Ozone (O3) a new chemistry molecule with strong oxidance and chemistry potential of 2.07 eV has positive prospect to be apllied in the industry and enviromental fields (e.g sterilization of gas and fluid waste) as well as in the agricultural chemistry field (e.g sterilization of the seed and fruits-vegetables processing). A dielektric barrier dischange tube (DBDT) as the main component of the ozon generator has been designed and constructed. Ozone is formed by atmospheric pressure with discharge voltage of 25 kV and frequency of 1 5 kHz. the measurement results of one of the DBDT are secondary current value of 1 34 mA and secondary voltage of 18 38 kV yieding the power value of 24 63 watt which is approximating the 25 watt power value required. Ten units of 250 watt plasma ozonizer consisting of 100 watt DBDT and 150 watt DBDT have been constructed.