Gas sensor applications

Gas sensor applications are very wide-ranging and are found in smart home, automotive electronics, industrial processes, environmental monitoring, consumer electronics and other industries.


Gas sensor end-products of a wide range of types, a variety of uses, and a high degree of personalization, not only can be used to detect flammable gases in the environment, such as natural gas, liquefied petroleum gas, hydrogen, etc., but also able to detect toxic and harmful gases, such as carbon monoxide, hydrogen sulfide, ammonia, formaldehyde, benzene, toluene, etc., but also to detect oxygen, carbon dioxide and other gases that are closely related to human activities, but also in the drink-driving monitoring, Medical monitoring and other fields for the detection of alcohol, 13CO2 and other gases.

Detection of toxic gases in production operations
Detection of toxic gases in production operations

Detection of toxic gases in production operations

Toxic gases may be generated in various clear pools, thickening pools, underground sewage, sludge gate wells, and non-flowing sewage pools, and are of various types and complex compositions. According to the different ways of harm, these gases can be divided into three categories: toxic gases, corrosive gases and flammable and explosive gases.


Toxic gases including methane, hydrogen sulfide, carbon monoxide, carbon dioxide, hydrogen cyanide, etc., these gases will be through the respiratory organs in the human body internal organs cause harm, but also inhibit the body’s internal tissues or cells of the ability to exchange oxygen, causing muscle tissue hypoxia and asphyxiating poisoning, so also called asphyxiating gas.


Corrosive gases are generally disinfectant gases such as chlorine, ozone gas, chlorine dioxide gas leakage, corrosive effect on the human respiratory system to produce poisonous.


Flammable and explosive gases and air mixed to a certain proportion, when the open flame will cause combustion or even explosion, and cause harm, such as methane, hydrogen and so on.

In order to ensure safety, the staff in the detection of sewage pipeline, can use multi-sensor collection of all-in-one gas detector, can simultaneously detect combustible gases, oxygen, carbon monoxide, hydrogen sulfide and other gases, in the sewage pipeline construction, shaft construction, tunnel construction is very practical.

Harmful gas test for new house decoration
Harmful gas test for new house decoration

Harmful gas detection for new home renovation

Research shows that more than 90% of the harmful gases in the newly renovated rooms are seriously exceeded, formaldehyde, for example, the content of the new home when the initial installation is completed in more than 2.5 ppm, some as high as a dozen or even dozens of ppm. in the new version of the “Indoor Air Quality Standards” (GB/T 18883-2022), the formaldehyde content of the 1-hour average should not exceed 0.1mg/m. In addition to formaldehyde, there are many other gases that affect the quality of indoor air, carbon dioxide, ozone, VOCs, etc. These are the object of gas sensor detection.

In addition to formaldehyde, there are many other gases that affect indoor air quality, such as carbon dioxide, ozone, VOCs and so on, all of which are detected by gas sensors. Gas sensors and air conditioning, air fresheners, air purifiers, etc. into one, to achieve the purpose of combining the detection and treatment of indoor pollution is one of the most common applications at present.

Indoor PM2.5 testing
Indoor PM2.5 testing

Detection of PM2.5 in indoor air

Indoor PM2.5 mainly comes from smoking, frying fumes and incomplete combustion of gas, etc., which can easily lead to a variety of diseases, especially for the elderly, children, infants, or people with respiratory and cardiovascular system diseases are particularly serious harm.

In practical applications, infrared sensors can not accurately measure the concentration of PM2.5 due to the lack of precision, mainly used for the detection of large particle size, high concentration of industrial and mining dust. While the laser principle sensor is mainly used in the field of PM2.5 detection, to quantify the quality of PM2.5 with precision, which can be embedded in home air quality monitors and air purifiers. In addition, laser sensors are also used in IoT data acquisition and environmental quality testing.

Vehicle Air Detection
Vehicle Air Detection

Detection of air quality and safety in new cars

Similar to the serious air pollution in a new house, the air pollution in a new car should not be ignored. The source of air pollution in the car mainly comes from the car body itself, decorative materials, etc., and these toxic substances such as benzene, xylene, formaldehyde, etc. cause irreversible damage to the human body.


Another repeated reports of hazardous gases in the car, is known as the “silent killer” of carbon monoxide, its main source is the car engine and car exhaust, due to parking when the air conditioning is opened and produced, if gathered in the car, the car will be due to the inhalation of this colorless and tasteless poisonous gas in the unconscious poisoning death.

In recent years, the development of vehicle sensors is gaining momentum, carbon dioxide sensors, PM2.5 sensors, VOC sensors, alcohol sensors and other gas sensors are gradually integrated into the car. According to the specific needs of use, there are a variety of high-end models equipped with gas sensors linked to the air conditioning system, and the aftermarket gas pollution detection products in the car is a wide variety of products, to name a few.

In these specific application cases, the gas sensor can fulfill the task of detection to provide users with accurate data for reference, but more than that, based on these precise data linkage and intelligent control is the future direction of development.


With the rapid development of the Internet and the Internet of Things, gas sensors in the emerging smart home, wearable devices, smart mobile terminals and other fields of application by leaps and bounds, significantly expanding the application space, the demand has changed by orders of magnitude. Looking forward to the development prospects of gas sensors, the increasingly diverse applications will create a more massive market size.