Optoelectronic multi-sensor of SO2 and NO2 gases

In paper as the gas sensitive material of primary transducer of SO2 and NO2 optoelectronic multi-sensor the 5CB nematic liquid crystal (NLC) are used. The sensitivity of our sensitive element by means of adding to 5CB the cholesteric liquid crystal (CLC) was increased. The electrical realization of our multi-sensor was on ATmega 8 microcontroller.