Precise air analysis are very time consuming and expensive. To test air outdoors or in some factory you need to contact specialize company that takes air samples from designated place, then they drive air samples to laboratory and test them in gas chromatograph, where afterwards in chromatograms you can see what kind of components where in air at that moment. There are some mobile organic solvent vapour detecting devices but main problems are variety of organic solvent vapours and precise concentration readings. GrayWolf DirectSense can work with up to 6 sensors per probe (even more probes with Y-adapters). Available sensors; differential pressure, airspeed, TVOCs, CO2, %RH, ºC / ºF, CO, O3, NH3, H2S, NO, NO2, SO2, Cl2, HCN, HF, HCl, F2, HCHO and other parameters. These are just some of vapours that are around us, that’s way there is need for precise and wide detection variety organic solvent vapour detector. There were made ethylene vinylacetate (EVA) and nanostructured carbon composite for organic solvent vapour detecting.