Development of optimal electroplated platinum-black catalyst for quartz hydrogen sensors

Oigawa, Hiroshi; Harima, Kazuyuki; Kohsaka, Fusao; Tsuno, T.; Ueda, T.

doi:10.1109/icsens.2016.7808934

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Since the gases need a minimum temperature to burn, the platinum coil is heated up to a certain temperature by passing an electrical current. Moreover, the coil is covered with special catalysts to provide the oxidation condition for the gases [57]. Normally, a reference coil is also employed to increase the sensor accuracy.…”

Section: Catalytic Sensorsmentioning

confidence: 99%

Survey of different sensors employed for the power transformer monitoring

Samimi

Ilkhechi

2020

IET Science, Measurement & Technology

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Section: Catalytic Sensorsmentioning

confidence: 99%

Survey of different sensors employed for the power transformer monitoring

Samimi

Ilkhechi

2020

IET Science, Measurement & Technology

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“…On the previously developed sensor, the heater was made from Pt thin film, because Pt is thermally and chemically stable for long periods. (8) However, the Pt heater had caused fluctuations in the heating temperature during catalytic reactions. To improve the stability of the heating temperature, we proposed the application of a Au thin film to the heater of the sensor; the possibility of replacing Pt with a Au thin film has been reported.…”

Section: Introductionmentioning

confidence: 99%

“…(6)(7)(8) The sensor uses resonance frequency temperature characteristics to detect the heat of reaction of hydrogen on the Pt catalyst. To improve the resolution of hydrogen concentration, a special cut quartz wafer, which achieved a large temperature coefficient of frequency (TCF), was used for the sensor.…”

Section: Introductionmentioning

confidence: 99%

Stable Heating Technology for Catalytic Combustion Hydrogen Gas Sensor Using Quartz Resonators

2018

Sensors and Materials

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In this paper, we focus on heating technologies for gas sensors. To discuss the requirements of heating accuracy of the sensor quantitatively, the effect of temperature error on the sensitivity of the sensor was evaluated. A Au thin film was used as a catalytically inactive heater for the sensor. The design and fabrication of this novel sensor with a Au thin-film heater is discussed. To stabilize the properties of the heater, the effect of annealing on the resistivity and temperature coefficient of resistance of the heater at 120 ℃ was verified by experiment. Additionally, a heater control circuit using op-amps was designed. Using the controller, accurate heating with a temperature error within 0.16 ℃ was obtained. As a result, constant sensitivity in a hydrogen gas concentration range of 0-2 vol.% was provided, and the ability to detect a concentration of 0.01 vol.% was demonstrated.

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