Smoke studies in clean rooms with a cleanroom fogger using deionized water or WFI water - Applied Physics, Inc.


Applied Physics, Inc.

Clean Room Fogger, CRF4

Ultrapure Nitrogen Fogger, AP35

Calibration Wafer Standards

PSL Wafer Standard

Contamination Wafer Standards

Particle Wafer Standards

Cleanroom Fogger, CRF2

LN2 Nitrogen Fogger

PSL Spheres, Polystyrene Latex Beads

Silica Nanoparticles in DIH2O, 15ml or 100ml volume

Smoke Studies to Visualize Airflow and Turbulence

Call Applied Physics, Inc.

1-720-635-3931 or 303-999-6837


CRF4 Cleanroom Fogger supports ISO 14644-3, USP797, Federal Standards 209E, ISO 14644-1 and 14644-2 airflow guidelines.

Cleanroom Fogger, CRF4

Watch CRF4 Video. The CRF4 is a portable cleanroom fogger that can use deionized (DI) water or water for injection (WFI water) to generate 1.25 cubic meters of pure fog per minute at 187 ml fog density per minute to provide from 10 to 15 feet visible fog distance. If you are comparing another fogger to the CRF4, how much fog volume and fog density does the other fog generator produce? Do you need airflow visualization in barrier isolaters, RABs or cleanrooms? The CRF4 is designed to tune the fog output to your airflow dynamics, providing up to 10 to 15 feet visible airflow. The CRF4 would be used in smoke studies of semiconductor clean rooms, ISO suites, sterile rooms, bio-safety cabinets, RABs and medical rooms. Airflow guidelines ISO 14644-3, USP 797,  Federal Standards 209E and its replacement ISO Standard 14644-1 and 14644-2 are supported for airflow recovery tests.

Cleanroom Fogger, CRF4 - Request a Quote

Applied Physics provides clean room foggers to visualize airflow turbulence, patterns, velocity, and dead zones during smoke studies. The CRF4 produces almost as much pure fog as ultrapure foggers, which use LN2 and DI water. It includes adjustable airflow, adjustable fog volume and wireless remote control, which is not found on other ultrasonic foggers. 

The advantage of the CRF4 is the fog density generated at 187 ml per minute, which is higher than any other smoke machines in the world. When you look at the different foggers available, it is important to determine how much fog volume the fogger produces? How much fog density is generates? And the typical visual distance of the fog in typical clean room operation. All foggers provided some form of direct control of the fogger, but does the fogger offer wireless remote control of the fogger operation, so that it can be used inside a closed area.

CRF4 Cleanroom Fogger to Visualize Airflow Turbulence in Support of Smoke Studies

CRF4 Cleanroom Fogger - Request a Quote

Watch CRF4 Video. The CRF4 Cleanroom Fogger is the fogger to select when you want higher volumes of fog, but do not want to use liquid nitrogen. The CRF4 produces 1.25 cubic meters of pure fog per minute with 187 ml of fog density per minute providing 10 to 15 feet of visible fog. It is the fog density and fog volume that generates visual fog distance. Most foggers are described without referring to fog volume, fog density and visual airflow distances, showing nice pictures of the fogger without describing fog performance. If the fogger you are considering does not describe its actual fog performance, how do you, as a buyer or user, know if the fog generator can meet your objectives? The CRF4 describes the fog volume, fog density and visible airflow distances, because customers buy smoke machines to achieve a desired level of air flow visualization in their smoke studies. There are a variety of accessories that can be plugged directly to the CRF4 output or attached to the 5 meter fog hose. The performance of fog volume, fog density and visual fog distance are the primary reasons a customer needs a fogger.

CRF4 Cleanroom Fogger - Request a Quote

Watch CRF4 Video. Some ultrasonic foggers are provided with a stainless steel enclosure, and look beautiful, but generate very little fog. Many foggers do not describe how much fog volume or fog density provided. Few foggers describe the visual airflow distance provided. The CRF4 is specifically designed to provide 1.5 cubic meters of fog per minute, as compared to similar priced foggers with only 20% of the fog volume. The CRF4 airflow can be adjusted. The fog volume can be increased and decreased as needed for small volume clean areas, or larger volume clean areas. It can be operated directly by using touch pad controls on the CRF4, or it can be operated remotely for use inside a closed room, RAB, bio safety cabinet, etc.

The CRF4 Fogger is designed to produce nearly as much fog as competitive LN2 foggers using liquid nitrogen and de-ionized water, but the CRF4 uses only deionized water or WFI water.
Touch Pad Control is provided with the CRF4 as well as Wireless Remote Control; allowing direct control by the operator or remote control of the CRF4 inside a barrier isolator or closed clean room.
9 Accessories are available, such as CRF4 Carry Case, Accessory Carry Case, 5 Meter x 80mm Fog Hose, Y Adaptor, T Adaptor, 1.3 Meter Fog Wand, High Contrast LED Fog Light, 250mm Fog Nozzle. 

The Technology of Generating a Pure Fog for Aiflow Visualization

CRF4 uses 35 ultrasonic piezo devices to generate a pure fog of 1.25 cubic meters / minute with 187 ml of fog density for 10-15 feet of visible fog.

There are a variety of methods to generate a fog used to visualize airflow and turbulence in clean rooms. LN2 can be combined with DI water to produce a very dense ultrapure fog. CO2 Ice can be used to produce a CO2 based fog as well; but the generated fog is lower volume and the volume of CO2 fog output will decrease as the CO2 ice evaporates. Glycol can be used to produce fog, but glycol foggers would not normally be used in a clean room, sterile room or ISO suite due to glycol film left on walls. Ultrasonic fog is the more consistent method with lower cost to produce higher volumes of fog. The CRF4 ultrasonic fog generator is less expensive, lighter weight than LN2 foggers and provides control of fog volume, control of fog density and offers wireless remote control to control the CRF4 clean room fogger inside a closed room or a barrier isolator.

CRF4 Cleanroom Fogger
The CRF4 can be turned on or off at will, and refilled with DI Water or WFI Water as needed. The fog volume can be adjusted higher to 1.25 cubic meters fog / minute or lowered to 0.5 cubic meters fog per minute to fit your clean room air flow dynamics. Adjust the airflow from 25% to 100% air flow velocity.

In order to create larger volumes of fog, 35 ultrasonic devices are used, which vibrate at high frequencies, generating high volumes of vapor droplets at a diameter of 5 to 8 microns. The fog vapor is suspended just above the water line, and then captured by the internal airflow and directed outside the fogger into the clean room or clean area. Attach a Y Adaptor to direct two fof flows upwards into the clean room. Or attach a 5 meter fog hose to direct fog as needed. The Y Adaptor can also be plugged into the tip of the 5 meter fog hose.

If the airflow needs to be adjusted, simply touch the up arrow for increased airflow to match your clean room airflow. Or touch the down arrow to decrease the airflow.

If fog volume needs to increase or decrease, go into mode control and adjust from 25% fog volume to 100% fog volume during operation.