... made up of all transistor circuit. Via electronic circuit ,the wafer can produce ultrasonic when electrified,then via aqueous medium, cause ... prevent from oxygenation and begriming ,otherwise,the service life of wafer can be effected),you must change water in trough when ... waferFog become smallerSmall fogWafer aged or scaledShut off power, clean wafer or change it.Bad film or bad settingShut off power ...