Chemiresistor gas sensor types and features
Chemiresistor gas sensor is a kind of commonly used gas sensor, which is widely used in the fields of environmental monitoring, industrial safety and life science. They detect the gas concentration by measuring the resistance change between the gas and the electrode, and have the advantages of high sensitivity, fast response speed and low cost. According to the different working principles and sensing materials, Chemiresistor gas sensors can be divided into various types, and the following will introduce the common ones.
An oxygen sensor is a sensor that converts oxygen concentration into a change in electrical resistance. It usually consists of two electrodes, one coated with an oxide and the other acting as a reference electrode. When oxygen molecules react with the oxide, it changes the state of charge on the surface of the electrode, resulting in a change in resistance. Oxygen sensors are widely used in medical, bioscience and environmental monitoring fields, and can accurately measure oxygen concentration.
A carbon dioxide sensor is a sensor used to measure the concentration of carbon dioxide. It usually uses a carbonate material as the sensing element, which causes a change in resistance when carbon dioxide molecules react with the carbonate. CO2 sensors are widely used in indoor air quality monitoring, greenhouse gas control, and industrial process control.
A formaldehyde sensor is a sensor used to detect the concentration of formaldehyde. It usually uses formaldehyde-sensitive material as the sensing element, and when the formaldehyde molecule reacts with the sensitive material, it results in a change in resistance. Formaldehyde sensors are widely used in fields such as indoor air quality monitoring and household appliances to quickly and accurately detect formaldehyde pollution.
An ammonia sensor is a sensor used to measure the concentration of ammonia. It usually uses a metal oxide as the sensing element, which causes a change in resistance when the ammonia molecules react with the metal oxide. Ammonia sensors are widely used in agriculture, environmental monitoring, and industrial safety to monitor ammonia leaks and pollution in a timely manner.
A carbon monoxide sensor is a sensor used to detect the concentration of carbon monoxide. It usually adopts metal oxide or metal semiconductor as the sensing element, when the carbon monoxide molecule reacts with the surface of the sensing element, resulting in a change of resistance. Carbon monoxide sensors are widely used in gas detection, automobile exhaust monitoring and indoor air quality monitoring, etc. They can detect the danger of carbon monoxide poisoning in time.
Above are several common types and characteristics of Chemiresistor gas sensor. They detect the gas concentration by measuring the resistance change between the gas and the electrode, and have the advantages of high sensitivity, fast response speed and low cost. Different types of sensors are suitable for different gas concentration ranges and application areas, which can meet the needs of different users. With the continuous progress of science and technology, Chemiresistor gas sensor will further improve its performance and application range, providing people with more reliable and accurate gas monitoring solutions.
