Gas sensor development in the future

Gas sensor is a kind of a gas volume fraction is converted into corresponding electrical signal converter, has a good stability, high sensitivity, good selectivity, easy maintenance, long service life, etc. Engineering today is to introduce the specific situation to the future development of gas sensors, the hope can help users better understand gas sensor.

a, focuses on the research and development of new gas sensitive material and production process

the study of gas sensor material, metal oxide semiconductor material Zn0, SIlo2, Fe203 has become mature, especially in C than, C2H5OH, CO gas detection aspects. This work has two main directions:

1, is the use of chemical modification methods, the existing gas sensitive membrane materials for doping, surface modification and modification treatment, and to improve the film forming process and optimization, to improve stability and selectivity of gas sensor;

2, is a research and development of new gas sensitive film materials, such as complex and hybrid semiconductor gas sensitive material, polymer gas sensitive material, in which new material with different gas has high sensitivity, high selectivity, high stability. Due to the sensitive organic polymer materials has rich materials, low cost, the membrane process is simple, easy to compatible with other technologies, the advantages of working at room temperature, has become a research hotspot.

2, the development of new type gas sensor

with the traditional mechanism, and some new effect, preferred to use crystal materials ( Silicon, quartz, ceramic, etc. ) , the use of advanced processing technology and microstructure design, develop new type of sensor and sensor system, such as optical waveguide, polymer surface acoustic wave (saw) gas sensor and quartz resonant the development and use of gas sensors, microbial gas sensor and bionic research of gas sensor. With the application of new material, new technology and new technology, the performance of gas sensor more hasten is perfect, make the sensor miniaturization, micromation and multi-functional has good long-term stability, easy to use, price is low wait for an advantage.

3, intelligent gas sensor

with the continuous improvement of people's living standard and the increasing focus on environmental protection, for all kinds of poisonous and harmful gas detection and monitoring of atmospheric pollution, industrial waste gas as well as the quality of food and living environment detection for gas sensor is put forward higher requirements. Nano, the successful application of new materials developed technology such as thin film technology for gas sensor integration and intelligence provides a good condition. Gas sensor will make full use of the micro mechanical and microelectronics technology, computer technology, signal processing technology, sensor technology, fault diagnosis technology and intelligent technology was developed on the basis of the multidisciplinary integrated technology. Development can simultaneously monitor a variety of automatic digital intelligent gas sensor is an important research direction in the field.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor