A fluorescent dissolved oxygen sensor with autocalibration based on ruthenium (II) tris-bathophenanthroline complex

Abstract The study describes a submersible fluorescent dissolved oxygen (DO) sensor suitable for aquaculture facilities. The sensor is based on the quenching of fluorescence from ruthenium (II) tris-bathophenanthroline complex, [Ru(dpp)3]2+. One of its precursors, bathophenanthroline (BPhen), was obtained by a green approach with less aggressive reagents than in a classical synthesis. It was embedded in a polymer membrane and attached to a glass window to fabricate a sensing element. The composition and functioning of the sensor are described. It uses an additional red LED for automatic calibration and correction of measurements due to photodegradation of Ru(dpp) over time. The intensity of the red light reflected from the active Ru(II) centres indicates their concentration and allows for automatic correction of the calibration factor. The sensor has demonstrated good linearity in calibration tests; its readings were independent of the presence of common inorganic ions in water, which might interfere with the results. This novel low-cost sensor with autocalibration is expected to be a long-term solution for aquaculture.

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The Research about La0.8Sr0.2CoO3 Application as Dense Diffusion Barrier in Limiting Current Oxygen Sensors

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.703.111 ◽

2013 ◽

Vol 703 ◽

pp. 111-114

Author(s):

Yin Lin Wu ◽

Hai Yan Zhao ◽

Fu Shen Li

Keyword(s):

Diffusion Barrier ◽

Solid Electrolytes ◽

Oxygen Sensor ◽

Low Cost ◽

Limiting Current ◽

Stabilized Zirconia ◽

Long Term Stability ◽

Oxygen Ion ◽

Ion Conducting

The fabrication and operation of a new thick film type of limiting current oxygen sensor is demonstrated that utilizes yttria (8% mol) stabilized zirconia (YSZ) as oxygen ion conducting solid electrolytes and dense La0.8Sr0.2CoO3(LSC) as diffusion barrier. The oxygen sensor shows a near linear response between 0 to 10.5% O2in argon at 1023K. The advantages of the sensor are simple construction, low cost and potential long term stability.

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Development of a Low-Cost Hemin-Based Dissolved Oxygen Sensor With Anti-Biofouling Coating for Water Monitoring

IEEE Sensors Journal ◽

10.1109/jsen.2014.2332513 ◽

2014 ◽

Vol 14 (10) ◽

pp. 3400-3407 ◽

Cited By ~ 21

Author(s):

Leo Hsu ◽

Ponnambalam Ravi Selvaganapathy ◽

John Brash ◽

Qiyin Fang ◽

Chang-Qing Xu ◽

...

Keyword(s):

Dissolved Oxygen ◽

Oxygen Sensor ◽

Low Cost ◽

Water Monitoring

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Limiting Current Oxygen Sensors with LSM as Dense Diffusion Barrier

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.263 ◽

2008 ◽

Vol 368-372 ◽

pp. 263-264

Author(s):

Yin Lin Wu ◽

Ling Wang ◽

Fu Shen Li ◽

Yan Qin Zhao

Keyword(s):

Diffusion Barrier ◽

Solid Electrolytes ◽

Oxygen Sensor ◽

Low Cost ◽

Limiting Current ◽

Excellent Performance ◽

Long Term Stability ◽

Oxygen Ion ◽

Ion Conducting

A thick film type of limiting current oxygen sensor which uses yttria (8% mol) stabilized zirconia (YSZ) as oxygen ion conducting solid electrolytes and dense La0.8Sr0.2MnO3 (LSM) as diffusion barrier was developed successfully. The oxygen sensor showed excellent performance at oxygen concentrations ranging from 0 to 10 ppm. The advantages of the sensor are simple construction, low cost and potential long term stability.

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An Inexpensive, Low-Maintenance, Precision Amplifier, Dissolved Oxygen Sensor, and Miniature Data Logger System Designed for Long-Term Deployment in Riverine Systems

Transactions of the American Fisheries Society ◽

10.1577/t08-011.1 ◽

2010 ◽

Vol 139 (2) ◽

pp. 593-597 ◽

Cited By ~ 1

Author(s):

Lawrence W. Keenan ◽

Steven J. Miller

Keyword(s):

Dissolved Oxygen ◽

Oxygen Sensor ◽

Data Logger ◽

Riverine Systems

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A Low-Cost Rotary Optical Potentiometer Mechanism Based on Optoelectronics Technique

Volume 3: Industrial Applications; Modeling for Oil and Gas, Control and Validation, Estimation, and Control of Automotive Systems; Multi-Agent and Networked Systems; Control System Design; Physical Human-Robot Interaction; Rehabilitation Robotics; Sensing and Actuation for Control; Biomedical Systems; Time Delay Systems and Stability; Unmanned Ground and Surface Robotics; Vehicle Motion Controls; Vibration Analysis and Isolation; Vibration and Control for Energy Harvesting; Wind Energy ◽

