What are the detection principles of flammable gas detectors
The catalytic combustion type combustible gas detector uses the resistance change of refractory metal platinum wire after heating to determine the concentration of combustible gases. When combustible gas enters the detector, it causes oxidation reaction (flameless combustion) on the surface of the platinum wire, and the heat generated increases the temperature of the platinum wire, resulting in a change in the resistivity of the platinum wire. This change is used to determine the concentration of combustible gases.
The infrared optical combustible gas detector uses an infrared sensor to detect hydrocarbon combustible gases in the on-site environment through the absorption principle of an infrared light source. This type of detector uses a patented "small plug and play replaceable" infrared optical sensor, which has long-term stability and minimal periodic maintenance requirements. Infrared gas sensors are an excellent alternative to traditional catalytic combustion sensors in certain measurement environments.
Both types of detectors have their specific application environments and advantages. For example, catalytic detectors are suitable for environments with frequent exposure to catalytic toxic gases and high flammable gas emissions, while infrared optical detectors are more suitable for oxygen deficient environments and environments where detection is difficult to achieve. Typical application scenarios include offshore operation platforms and drilling platforms, refineries, petrochemical plants, compressed natural gas and liquefied gas treatment, wastewater treatment, chemical plants, pump stations, and thermal power plants
