Non-contact thermal characterization using IR camera for compact metal-oxide gas sensor

This chapter provides a review of recent progress in gas sensor based on semiconducting metal oxide nanostructure. The response mechanism and development of various methods to enhancement of sensing properties receives the most attention. Theoretical models to explain the effects of morphology, additives, heterostructured composite and UV irradiation on response improvement were studied comprehensively. Investigations have indicated that 1D nanostructured metal oxide with unique geometry and physical properties display superior sensitivity to gas species. Also, the proposed conduction model in gas sensor based on 1D Metal oxide is discussed. Finally, the response mechanism of hierarchical and hollow nanostructures as novel sensing materials is addressed.

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Statistical shape analysis pre-processing of temperature modulated metal oxide gas sensor response for machine learning improved selectivity of gases detection in real atmospheric conditions

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2020.129187 ◽

2020 ◽

pp. 129187 ◽

Cited By ~ 1

Author(s):

Valeriy V. Krivetskiy ◽

Matvei D. Andreev ◽

Aleksandr O. Efitorov ◽

Alexander M. Gaskov

Keyword(s):

Machine Learning ◽

Metal Oxide ◽

Gas Sensor ◽

Shape Analysis ◽

Sensor Response ◽

Statistical Shape Analysis ◽

Atmospheric Conditions ◽

Statistical Shape ◽

Metal Oxide Gas Sensor

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In-Situ Analysis of Volatile Organic Compounds in Biogas Fermentation Processes Using a Metal Oxide Gas Sensor Array

ECS Meeting Abstracts ◽

10.1149/ma2020-01282153mtgabs ◽

2020 ◽

Vol MA2020-01 (28) ◽

pp. 2153-2153

Author(s):

Binayak Ojha ◽

Divyashree Narayana ◽

Margarita Aleksandrova ◽

Heinz Kohler ◽

Matthias Schwotzer ◽

...

Keyword(s):

Volatile Organic Compounds ◽

Metal Oxide ◽

Gas Sensor ◽

Organic Compounds ◽

Sensor Array ◽

Fermentation Processes ◽

Gas Sensor Array ◽

Volatile Organic ◽

Metal Oxide Gas Sensor

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FIXED POINT RH EQUILIBRIUM OF GAS SENSOR TEST CHAMBER USING SIMPLE AIR BUBBLER METHOD

Jurnal Teknologi ◽

10.11113/jt.v76.5785 ◽

2015 ◽

Vol 76 (10) ◽

Author(s):

Amirul Abd Rashid ◽

Nor Hayati Saad ◽

Daniel Bien Chia Sheng ◽

Lee Wai Yee ◽

Ahmed Jaffar

Keyword(s):

Fixed Point ◽

Water Vapor ◽

Metal Oxide ◽

Gas Sensor ◽

Test Chamber ◽

Important Variable ◽

Oxygen Molecule ◽

Distilled Water ◽

Nitrogen Gas ◽

Metal Oxide Gas Sensor

Relative Humidity (RH) is considered as one of the important variable to be controlled during testing and characterizing of metal oxide gas sensor. This is because the metal oxide can easily react with the hydrogen and oxygen molecule of the water vapor which associated with RH level. In this paper, the effect of using nitrogen as carrier to feed the analyte to the sensor inside a 40 liter capacity container has been studied. When Nitrogen gas was supplied to the chamber, the RH value dropped significantly from initial ~67 % RH to ~7 % RH within one hour duration. As an alternative, a simple bubbler system was introduced to minimize the drop of RH. The bubbler which was filled with 100% distilled water or mixed with a certain percentage of glycerol are able to maintain the RH to a certain level for a certain period of time.

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