The ultransonic diffuer creates a fine mist and sends tiny oils particles into the air. Generally you add water and the water and oils are distributed into the air. This is particularly good in drier winter months because moisture is added to the air. Because a small amount of oil is added to water, these are very economical to run. Some may have timers.
Nebulizing diffusers do not use added water. The diffuse the straight oil which is broken up into super tiny molecules. Because this type of diffuser disperses the entire oil into the air and breaks it up into much smaller particles than other diffusers, this is type of diffuser has more therapeutic qualities.
但你講架水機d霧不斷向下沉, 係唔係你架係一般水機而唔係for eo use? d霧應該跟本散左唔會見到佢沈架?