Fog volume is a primary requirement for a customer when purchasing a smoke machine. Fog density is usually unknown and not understood, but is the second most important reason for buying a fogger; as density controls the distance the airflow patterns and turbulence will be visible. To calculate fog density, find out the actual fill volume of the fogger and the actual operational time of fog. Ultrasonic foggers use an transducer assembly under water, which when powered generates fog vapor used to visualize airflow turbulence. Fog is also used to locate areas where there is minimal clean room air, called dead spots. Which ultrasonic fogger is the best for the money invested? Are you looking for a low cost cleanroom fogger with a constant fog volume? Or do you need a smoke machine that provides adjustable fog volume, adjustable airflow velocity and offers wireless remote control? The CRF2 fogger uses 3.75 liters and a single high output transducer assembly using 9 piezo devices. Fog density is 57ml per minute, which creates about 9 cubic feet per minute of fog during a typical 50 minutes of operation. The Cleanroom Fogger is a low cost device and typically used in fume hoods, airflow ducts and similar small areas.

Cleanroom Fogger, DI Water producing 0.26 cubic meters of pure fog per minute, 9cfm

	OPTIONAL Carrying Case

Specifications, Cleanroom Fogger

(Details)

Product Model CRF4 Clean Room Fogger CRF2 Cleanroom Fogger Small LN2 Foggers FOG Minutes ~ 45 minutes ~ 50 minutes ~ 20-40 minutes FOG Volume Meters/Min. ~ 1.25 cubic meters / minute ~ 0.26 cubic meters / minute ~ 0.8 to 1.5 cubic meters / minute Total FOG Volume ~ 56.25 cubic meters ~ 13 cubic meters ~ 16 to 60 cubic meters Fog Density (ml/minute) ~ 187 mL / minute ~ 57 mL / minute ~ 150ml to 260 mL / minute Visual Fog Distance ~ 10 to 15 feet ~ 7 to 8 feet ~ 10 to 15 feet Adjustable Fog Volume Yes, thru touchpad and wireless remote control No fog volume control No fog volume control Adjustable Airflow Velocity Yes, thru touchpad and wireless remote control No airflow control No airflow control Fogger Technology Ultrasonic Ultrasonic Ultrapure Liquids Used DI Water, Sterile Water or WFI DI Water, Sterile Water or WFI LN2 + Water (DI, Sterile or WFI) Clean Room Class Class 1 – 10,000 Class 1 – 10,000 Class 1 – 10,000 Compatible Guidelines USP 797 USP 797 USP 797 Compatible Guidelines ISO 14644-3, Annex B7 ISO 14644-3, Annex B7 ISO 14644-3, Annex B7 Compatible Guidelines Federal Standards 209E Federal Standards 209E Federal Standards 209E Compatible Guidelines ISO Standard 14644-1, 14644-2 ISO Standard 14644-1, 14644-2 ISO Standard 14644-1, 14644-2 DI , WFI or Sterile Water Volume 9.5 liters 3.75 liters 1-3 liters LN2 Volume No LN2 used No LN2 used 6-10 liters Operator Control Touchpad control of fog volume & airflow Power Switch, no fog controls Power Switch, no fog controls Remote Control Wireless Remote control of fog volume & airflow Remote Cable Control, 10 feet No Wireless Remote Control of fog Handling Carry Handles (top and front) Carry Handle (top) Carry Handle Enclosure 316L Stainless Steel, electro-polish Polyethylene Stainless Steel Power VAC 120, 220, 100 VAC 120, 220, 100 VAC 120, 220, 100 VAC Full Weight ~ 65 lbs ~ 20 lbs ~ 50-75 lbs Accessories 1-7 Accs 1-3 Accs Several Accs

SMOKE STUDY

The CRF2 smoke generator is used in smoke studies as a smoke generator. It is a low cost device providing excellent volumes of fog in smoke studies. It provides a lower weight using a polypropylene enclosure, as compared to stainless steel enclosures. Operation instructions are located on the right panel, so there is no paper paper manuals used in the pharmaceutical ISO 9 suites, laboratory or clean room.

Theory of Operation: Ultrasonic cavitation and DI water, sterile water or Pharmaceutical WFI Water. Use of any other liquids or chemicals voids the warranty.

The transducer life is ~5,000 hours. To protect the transducers from damage there is a level sensor that will interrupt the input voltage to the transducer module, should the water level drop to a low level. This ensures long life and reliability.

Notes:

1. The fog generated by this device contains microscopic droplets of DI water. AVOID USING IN IMMEDIATE VICINITY OF ELECTRICAL APPLIANCES, WATER SENSITIVE PRODUCTS AND EQUIPMENT.
2. The fan will operate with no water in the reservoir with the power switch in the ON position. This will aid in drying when the chamber is drained.
3. To increase drain plug tension, remove the plug, rotate clockwise (CW) the front latch while holding the rear metal disk.
4. The CRF2 is intended to be used on a flat surface, on its feet. Tipping the fogger with water in the reservoir will damage the fogger. DO NOT OVERFILL OR TIP THE FOGGER.

