches & probes
Review Best general purpose probe, longer fluorescence decay yields more resolution, zero drift means stable calibrations Used for organic solvents and gases with organic vapors.  This sensor does respond to water vapor as well as O2 General purpose but with faster response rate than AP chemistry. Does exhibit long term photo-bleaching drift and has less resolution.

 

Neofoxviewer, zero drift O2 sensors, HCR, FOXY
Neofoxviewer software is used to read values from ZeroDrift O2 sensors — Spectrecology

Neofox Viewer Software

  • Graphical interface entirely customizable to show over 20 sensor system parameters
  • Main display shows oxygen content in several standard gaseous and dissolved units
  • Data logging with customizable parameters
  • Easy to use troubleshooting resources tell you the quality of your oxygen sensor
  • Advanced View gives in-depth control of hardware and software parameters
  • Compatible with 32- and 64-bit Windows
Neofoxviewer Calibration worksheet -- collect and process Tau values at known pO2 and temperature levels -- Spectrecology
Neofoxviewer Calibration worksheet — collect and process Tau values at known pO2 and temperature levels — Spectrecology

 

Neofoxview optical O2 sensors
Calibrating ZERO-DRIFT O2 sensors with Neofoxviewer. Calibration coefficients are downloaded to the Neofox which can then run un-tethered to a PC — Spectrecology

  Applications

Optical O2 sensors can be used in any sample, gas or fluid, that is compatible with the sensor chemistry. AP chemistry is general purpose for gases and water based liquids. HCR is designed to work in hydrocarbons.  Temperature affects the reading, so you need to measure and correct, or control the temperature.

 

MAP modified air packaging O2 sensor
Modified Air Packaging — checking O2 level in foods, pharmaceuticals, and medical products with ZERO DRIFT O2 sensors — Spectrecology
dissolved oxygen DO
ZERO DRIFT DO sensors work well in bio-reactors and fermentors — Spectrecology
SEOX blood vial image-medical-diagnostics-1-480x321
Zero Drift O2 sensor measure dissolved O2 in blood and other body fluids — Spectrecology

 

DO meter
Dissolved oxygen (DO) measurements without the problems of electrodes! Zero drift O2 sensors — Spectrecology