It is an autonomous system for measuring low concentrations of pollution. This system can detect very low concentrations of substances. For example, in case of H2S, can detect concentrations from 0.001 ppm. The odor generated by biological and industrial wastewater treatment, water treatment plants and a range of industrial products is a complex mixture of organic and inorganic components. As an indicator of odor is generally referred to as hydrogen sulphide (H2S), which by its odor resembles a "rotten egg" and has a smell threshold of about 0.5 ppm. Using this system, you can get real-time information about the concentration of pollutants in the neighborhood to react in a timely manner to minimize negative environmental impacts.