ZW-500 ozone power is researched and developed newly with PWM pulse width modulate serial technology and is suitable for the output of 3 -20g /h ozone. It has such advantages as 160-260 volts of input voltage, adjustable frequency of the power, adjustable ozone output and no rising temperature in 24 hours' continuous work. It the professional power that can meet the demand of such trades as pure water, the pipeline drinking machine, the laboratory, air cleaning and disinfecting.