Standardized Comparison of Three Typical Industrial Gas Detector
The semiconductor sensor gas detector is manufactured based on changes in resistance. Tin dioxide experiences a rapid decrease in resistance when exposed to alcohol gas at high temperatures, and an alcohol sensor has been developed based on this principle. This type of sensor has the characteristic of low cost and is very suitable for detecting civilian gases. Environmental factors have a significant impact on semiconductor sensor gas detectors, leading to unstable detection results. And the output parameters of this gas detector cannot be determined, making it unsuitable for places that require accurate measurement.
2, Characteristics Analysis of Combustion Sensors
A combustion sensor is a high-temperature resistant catalyst layer prepared on the surface of a platinum resistor. When the temperature is high enough, combustible gases will undergo catalytic combustion, which increases the temperature of the platinum resistor and reflects the concentration of combustible gases through the resistor. The detection range of the catalytic combustion sensor gas detector only includes flammable gases, and if the gas cannot burn, the sensor will not produce a reaction. Catalytic combustion gas detector has accurate, fast and long-lasting reaction.
3, Analysis of Types of Electrochemical Sensors
A significant portion of its flammable, toxic, and harmful gases have electrochemical activity and can be electrochemically oxidized or reduced. The principle of the original battery type gas sensor is roughly the same as that of a dry battery. The current detection of toxic and harmful gases mainly relies on constant potential electrolytic cell gas sensors. A concentration battery type gas sensor can generate a concentration dependent electromotive force and detect gas concentration, such as an oxygen sensor used in automobiles.
