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Cleanroom fogger performance is compared below between ultrasonic foggers and ultrapure foggers. Fog volume, fog density, visual fog distance is the most important parameters, along with cost. The ultrapure fogger uses liquid nitrogen and De-ionized water or WFI (Water for Injection) to generate a high purity fog with a fog output of ~ 5.0 cubic meters of ultrapure fog per minute for ~ 70 minutes providing ~ 20-30 feet visible airflow distance, providing high volumes of ultrapure fog for larger cleanrooms. Water for Injection is often used in ISO suites, sterile rooms and clean rooms. Liquid nitrogen is filled into an LN2 dewar, while DI or WFI Water is filled into a Stainless Steel chamber. Water is brought to a high temperature and the LN2 boils at room temperature, allowing the vapor from both liquids to combine and form a highly dense, ultrapure fog at 2 to 3 micron diameter and high fog density. The high purity fog exits at very low pressure, making it buoyant in the airflow. Take a look below at the performance of the different foggers to understand what the capabilities of the different foggers.

A nitrogen fog generator creates the purest form of fog, particle free, non-contaminating, leaving no contamination or residue behind; thus no cleanup after fog use is required. The ultrapure fog enters the airflow at very low pressure and does not create airflow turbulence. It is CE Mark and compliant to ISO and USP guidelines, and can be used in Class 1 - 100,000 clean rooms for airflow, turbulence visualization, flow balancing and contaminant transport studies. The AP35 ultrapure fogger produces a high volume of fog to visualize airflow and turbulence in clean rooms, sterile rooms and ISO rooms.


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