Gas Sensor

In my research about gas sensor, there has many kind of gas sensor in the market that can be applied in my project.

• Carbon monoxide sensor CO-AF (Portable) 

Specifications of Electronic gas sensor CO-AF:
1) Measurement range: 0-5000ppm
2) Overgas range: 10000ppm
3) Sensitivity: 55-90 nA per ppm
4) Resolution: 0.5 ppm equivalent
5) Operating range: 24 months
6) Load resistor: 10 to 47 Ω

Features of Electronic gas sensor CO-AF:
1) Leak free guarantee
2) 2 year warranty
3) Drop-in replacement for equivalent sensor
4) Sensor traceability via barcode tracking system
5) Colour coded plastic housing

Applications of Electronic gas sensor CO-AF:
Portable CO detectors 

• Combustible gases sensor TGS2610 

Description of gas sensor TGS2610: 
TGS2610-D00 uses filter material in its housing which eliminates the influence of interference gases such as alcohol, resulting in highly selective response to LP gas. This feature makes the sensor ideal for residential gas leakage detectors which require durability and resistance against interference gas. 

Specifications: 
1) Target gases : Butane, LP gas 
2) range：500 ~ 10,000 ppm 
3) sensitivity (change ratio of Rs) : 0.56 ± 0.06 
4) Circuit Voltage：5.0±0.2V DC/AC 
5) Heater Voltage：5.0±0.2V DC/AC 

Features of gas sensor TGS2610: 
1) High sensitivity to combustible gases 
2) Low power consumption 
3) High sensitivity to methane, propane and butane 
4) Long life and low cost 
5) Uses simple electrical circuit 
6) Small size 

Application of gas sensor TGS2610: 
Domestic gas leak detectors and alarms 
Portable gas detectors 

Combustible gas and vapor detection

• LED NDIR carbon dioxide CO2 Sensor C20

Dscription of carbon dioxide sensor C20: 

    An innovative High Speed, Real Time, Low Cost, Precision gas sensor using Al-In-Sb (Aluminium Indium Antimonde) NDIR LED technology. The base Mid IR solid state technology, developed by QinetiQ and licensed on a sole basis has been incorporated into an advanced CO2 sensor that is suitable for high volume manufacture and is targeted at a number of Carbon Dioxide Sensor applications. 
This Carbon Dioxide sensor is a fast, low power NDIR sensor. 

BENEFITS of carbon dioxide sensor C20: 
1) four readings per second, high accuracy 
2) easy to use: digital output, temperature compensated and linearised 
3) low power: 100mW 
4) solid state: no moving parts, no filaments 
5) wide temperature range: -25℃ to + 55℃ 
6) useful range: 0-10%(higher available) 
7) good immunity to other gases & humidity 
8) various voltages available from 3.3v to 9v 
9) 20mm package 

APPLICATIONS of carbon dioxide sensor C20: 
Modified atmospheres 
Indoor air quality 
Stowaway detection 
Cellar & gas stores 
Combustion control 
Shipping containers 
Atmospheric research 
Greenhouses 

• LED NDIR carbon dioxide CO2 Sensor C20 

Dscription of carbon dioxide sensor C20: 
    An innovative High Speed, Real Time, Low Cost, Precision gas sensor using Al-In-Sb (Aluminium Indium Antimonde) NDIR LED technology. The base Mid IR solid state technology, developed by QinetiQ and licensed on a sole basis has been incorporated into an advanced CO2 sensor that is suitable for high volume manufacture and is targeted at a number of Carbon Dioxide Sensor applications. 
This Carbon Dioxide sensor is a fast, low power NDIR sensor. 

BENEFITS of carbon dioxide sensor C20: 
1) four readings per second, high accuracy 
2) easy to use: digital output, temperature compensated and linearised 
3) low power: 100mW 
4) solid state: no moving parts, no filaments 
5) wide temperature range: -25℃ to + 55℃ 
6) useful range: 0-10%(higher available) 
7) good immunity to other gases & humidity 
8) various voltages available from 3.3v to 9v 
9) 20mm package 


APPLICATIONS of carbon dioxide sensor C20: 
Modified atmospheres 
Indoor air quality 
Stowaway detection 
Cellar & gas stores 
Combustion control 
Shipping containers 
Atmospheric research 
Greenhouses 

• CO2 Carbon Dioxide sensor TGS 4161 

Description of carbon sensor TGS4161: 
TGS4161 is a new solid electrolyte CO2 sensor which offers miniaturization and low power consumption. A range of 350~10,000ppm of carbon dioxide can be detected by TGS4161, making it ideal for indoor air control applications. 

Features of carbon sensor TGS4161: 
1) High selectivity to CO2 
2) Compact size 
3) Low dependency on humidity 
4) Long life and low cost 
5) Low power consumption 

Applications of carbon sensor TGS4161: 
1) Indoor air quality control 
2) CO2 monitors

• CO2 Carbon Dioxide sensor TGS 4160 

Description of carbon sensor TGS4160: 
TGS4160 is a new solid electrolyte CO2 sensor which offers miniaturization and low power consumption. A range of 300~5,000ppm of carbon dioxide can be detected by TGS4160, making it ideal for indoor air control applications. 

Features of carbon sensor TGS4160: 
1) High selectivity to CO2 
2) Compact size 
3) Low dependency on humidity 
4) Long life and low cost 
5) Low power consumption 

Applications of carbon sensor TGS4160: 
1) Indoor air quality control 
2) CO2 monitors 

Objective of this project

Air pollution is when the introduction of chemicals, particulate matter or biological materials starts to contaminate the air where it may cause harm and discomfort to human being and other living organisms. It also damages the natural environment and the atmosphere. The World Health Organization (W.H.O) stated that 2.4 million people died each year directly attributed by air pollution, with 1.5 million of these deaths was attributable by indoor air pollution. The Air Quality Index (AQI) which also known as the Air Pollution Index (API) or Pollutant Standard Index (PSI) is a number used by many government agencies to characterize the quality of the air at a given location. As the AQI increases, an increasingly large percentage of the population is likely to experience the increases of severe adverse health effects

Because of that, this project intends to produce new air quality monitoring system that is user-friendly in monitoring air quality continuously and efficient in prevent air pollution also reduce hazard cause of the air pollution and 

• To create new device and systems that cans automatic function so that air pollution can be monitoring time by time.
• To reduce the size of air monitoring pollution to make it as a portable unit and can be put in tiny space.
• To develop device that friendly user by give short-term warning of pollution risk to give early warning to people can make early preparation.
• To development of air quality monitoring system’s reliability estimate techniques by considering the failure and repair rate of the air monitoring component.

About Development of Air Quality monitoring System

For the first idea this project is about the development of automated  monitoring device for environmental air pollutant detection.  The main part of the device will consists of a detector,  microcontroller and timer circuit.  The gas sensor will be used to detect air contaminant level,  in which the detection through the sensor measures  in unit of part per million (ppm). A PIC Microcontroller  will be utilized to  convert the analogue signal from the sensor  into digital signal which finally displays the  result through the liquid crystal display (LCD)