Results 211 to 220 of about 88,532 (259)
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Electrochemical sensors for hydrogen and hydrogen sulfide determination
Sensors and Actuators B: Chemical, 1994Abstract New electrochemical sensors developed for the quantitative analysis of near-ppm levels of hydrogen and hydrogen sulfide are reported. They combine existing electrochemistry and new regeneratable electrode materials incorporated in a simple design.
A.V. Kroll +2 more
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A chemiluminescence sensor for the determination of hydrogen peroxide
Talanta, 2007A chemiluminescence one-shot sensor for hydrogen peroxide is described. It is prepared by immobilization of cobalt chloride and sodium lauryl sulphate in hydroxyethyl cellulose matrix cast on a microscope cover glass. Luminol, sodium phosphate and the sample are mixed before use and applied on the membrane by a micropipette.
Azra, Tahirović +3 more
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Performance of a hydrogen sensor in Pb–16Li
Journal of Nuclear Materials, 2007Abstract To develop a sensor for measurements of hydrogen (and its isotopes) concentration in liquid Pb–16Li, two permeating capsules made with niobium and pure iron have been tested. The experimental results demonstrated that the Nb-sensor is not suitable for the foreseen application.
CIAMPICHETTI, ANDREA +5 more
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Wireless passive hydrogen gas sensor
2012 25th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), 2012This paper presents an implementation of a passive wireless hydrogen gas sensor tag operating in ISM band at 900 MHz. The antenna has been designed and fabricated to operate with a MOS hydrogen gas sensor. The preliminary results show a promising integration of MOS hydrogen sensor in wireless systems for future sensors network applications and hydrogen
Otmane Bekkaoui +3 more
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Hydrogen-selective thermoelectric gas sensor
Sensors and Actuators B: Chemical, 2003Abstract A thermoelectric (TE) hydrogen gas sensor was fabricated by depositing a platinum catalyst thin film on the half surface of nickel oxide thick film. When it was exposed to combustible gas diluted by synthetic air, the catalyst layer converts hydrogen and oxygen effectively to water vapor, and give out heat energy, resulting temperature ...
Shin, Woosuck +3 more
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Optical sensor for hydrogen peroxide
Mikrochimica Acta, 1989Three types of sensors for continuous determination of hydrogen peroxide (HP) are described. The working principles are based on the decomposition of HP by a catalyst and on the measurement of the amount of oxygen thereby produced. The change in oxygen tension is quantitatively determined via the quenching of the fluorescence of a silica gel-adsorbed ...
Hermann E. Posch, Otto S. Wolfbeis
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Yttrium Nanoparticle Hydrogen Gas Sensors
2011The preparation of new types of nanosystems based on metallic yttrium nanoparticles, which are difficult to produce by traditional methods due to the high melting temperature and the extremely high oxidizability of this metal, has been studied. The materials were prepared with an original high vacuum set-up (LUCAS) intended for the formation of metal ...
Stepanov A., Reinhodt A., Kreibig U.
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Stabilization of MISFET hydrogen sensors
Sensors and Actuators, 1986Abstract Pd-gate MIS hydrogen sensors have serious drift problems and decreased sensitivity after long term operation. We have shown that the serious drift can be eliminated with Pd/Pt hydrogen sensing gate and Ag/Cu/Pd/Pt reference gate differential-type sensors. The decrease of sensitivity can be miniized by high temperature annealing in air.
S.-Y. Choi +3 more
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International Journal of Hydrogen Energy, 2012
A new silicon-based hydrogen sensor for measurements at high concentrations near the lower flammable limit of hydrogen (40,000 ppm) is presented. Due to operation at room temperature the power consumption of the sensor is smaller than that of other sensors on the market by several orders magnitude. Further development of the sensor system could lead to
S. Linke +3 more
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A new silicon-based hydrogen sensor for measurements at high concentrations near the lower flammable limit of hydrogen (40,000 ppm) is presented. Due to operation at room temperature the power consumption of the sensor is smaller than that of other sensors on the market by several orders magnitude. Further development of the sensor system could lead to
S. Linke +3 more
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Application of ultrasonic to a hydrogen sensor
2010 IEEE Sensors, 2010A fast responce hydrogen sensor using ultrasonic was developed and demonstrated. It uses the difference in sound velocity between hydrogen and the air. Thus, it is possible to measure hydrogen concentration by measuring the sound velocity changing when hydrogen is mixed in the air.
Masashi Sonoyama +2 more
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