... 100G 200G 300G Ozone Generator Water Treatment CH-G Series Complete ozone machine built in oil-free compressor, ... and external electrodes are cooled by water with low temperature rise resulting in continuous work with high efficiency ... panel: Ozone output adjuster, Voltmeter, Ampmeter, Timer, Cooling water temperature indicator, Ozone Ampmeter, Main switch, Power supply switch, Emergency stop, ...