Gas detection is an important part of health and safety. It is important to understand that not all gases and vapors are equally dangerous. For example, the surrounding air is almost 80% nitrogen, but we are always wary of liquid nitrogen, which can be dangerous when stored at very low temperatures.
Vapors can be more dangerous than gases, especially when they arise from flammable liquids. Often, containers with flammable liquids continue to retain small amounts of liquid or vapor after emptying, and they should be thoroughly cleaned and ventilated before reuse. Otherwise, there will be fires or, even worse, explosions.
Many incidents caused by toxic gases have one thing in common - people are not aware of the dangers that surround them. For example, not everyone can smell sulfur-containing gases, such as hydrogen sulfide, which in some cases doesn't smell at all.
It is important to have gas detection equipment, ensuring that the personnel understand the hazards and have appropriate RPE available.