In the activities of life, you have to breathe all the time. In the process of breathing, you inhale oxygen. After a series of cycles of the body, you will exhale carbon dioxide. People without oxygen are like fish leaving water, and birds without wings. Will be affected, and the final result is death. Many patients need oxygen when they are dying, because they are affected by serious diseases, and their breathing ability is reduced, so they need oxygen to maintain their lives. It can be seen that oxygen is very important. In an industrial workplace, if oxygen is insufficient, the lives of workers in the workplace will be threatened at all times. First of all, oxygen is a part of the air and a substance needed by the human body. Human cells need to function, and organs need the participation of oxygen to maintain health. Oxygen in the air is inhaled through the lungs and respiratory system. Oxygen is obtained and cells are metabolized normally. It can be converted into energy to provide the body to maintain normal life activities. Oxygen itself is not toxic, no harm to the human body, but inhaling too much pure oxygen can lead to poisoning, which is called oxygen poisoning, which is harmful to the human body at this time.

Under what circumstances will there be oxygen poisoning? For example, in a state of hypoxia, there will be a sense of suffocation, a short time will feel dyspnea, chest tightness, and finally serious and hypoxia death. Moreover, different oxygen concentrations will pose different life safety threats to the human body. Common poisoning phenomena with different oxygen concentrations mainly include: 23.5% oxygen enrichment, strong explosion danger, 20.9% oxygen concentration is normal, 19.5% oxygen minimum allowable concentration, 15-19% reduction in work efficiency, and can lead to head, lung and circulatory system problems, 10-12% shortness of breath, loss of judgment, purple lips, and 8-10% intelligence loss, fainting, unconsciousness, pale face, purple lips, nausea and vomiting, 6-8% 8 minutes, 10% fatal/6 minutes, 15% fatal/4-5 minutes, convulsions, respiratory arrest and death within 4-6% 40 seconds can be cured after treatment. The harm of oxygen to human body at these different concentrations is different. When underground in the mine, the staff should always be alert to the influence of oxygen concentration, because once underground, insufficient oxygen supply is prone to life accidents, so when underground, it is necessary to be equipped with safety detection devices to warn the concentration of underground oxygen content, so as to remind underground staff in time.

Generally, portable or fixed gas detection devices are equipped under mines. Common ones on the market include four-in-one portable detection instruments, oxygen concentration analyzers, oxygen content detectors, etc. The internal core components are oxygen sensors. Due to the life safety involved and the harsh environment under mines, this requires oxygen sensors to have high-precision output, anti-humidity interference and good linearity for continuous monitoring, which are all good, however, the most important thing is that oxygen sensors will face liquid leakage. The Alphasense oxygen sensor in Britain, which is now represented by science and technology, has perfectly solved the problem of liquid leakage. The manufacturer has developed a liquid-tight electrochemical oxygen sensor and applied for a technical patent. At present, the oxygen detection models O2-M2 and A2 under the mine have been guaranteed by the manufacturer to be completely liquid-tight, which is the best choice for oxygen detection under the mine.