Which Cleanroom Fogger or Smoke Generator Is Best For Smoke Studies?

AP35 UltraPure Fogger, 5 Cubic Meters per minute for 70 minutes with 20-30 feet visible distance. When ultrapure fog purity with high volume of fog and long visible airflow is needed To visualizing airflow in large cleanrooms, ceiling to floor To fog exit velocity must not create turbulence To needing to do 3D airflow modeling of airflow When needing to do visualize airflow in larger cleanrooms When 70 minutes of high purity fog duration is needed When fog visibility of 20-30 feet distance is required To fog Class 1 to Class 10,000 semiconductor, medical, pharmaceutical cleanrooms AP100 LN2 UltraPure Fogger, 15.5 Cubic Meters fog per minute for 70 minutes with 30-40 feet visible distance. When ultrapure fog is needed to support large cleanrooms Four Fog hoses and two water heaters are provided to disperse 15.5 cubic meters fog per minute High levels of fog density to visualize airflow for 30-40 feet For 3D airflow modeling of ISO suites, sterile rooms, cleanrooms 9 Accessories available to configure the AP100 to your cleanrooms Fog large hallways and large clean areas Fog for longer distances of 30-40 feet Supports ISO 14644-3 and USP 797 airflow guidelines for your smoke study * Use Hand Gloves and Face Shield when filling LN2 Use 16 Megohm DI water or WFI Pharmaceutical Water

Cleanroom Fogger, 9cfm, 50 minutes Operation When budget is lower, basic Fogger OK, minimal output turbulence When 50 minutes of fog duration is useful with quick turnaround When fog visibility for 7-8 feet distance is acceptable When fogging gray areas behind the cleanroom When fogging ≥ Class 10 or above in semiconductor or pharmaceutical cleanrooms CO2 Fogger, Vapor DiH2O Fogger, average 4cfm over 10 minutes When Fogging Hazardous areas, No Electrical Outlet Available When fog visibility for 5-6 feet distance is acceptable When 10 minutes of fog duration is useful When fogging small areas Class 10 or above in semiconductor or pharmaceutical clean rooms When fogging work benches 16 Meg ohm DI water is standard Do not permit DI Water to go stagnant in the chamber ** Use gloves when handling CO2 ice

Fogger Technology

The three types of foggers manufactured for use in cleanrooms, ISO suites and sterile rooms are described below.

Ultrapure LN2 Fogger:
LN2 foggers use liquid nitrogen and DI Water or WFI water, providing the highest fog volume, highest fog density and best level of fog purity
fog. Fog purity is allowing the LN2 to boil, while heating the water. nitrogen and water molecules form and combine at high rates to create a fog vapor. This process removes any bacterial agents and residual particulate matter from the water vapor. The volume of fog produced depends on the version of LN2 fogger purchased. The AP35 Ultrapure Fogger converts 571 ml of water per minute, a high fog density, which generates 5 cubic meters of fog for about 70 minutes to visualize airflow for 20-30 feet. The AP100 LN2 Fogger converts 1520 ml of water per minute, a very high fog density, to produce 15.5 cubic meters of ultrapure fog for about 70 minutes visualizing air flow for about 30-40 feet using 4 fog outputs. The fog is ultrapure leaving minimal, if any, trace particles behind. It evaporates to its gaseous hydrogen, oxygen and nitrogen
components, which are natural to the cleanroom environment. LN2 foggers are used in a Class 1 – 10,000 cleanrooms.

DI Water Fogger: This type of fogger has less fog density (less capability to visualize airflow) than the LN2 ultrapure foggers described above. But a DI Water Fogger has more fog density than the CO2 fogger described below. The DI water fog is generated by cavitation in water, producing a water vapor of 8-10 microns in diameter. If the facility manager operates a class 10 to Class 10000 Clean room, the use of a DI Water Fogger poses no problem. However, Cleanroom Engineers who manage facilities operating at Class 1 to Class 10 performance may desire to use an ultrapure fogger. Although some DI Water foggers are described as ultrapure, but unless the DI water is heated or boiled to remove bacterial agents, the fog is not ultrapure. The 2-3 lb output pressure of a DI water fogger may also distort the airflow patterns. The temperature output is typically less than the surrounding room temperature, thus a fog generated from an ultrasonic fogger will sink momentarily in a typical 70 degree room temperature.

CO2 Fogger:
This type of CO2 Smoke Generator produces an excellent volume of fog during the first minute, then begins to lose fog volume and fog den sity as the CO2 ice evaporates. CO2 fogger is used for low volume, non-process critical applications such as bench airflow testing. The fog is created using CO2 ice as the fogging agent. The fog contains elements of the CO2 and the user must determine if the residual CO2 components are acceptable in a process environment operating Class 100 to Class 10,000. The 2-3 lb output pressure of a CO2 fogger also distorts the airflow patterns, thus adding to the turbulence. The output starts at about 3cfm and slowly decreases to 0 CFM in about 10 – 12 minutes.