Hydrogen sulfide, or H2S for short, is a toxic, flammable gas that smells like a colorless rotten egg. A gas heavier than air. It is an extremely dangerous and deadly compound especially in the production of natural gas and crude oil. Hydrogen sulfide is also referred to by various names such as sulfur hydrogen or sour gas. Due to its lethal effect, these plants have to be measured and monitored frequently. The formation of hydrogen sulfide is the decomposition of sulfur-containing organic matter between geological layers in wells drilled to extract oil.

This is not always considered a reliable determinant, even if it is easy to discern with its distinctive odor. If hydrogen sulfide gas is mixed with the breathing air, people's ability to smell is lost very quickly. As such, even if hydrogen sulphide is present in the ambient air, its odor will no longer be recognized. Therefore, it is necessary not to rely on odor and to measure with the correct devices. The most effective method is to use approved detectors to detect the presence and density of this gas.

If high exposure to the hydrogen sulfide compound occurs, the person may lose consciousness within a very short time, such as a few seconds. Therefore, in cases where hydrogen sulphide is suspected, employees should move away from that area. This zone should be closed to the inlets before the hydrogen sulphide level in the air decreases to the required level.

Toxic air in enclosed spaces is the air that is composed of harmful gases that endanger the lives of its employees. Toxic air has a chemical effect on human organism and is harmful. It can even cause deaths depending on the exposure level. Hydrogen sulfide is one such gas. It is also among the explosive gases of hydrogen. Explosive air is air which contains flammable gases, such as hydrogen sulfide. Again, hydrogen sulfide is one of the chemical choking gases that can be found in closed environments. Chemical suffocating gases are toxic.

Hydrogen sulfide is a very common gas in petroleum fields, sewers and the chemical sector. It is a flammable gas and 6 is explosive in air. Since it is heavier than air, it is generally spread to the floor in the enterprises.

0,0001 level in the air shows itself with the smell of rotten eggs. However, if it exceeds this level, it will paralyze the olfactory nerves for a short time. If this air is continued to be inhaled, poisoning effects begin. Symptoms of poisoning begin at 200 cc / m3. Density increases to 600 cc / m3, causing death.

Occupational health and safety regulations require the determination of exposure of workers to a number of chemical substances in the workplace. For this purpose, some measurement, test and analysis studies are required by employers. According to the field of activity of the enterprises, measurements of hydrogen sulphide in the environment should be made. These measurements are carried out by authorized test and inspection institutions. During the measurements, legal regulations in force and standards published by domestic and foreign organizations are taken into consideration.