The Measurement Setup for Gas Detection by Resistance Fluctuations of Gas Sensors

2006 ◽  
Author(s):  
Janusz Smulko
Keyword(s):  
Gas Sensors ◽  
Gas Detection ◽  
Resistance Fluctuations

HIGHER-ORDER SPECTRA IN NANOPARTICLE GAS SENSORS

2004 ◽  
Vol 04 (04) ◽  
pp. L597-L603 ◽  
Author(s):  
J. M. SMULKO ◽  
J. EDERTH ◽  
L. B. KISH ◽  
P. HESZLER ◽  
C. G. GRANQVIST
Keyword(s):  
Gas Sensors ◽  
Higher Order ◽  
Gas Detection ◽  
Enhanced Sensitivity ◽  
Sensitivity And Selectivity ◽  
Contour Plots ◽  
Non Gaussian ◽  
Higher Order Spectra ◽  
Resistance Fluctuations

It has previously been shown that resistance fluctuations in resistive sensors provide enhanced sensitivity and selectivity for gas detection. We report measurements and analysis of non-Gaussian components in nanoparticle Pd z ( WO 3)1- z film gas sensors, with z being 0.01 or 0.12, in different ambients. These components can be characterized by higher-order spectra. Contour plots are given of bispectra, and plots of integrated bispectra and trispectra. The phase of the integrated higher-order spectra is analyzed as well.

HAZARDOUS GASES DETECTION BY FLUCTUATION-ENHANCED GAS SENSING

2010 ◽  
Vol 09 (04) ◽  
pp. 359-371 ◽  
Author(s):  
MATEUSZ M. KOTARSKI ◽  
JANUSZ M. SMULKO
Keyword(s):  
Hydrogen Sulfide ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Gas Detection ◽  
Practical Application ◽  
Sensing System ◽  
System A ◽  
Noise Measurements ◽  
Hazardous Gases ◽  
Resistance Fluctuations

Gas sensing can be enhanced by observing resistance fluctuations in Taguchi Gas Sensors. Unfortunately, fluctuation measurements need advanced measurement setups. This paper presents a possibility of fluctuation-enhanced gas sensing that can be utilized in a simplified and cheap gas sensing system. A detailed study has been conducted for two hazardous gases: ammonia ( NH3 ) and hydrogen sulfide ( H2S ) using TGS 826 and TGS 825 resistance sensors. The research was focused on practical application of gas detection by resistance fluctuations for the selected harmful gases. Repeatability of noise measurements was investigated to establish rules for most reliable gas detection by a single gas sensor.

scholarly journals High-Tech and Nature-Made Nanocomposites and Their Applications in the Field of Sensors and Biosensors for Gas Detection

Biosensors ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 176
Author(s):  
Daniele Zappi ◽  
Matiss Martins Ramma ◽  
Viviana Scognamiglio ◽  
Amina Antonacci ◽  
Gabriele Varani ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Scientific Community ◽  
Recent Progress ◽  
Gas Detection ◽  
High Tech ◽  
Complex Structures ◽  
Future Perspectives ◽  
Sensing Element ◽  
Metal Polymer ◽  
Nanoscale Level

Gas sensors have been object of increasing attention by the scientific community in recent years. For the development of the sensing element, two major trends seem to have appeared. On one hand, the possibility of creating complex structures at the nanoscale level has given rise to ever more sensitive sensors based on metal oxides and metal–polymer combinations. On the other hand, gas biosensors have started to be developed, thanks to their intrinsic ability to be selective for the target analyte. In this review, we analyze the recent progress in both areas and underline their strength, current problems, and future perspectives.

scholarly journals Pd-loaded SnO2 hierarchical nanospheres for a high dynamic range H2S micro sensor

RSC Advances ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 5987-5994 ◽  
Author(s):  
Yue Su ◽  
Peng Chen ◽  
Pengjian Wang ◽  
Jing Ge ◽  
Shi Hu ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
Gas Detection ◽  
Micro Sensor ◽  
High Dynamic

