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Talking about gas sensor selection skills and its advantages

by:Rika Sensors     2021-10-17
The so-called gas sensor refers to a sensor used to detect the presence of a specific gas in a certain area and/or to continuously measure the concentration of gas components. With the continuous development of society, the role of gas sensors has become more and more. It can be said that most of the convenience we feel in life comes from it. For example, testing the air quality, checking the alcohol detector for drunk driving and so on. Gas sensors can show more effective functions.



According to different working principles, there are many categories of gas sensors, such as thermal gas sensors, electrochemical gas sensors, electrochemical gas sensors, magnetic gas analysis sensors, optical gas sensors, etc., for all walks of life Gas research and analysis have played an irreplaceable role.



Gas sensor selection skills



Gas sensor is a kind of high-tech product. For people who are new to this kind of product, they may not know it very well. Therefore, when choosing, I don’t know what factors to choose. The following are some common ones. Gas sensor selection skills: The gas detected by the gas sensor is generally divided into three situations: 1, non-toxic or low-toxic flammable 2, non-flammable and toxic 3, flammable and toxic.



According to these three different situations, we generally need to choose different gas sensors according to the different detection objects. For example, when measuring explosive gases, you can choose a detection alarm with a combustible gas sensor, and when measuring toxic and harmful gases, you can choose a detection alarm with a related gas sensor. For example, to detect indoor formaldehyde gas, you can use a formaldehyde detector with a formaldehyde sensor.



In addition to selecting the relevant gas sensor, we also need to determine the application types of the gas sensor, which are usually divided into fixed and portable. For long-term leak detection in production or storage positions, fixed gas detectors containing relevant gas sensors are required; for example, other maintenance detection, emergency detection, entry detection and roving detection can use portable gas detection equipment.



The advantages of gas sensors



1. Response time: The time required for the output change to reach the specified percentage of the stable value (generally 70% or 90%) when the gas concentration contacted by the sensor undergoes a step change.



2. Sensitivity: The difference or ratio between the output of the component (voltage, current, resistance, etc., the same below) under a certain gas concentration under specified working conditions and the output in clean air or reference gas .



3. Linearity: the degree of deviation between the actual output value curve of the sensor and a certain straight line.



4. Stability: Under the specified working conditions and within a certain working period, the output change of the sensor does not exceed the allowable error.



5. Selectivity: Refers to the sensor's ability to recognize gas types.




Gas sensor is one of the key research and development directions in the current sensor field. In many industries that we are familiar with, there are application scenarios for gas sensors. Gas sensors span many fundamental and applied disciplines such as functional materials, electronic ceramics, optoelectronic components, MEMS technology, nanotechnology, and organic polymers. Gas sensors with excellent performance can further improve the level of information collection, processing, and deep processing, enhance the accuracy of real-time prediction of safety accidents, continue to solve hidden accidents, and greatly reduce the occurrence of safety accidents, especially major accidents. It can effectively realize the electronicization of safety supervision and production safety supervision and management, change passive disaster relief into active disaster prevention, and advance production safety to scientific management.









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