 Hi! Welcome to Isomacademy. Let's begin with all you need to know about hydrogen sulphide. Hydrogen sulphide is colourless, poisonous and corrosive gas with one sulphur atom bonded to two hydrogen atoms. It is also known as super gas, swamp gas and manual gas. It has a noticeable or rotten egg odor detectable at concentration as low as 0.5 ppb. It is highly flammable, explosive gas producing toxic vapours and gases. Hydrogen sulphide is slightly heavier than air. It may travel along the ground and accumulate in enclosed, poorly ventilated and low-lying areas. Most of the atmospheric hydrogen sulphide has natural origins, about 90%. It is produced from anaerobic bacterial breakdown of organic sulphur compounds. Once released, it remains in the atmosphere for about 18 hours before oxidizing to form sulphur dioxide. It further reacts to form sulphate particles. Hydrogen sulphide being somewhat water soluble results in the formation of sulphohydric acid contributing to acid rain. H2S is naturally released from volcanoes, geothermal vents, sulphur springs and lakes, salt marshes and estuaries. It is one of the major pollutants emitted from sewage and wastewater treatment plants, utility facilities and sewers. Other sources include drilling, production and refining of crude oil and natural gas, production of coke, viscous rayon, wood pulp and so on. Sulfur extraction processes, tanning, mining, sugar bead processing and hot asphalt paving. At low levels of hydrogen sulphide exposure, symptoms such as irritation of the eyes, nose and throat occur. H2S does repeat accumulate in the body, but repeated and prolonged exposure can cause low blood pressure, headache, business, nausea and vomiting, as well as coughing and difficulty in breathing, while high levels can cause shock converges, coma and death. Continuous and high level exposure of H2S can quickly deaden a person's sense of smell, making odor of hydrogen sulphide an unreliable indicator of its presence. Hence, other means such as use of hydrogen sulphide monitors is a viable solution to provide adequate warning of hazardous exposure. Different working principles for hydrogen sulphide monitoring in the ambient environment are pulsed UV fluorescence, lead assisted tape method, semiconductor and electrochemistry. At Oizom, we measure hydrogen sulphide on principle of electrochemical sensing. It operates based on diffusion of hydrogen sulphide molecules into sensor, which results in the production of an electrical signal proportional to the hydrogen sulphide concentration. Oizom's odosense is the real-time odor emission tracking solution. It continuously detects, measures and monitors the odorful gases contaminants including hydrogen sulphide, ammonia, sulphur dioxide, methylmer captain, TVOCs, methane, formaldehyde and weather parameters like temperature, humidity, wind speed and wind direction. With the help of meteorological data, odosense can trace the odor and dispersion plume incited by conditions like wind speed and wind direction. Odosense is a proactive approach to measure real-time odor emissions. This makes it an ideal choice for landfill sites, wastewater treatment facilities, fertilizers, paper pulp industries and soil treatment sites. Real-time monitoring of hydrogen sulphide levels helps in determining the source of odor as well as formulating an action plan to control odor. With this, I hope you now know all about hydrogen sulphide. For any questions or suggestions, please contact us. Thank you and happy learning.