Application scenarios of combustible gas detectors
As the main energy source in production and life, combustible gas can be seen everywhere in industrial production and daily life. Common flammable gases include hydrogen, carbon monoxide, methane, propane, ethylene, hydrogen sulfide, etc. Moreover, many flammable gases themselves are toxic and harmful gases, such as carbon monoxide, hydrogen sulfide, chlorine, etc. Once these flammable gases exceed a certain concentration, they may explode and cause fire accidents. Their detection requires specific analysis of the specific situation.
Different application scenarios have different requirements for gas detectors, and they also have different requirements for their core components - gas sensors. How to choose a suitable combustible gas sensor for our detector?
Ampal combustible gas sensors mainly include semiconductor type, catalytic combustion type and infrared type, which are suitable for combustible gas detection in different scenarios.
1 semiconductor type
In general household places, it is usually required to quickly detect flammable gas leaks when the concentration is low, and achieve a single-point alarm. It must also meet long-term maintenance-free requirements and be convenient for home use.
The semiconductor combustible gas sensor has a lower detection limit and a longer service life, and there is only the adsorption and desorption process of gas during the detection process. Severe oil smoke in the kitchen is less likely to remain on the surface of sensitive materials, making it the best choice for home alarms. .
2 Catalytic combustion type
The catalytic combustion gas sensor is currently the most widely used sensor in the world. It has a fast response speed. Up to the lower explosion limit concentration (LEL), the output of the sensor is almost proportional to the gas concentration, so the accuracy and repeatability are very high. Suitable for quantitative detection in coal mines, petroleum, chemicals, gas and other fields.
However, the working temperature of catalytic combustion sensors is high, and the catalyst is easily deactivated. At the same time, the silicone and sulfide released from adhesives and rubber products in the surrounding environment can easily poison the catalyst, causing sensor failure. In industrial sites, alarms are generally calibrated regularly using standard gases and the amplification is adjusted to prevent the sensitivity of the catalytic sensor from attenuating and causing a significant deterioration in accuracy.
3 infrared type
The infrared combustible gas sensor uses the non-dispersive infrared (NDIR) principle to detect hydrocarbon combustible gases present in the air. It has the advantages of good selectivity, strong anti-interference ability, and is not easy to be poisoned, and does not require frequent recalibration. It has played an important role in industrial safety and gas detection in recent decades.
Neuforth Pathfinder Series Gas Detectors
The Pathfinder series gas detector is a professional and dedicated composite gas detection product designed and launched by Neuforth Technology for professional users. This product is mainly used to detect the concentration of toxic, harmful, flammable and explosive gases in limited space operations.
