The global market for gas sensors was valued at USD 1,664.8 million in 2012 and is expected to grow at a CAGR of 5.7% during the forecast period from 2012 to 2018 and reach USD 2,328.3 million by 2018. Strengthening government regulations for safety at workplace and emission control are primarily driving the market for gas sensors. Gas sensors are used for detecting concentration of different combustible and toxic gases and are witnessing increased demand from industrial, petrochemical and automotive sectors. Gas sensors in industrial applications are used for detecting gas leaks and monitoring indoor/outdoor air quality. It helps in detecting the presence of toxic and combustible gases and thus prevents mishaps.
Gas sensors are devices that detect the concentration of gas and convert it into an electrical signal. Varieties of gas sensing technologies are used for this purpose. Some of the major technologies used include electrochemical gas sensing, semiconductor gas sensing, PID (photoionization detector) gas sensing, catalytic gas sensing, infrared gas sensing, solid state gas sensing and others. Gas sensors based on electrochemical and semiconductor gas sensing technologies are the most popular and are commonly used for detecting toxic and combustible gases. 
Low cost and high efficiency of electrochemical and semiconductor gas sensors are responsible for driving the demand for these types of gas sensors. They together, accounted for a share of over 35% of the total gas sensors market in 2012. Gas sensors based on electrochemical technology cost around USD 40 per unit. Gas sensors based on semiconductor technology cost only USD 2 to 5 per unit. Infrared technology based gas sensors are the most expensive and cost around five times that of electrochemical technology based gas sensors (around USD 200 to USD 250). Infrared gas sensors, also known as precision gas sensors are generally preferred for high-end industrial applications where high level of specificity and accuracy is required. Sensors based on PID gas sensing technology are preferred for detection of volatile organic compounds. Catalytic sensors are extensively used for detecting combustible gases such as methane, hydrogen, butane and others. 
Some of the major end-user industries utilizing gas sensors include medical, building automation, domestic appliance, environmental applications, petrochemical industry, automotive industry, industrial applications and others. Industrial sector comprises manufacturing and process industries. It is the largest end use industry for gas sensors in terms of revenue generation. Growing concerns towards occupational safety and government mandates for emission control are primarily driving the demand for gas sensors. Automotive industry is another important contributor to the global gas sensors market. The need for better comfort and safety in automotives has led to incorporation of different types of gas sensors in automobiles for cabin air quality, monitoring fuel emission, and others. Asia Pacific is the largest automotive market globally, and rising use of gas sensors in automobiles for different applications has significantly contributed to the share of Asia Pacific in the global gas sensors market. Presently, the global gas sensor market is dominated by Europe; however, Asia Pacific is expected to surpass Europe and become the leading regional market for gas sensors globally, by 2015. 
City Technology, owned by Honeywell is currently leading the global gas sensors market with a share of around 28% followed by Alphasense with around 15% share in 2012. Other important players engaged in gas sensors manufacturing include Membrapor, Dynament, Figaro Engineering, Draeger, Robert Bosch, and others.
The research report on the global gas sensors market provides in-depth analysis of the market based on its major product segments, applications, and geographies for the period from 2012 to 2018. The report provides complete understanding of the driving factors, restraints, and prevailing trends behind the popularity of gas sensors. It also presents estimates and forecast for all the market segments and explains the impact of various factors on these segments.
Gas sensors are the devices that sense concentration of various gases within an area, usually as a part of a safety system. Use of gas sensors is the most effective way to sence actual gas concentrations during gas leaks or gas generations. Some of the major gas sensor products are electrochemical gas sensors, solid state gas sensors, PID (photoionization detectors), catalytic gas sensors, infrared gas sensors, and others. Gas sensor devices have application across various sectors and some of the major applications of gas sensors are in process industries, automotive industry, building automation, industrial applications, medical applications, and others. 
Gas sensors are the devices that transform partial pressures or gas compositions measured in air or gases into an electric signal. Gas sensors comprise of two basic parts: a receptor enabling chemical recognition and a transducer transforming the chemical reactions into an output electric signal. The challenge of gas detection prevails in every market sector. The gas sensors based on semiconductor technology are most cost effective followed by the electrochemical gas sensing technology. Electrochemical gas sensors are used for detecting the presence of oxygen, toxic gases, environmental pollutants, and some combustible gases. IR gas sensors and catalytic sensors are used for detecting combustible gases.
Gas sensors market report include analysis, market size and forecast of technologies such as electrochemical gas sensing technology, Semiconductor gas sensing technology, solid-state /metal oxide semiconductor (MOS) gas sensing technology, PID (Photoionization detectors) gas sensing technology, Catalytic gas sensing technology, infrared (IR) gas sensing technology and other (paramagnetic, thermal conductivity, and so on) gas sensing technology. The major product segments of gas sensors include in the gas sensors market report are oxygen sensors, carbon dioxide sensors, carbon monoxide sensors, nitrogen oxide sensors, and other sensors such as methane, ammonia, and so on.
Geographically, the gas sensors market is categorized into four regions, namely, North America, Europe, Asia Pacific, and Rest of the World (RoW). The report presents the market size and forecast for these regional markets.  A qualitative analysis of market dynamics for gas sensors is presented in the market overview section in the report. 
The gas sensors market is divided into sub-segments based on various parameters, in order to enable stakeholders across the supply chain to take advantage of the strategic analyses included in the report. The competitive landscape section in the report presents market share analysis of major players in the global gas sensors market in 2012. The usage of gases has increased significantly in different applications, thus creating a risk of accidents due to fire, explosion, poisoning, and oxygen deficiency. As a result, there is growing demand for gas sensors to prevent such accidents. 
Apart from the above cross sectional analysis of the market, the report also provides competitive profiling of major players engaged in gas sensor manufacturing, their market positioning, business strategies, and various recent developments. Some of the major players profiled in the report include City Technology, Figaro Engineering Inc, Membrapor AG, Dynament Ltd, and Alphasense among others. The report also provides better understanding of the market with the help of Porter’s five forces analysis and further highlights the competitive scenario across different levels of the value chain. In all, the report provides detailed analysis of the global gas sensors market along with the market forecast, in terms of revenue (USD million) for all the segments during the forecast period from 2012 to 2018.