Atomizer is a device that is used to emit liquid droplets as fine spray. 'Atomize' here means splitting up a large body into small, discrete particles. It works on Bernoulli's principle. When high speed horizontal air passes over a vertical tube, it creates a low pressure and draws the air and liquid inside the vertical tube upward. Atomizer has a nozzle at the end of the horizontal tube which causes the liquid to break up into small drops and mixes it with the air.