A Three-Step Resolution-Reconfigurable Hazardous Multi-Gas Sensor Interface for Wireless Air-Quality Monitoring Applications

Abstract Methanol poisoning causes blindness, organ failure or even death when recognized too late. Currently, there is no methanol detector for quick diagnosis by breath analysis or for screening of laced beverages. Typically, chemical sensors cannot distinguish methanol from the much higher ethanol background. Here, we present an inexpensive and handheld sensor for highly selective methanol detection. It consists of a separation column (Tenax) separating methanol from interferants like ethanol, acetone or hydrogen, as in gas chromatography, and a chemoresistive gas sensor (Pd-doped SnO2 nanoparticles) to quantify the methanol concentration. This way, methanol is measured within 2 min from 1 to 1000 ppm without interference of much higher ethanol levels (up to 62,000 ppm). As a proof-of-concept, we reliably measure methanol concentrations in spiked breath samples and liquor. This could enable the realization of highly selective sensors in emerging applications such as breath analysis or air quality monitoring.

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Metalloxidgassensor-Array für die Qualifizierung der Luftgüte (Metal Oxide Gas Sensor Array for Air Quality Monitoring)

tm - Technisches Messen ◽

10.1524/teme.71.5.305.33121 ◽

2004 ◽

Vol 71 (5-2004) ◽

pp. 305-310 ◽

Cited By ~ 1

Author(s):

Jürgen Wöllenstein ◽

Harald Böttner

Keyword(s):

Air Quality ◽

Metal Oxide ◽

Gas Sensor ◽

Sensor Array ◽

Quality Monitoring ◽

Air Quality Monitoring ◽

Gas Sensor Array ◽

Metal Oxide Gas Sensor

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Air Quality Monitoring Using Internet of Things (IoT) in Smart Cities

Handbook of Research on Implementation and Deployment of IoT Projects in Smart Cities - Advances in Civil and Industrial Engineering ◽

10.4018/978-1-5225-9199-3.ch019 ◽

2019 ◽

pp. 317-333

Author(s):

Gayatri Doctor ◽

Payal Patel

Keyword(s):

Air Pollution ◽

Air Quality ◽

Internet Of Things ◽

Environmental Monitoring ◽

Real Time ◽

Smart Cities ◽

Quality Monitoring ◽

Air Quality Monitoring ◽

Monitoring Applications ◽

Environmental Health Problem

Air pollution is a major environmental health problem affecting everyone. An air quality index (AQI) helps disseminate air quality information (almost in real time) about pollutants like PM10, PM2.5, NO2, SO2, CO, O3, etc. In the 2018 environmental performance index (EPI), India ranks 177 out of 180 countries, which indicates a need for awareness about air pollution and air quality monitoring. Out of the 100 smart cities in the Indian Smart City Mission, which is an urban renewal program, many cities have considered the inclusion of smart environment sensors or smart poles with environment sensors as part of their proposals. Internet of things (IoT) environmental monitoring applications can monitor (in near real time) the quality of the air in crowded areas, parks, or any location in the city, and its data can be made publicly available to citizens. The chapter describes some IoT environmental monitoring applications being implemented in some of the smart cities like Surat, Kakinada.

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