How does A Semiconductor Gas Sensor Work?
A semiconductor gas sensor uses a semiconductor gas sensor to contact a gas to cause a change in semiconductor properties to detect a component of a specific gas or to measure its concentration.
Semiconductor gas sensors are generally classified into two types, resistive and non-resistive. Resistive semiconductor gas sensors use gas-sensitive semiconductor materials such as tin oxide (SnQ2), manganese oxide (MnO2) and other metal oxides to make sensitive components when they absorb fumes such as hydrogen, carbon monoxide and alkanes. In the case of ether, drunk, benzene, natural gas, etc., a reduction reaction occurs, and heat is released to increase the temperature of the element and the resistance changes. Using this characteristic of the semiconductor material, the composition and concentration of the gas are converted into electrical signals for monitoring and alarming.
A gas sensor can be seen that the components are sensitive to different gases, such as diethyl ether, digestive, hydrogen, etc., and have lower sensitivity to methane. Generally, as the concentration of the gas increases, the resistance of the element increases significantly, and within a certain range, it has a linear relationship.