10.1115/dscc2014-5947 ◽

2014 ◽

Author(s):

Young-shin Kwon ◽

Won-jong Kim

Keyword(s):

High Precision ◽

Position Control ◽

Low Cost ◽

Red Light ◽

Optical Power ◽

Laser Printer ◽

Propagation Mechanism ◽

Test Bed ◽

Rectangular Window ◽

Red Led

A novel low-cost high-precision absolute rotary angle-sensing mechanism using optoelectronic components is proposed. Its working principle is based on the change of the optical power reflected off the monotone-colored pattern track from a red light emitting diode (LED) to a red-green-blue (RGB) sensor. The main advantages of this low-cost sensor are its simplicity, high resolution, and non-contacting structure. The propagation mechanism for the output voltage of the RGB sensor from a red LED source is formulated analytically. The stationary rectangular-window mask between the cylindrical black-colored V-shape track and the RGB sensor is also employed to linearize the received optical power with circular beam pattern. The effect from the black-and-white laser-printer resolution is studied with various reference angles using a high-precision potentiometer. The performance of the proposed optical rotary potentiometer mechanism is demonstrated using a rotary position-control test bed. The bandwidth (BW) of 4.42 kHz, resolution of 0.167°, and nonlinearity of 2.8% are achieved.

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PtOEP–PDMS-Based Optical Oxygen Sensor

Sensors ◽

10.3390/s21165645 ◽

2021 ◽

Vol 21 (16) ◽

pp. 5645

Author(s):

Camila M. Penso ◽

João L. Rocha ◽

Marcos S. Martins ◽

Paulo J. Sousa ◽

Vânia C. Pinto ◽

...

Keyword(s):

Oxygen Sensor ◽

Low Cost ◽

Chemical Properties ◽

Cost Effective ◽

Luminescent Properties ◽

Low Oxygen ◽

Pdms Film ◽

Sensing Applications ◽

Optical Oxygen Sensor

The advanced and widespread use of microfluidic devices, which are usually fabricated in polydimethylsiloxane (PDMS), requires the integration of many sensors, always compatible with microfluidic fabrication processes. Moreover, current limitations of the existing optical and electrochemical oxygen sensors regarding long-term stability due to sensor degradation, biofouling, fabrication processes and cost have led to the development of new approaches. Thus, this manuscript reports the development, fabrication and characterization of a low-cost and highly sensitive dissolved oxygen optical sensor based on a membrane of PDMS doped with platinum octaethylporphyrin (PtOEP) film, fabricated using standard microfluidic materials and processes. The excellent mechanical and chemical properties (high permeability to oxygen, anti-biofouling characteristics) of PDMS result in membranes with superior sensitivity compared with other matrix materials. The wide use of PtOEP in sensing applications, due to its advantage of being easily synthesized using microtechnologies, its strong phosphorescence at room temperature with a quantum yield close to 50%, its excellent Strokes Shift as well as its relatively long lifetime (75 µs), provide the suitable conditions for the development of a miniaturized luminescence optical oxygen sensor allowing long-term applications. The influence of the PDMS film thickness (0.1–2.5 mm) and the PtOEP concentration (363, 545, 727 ppm) in luminescent properties are presented. This enables to achieve low detection levels in a gas media range from 0.5% up to 20%, and in liquid media from 0.5 mg/L up to 3.3 mg/L at 1 atm, 25 °C. As a result, we propose a simple and cost-effective system based on a LED membrane photodiode system to detect low oxygen concentrations for in situ applications.

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Limiting Current Oxygen Sensors with LSF as Dense Diffusion Barrier

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.417 ◽

2007 ◽

Vol 336-338 ◽

pp. 417-419 ◽

Cited By ~ 1

Author(s):

Ling Wang ◽

Fu Shen Li ◽

Hui Zhu Zhou ◽

Hui Xia ◽

Mei Yang ◽

...

Keyword(s):

Diffusion Barrier ◽

Solid Electrolytes ◽

Oxygen Sensor ◽

Low Cost ◽

Limiting Current ◽

Long Term Stability ◽

Oxygen Ion ◽

New Type ◽

Ion Conducting

A new type of limiting current oxygen sensor which uses yttria (8%mol) stabilized zirconia (YSZ) as oxygen ion conducting solid electrolytes and dense La0.8Sr0.2FeO3 (LSF) as diffusion barrier was developed successfully. The oxygen sensor shows excellent performance at oxygen concentrations range of from 0 to 21%. The advantages of the sensor are simple construction, low cost and potential long term stability.

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