The sensitivity of Pd-loaded SnO2 nanosphere sensor to H2S gas: micro gas sensors based on Pd-loaded SnO2 nanospheres have credible gas detection abilities down to 10 ppb and 4 orders of magnitude concentration detection ranges.

scholarly journals Application of quantum cascade lasers to trace gas detection

2015 ◽  
Vol 63 (2) ◽  
pp. 515-525 ◽  
Author(s):  
Z. Bielecki ◽  
T. Stacewicz ◽  
J. Wojtas ◽  
J. Mikołajczyk
Keyword(s):  
Gas Sensors ◽  
Review Paper ◽  
Quantum Cascade Lasers ◽  
Carbonyl Sulfide ◽  
Gas Detection ◽  
Trace Gas ◽  
Quantum Cascade ◽  
Compact Size ◽  
New Applications ◽  
Cascade Lasers

Abstract The potential of Quantum Cascade Laser technology has been recently harnessed in industry, medicine and military to create a range of original infrared gas sensors. These sensors have opened up many new applications due to compact size, excellent sensitivity, robust construction and low power requirements. They rely on infrared absorption spectroscopy to determine identity and quantity of gases. The measurement of these gases has relied on different technologies including multi-pass spectroscopy, photoacoustic spectroscopy, cavity ring down spectroscopy, and their various modifications. In this review paper some technologies are described in terms of its advantages/disadvantages in many application. The results of own works about methane, ammonia, nitric oxide, nitrous oxide, and carbonyl sulfide detection are presented as well

Design and Research on the Gas Monitoring System Based on LabVIEW

2013 ◽  
Vol 427-429 ◽  
pp. 1254-1257
Author(s):  
Kuan Gang Fan ◽  
Xin Zhang ◽  
Qing Mei Cao ◽  
Ying Fei Sheng ◽  
Le Ping Zheng
Keyword(s):  
Monitoring System ◽  
Gas Sensors ◽  
Remote Monitoring ◽  
Gas Detection ◽  
Alarm System ◽  
Gas Monitoring ◽  
Gas Concentration ◽  
The Core ◽  
Housing Environment ◽  
Semiconductor Gas Sensors

Gas detection alarm system plays a more and more important role in People's Daily life and every field. This paper proposes semiconductor gas sensors and SCM as the core, which could achieves the gas concentration monitoring and alarm functions. The gas monitoring system includes host computer that consists of LabVIEW operating interface and slave computer that constructed with AT89C51 microcomputer and MQ-2 gas sensor.It achieves remote monitoring and controlling housing environment in real-time and has a certain practical value in society.

scholarly journals INVESTIGATION OF SENSITIVITY AND SELECTIVITY OF MWCNT–BASED SENSOR FOR AMMONIAC GAS DETECTION AT ROOM TEMPERATURE

2012 ◽  
Vol 15 (2) ◽  
pp. 62-69
Author(s):  
Lich Quang Nguyen ◽  
Tu Cong Nguyen ◽  
Anh Tuan Ly ◽  
Thanh Phuc Tran ◽  
Pho Quoc Phan ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Vapor Deposition ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Gas Detection ◽  
Cvd Method ◽  
Sensor Device ◽  
Pt Electrodes ◽  
Multi Walled Carbon Nanotube ◽  
Sensitivity And Selectivity

Gas sensors based on multi-walled carbon nanotube (MWCNT) for detecting gaseous molecules of ammoniac (NH3) were developed and investigated. MWCNT film was grown directly by chemical vapor deposition (CVD) method on Pt electrodes to fabricate sensor device. The CNT based – gas sensor is shown sensitively and selectively to NH3 gas at room temperature.

Printed Cantilevers and MOS Gas Sensors for Hazardous Gas Detection at Room Temperature

2016 ◽  
pp. 137-145
Author(s):  
Hélène Debéda ◽  
Van Son Nguyen ◽  
Fernando Almazán ◽  
Maria Pina Pilar ◽  
Véronique Jubéra ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
Gas Detection ◽  
Hazardous Gas
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