Hydrogen is not toxic, but it is suffocating, flammable and explosive. Inhaling a small amount of hydrogen will not cause poisoning, but after inhaling a large amount of hydrogen, because hydrogen is relatively light, it will spread around, the alveoli will swell, the entire lung will be like edema, compressing the heart, and breathing will become difficult, and in severe cases it will be dangerous. Hydrogen is flammable and explosive, and it is easy to explode, so pure hydrogen is somewhat dangerous.If there is a strong explosion during combustion, it means that the hydrogen is impure; it is very easy to explode, so this must be given enough attention.
If a hydrogen leak occurs, the solution is: quickly evacuate the personnel in the leaking contaminated area to the upwind area, isolate it, and strictly restrict entry and exit. Cut off the fire source. It is recommended that emergency response personnel wear self-contained positive pressure respirators and fire protection clothing.
Generally, in hydrogen production plants and battery manufacturing plants, H2 and hydrogen leakage detection is often required. The detection range is 0-100%LEL, i.e. 0-4%VOL, and 0-1000ppm is used to detect trace leakage. A fixed hydrogen detector can monitor the gas concentration value 24 hours a day. A portable handheld hydrogen detector can temporarily detect the hydrogen concentration during inspections or at work to avoid danger or explosions.
Hydrogen is a dual-nature gas.
(1).Dual-nature gas is a gas that is both flammable and explosive and toxic and harmful to personnel, such as ammonia and hydrogen;
(2).Dual-nature gas can detect its leakage regardless of whether it is flammable or toxic. The difference is that the catalytic combustion detection principle is used to measure the flammability and explosiveness, and the lower explosion limit is measured; the toxicity is measured using a special electrochemical principle (except for special gases), and the concentration volume ratio is measured, which has a fast reaction and more accurate detection. Of course, the price is also relatively high.
It is usually used for the flammability characteristic. If there are workers in the environment, they can use a special hydrogen toxic gas alarm. This leak-detecting hydrogen alarm is more effective in protecting personal safety. If there are no workers on site, a combustible gas alarm can be used to detect it, so that the lower explosion limit of the gas can be measured.
Therefore, when users choose a portable hydrogen detector, they should see whether the purpose of the detection is to prevent hydrogen leakage from causing harm to personnel or to prevent hydrogen leakage from causing explosions.