Direct answer: choose CRF3 for portable, localized or mid-scale ultrasonic airflow visualization when the delivery path is manageable. Choose CRF6 when the study needs higher ultrasonic fog output, dual 80 mm outlet routing or greater visualization coverage. The final decision must account for pressure and hose restrictions.
What both models have in common
CRF3 and CRF6 are water-based ultrasonic fogging systems manufactured by Applied Physics Corporation. They are evaluated for airflow visualization where the facility procedure permits approved water inputs rather than an LN₂ platform.
Where CRF3 fits
CRF3 is positioned as the portable, mid-scale option. It is a strong starting point for localized enclosures, cabinets, barrier systems and smaller controlled-area studies when the fog can be delivered without excessive restriction.
Where CRF6 fits
CRF6 is the higher-output ultrasonic platform and uses dual 80 mm outlets. It is considered when the application needs more fog volume, larger coverage or two distribution paths.
The variables that can reverse the obvious choice
Positive pressure
A positive-pressure space can resist fog introduced from outside. More base-unit output may help, but the delivery design still has to be reviewed.
Hose route
Long hose, small internal diameter, bends, reducers and splitters can reduce delivered fog. Compare models using the proposed route, not open-air output.
Working position
A fogger inside the room or enclosure faces a different requirement than one operating outside with a hose passing through a port.
Desired visual distance
Localized visualization and room-scale visibility are different tasks. Define how far the fog must remain visible and where it will be recorded.
RFQ checklist
- Dimensions of the room or enclosure
- Pressure relationship
- Fogger location
- Hose length, diameter and fittings
- Desired visual distance
- Working-water requirements
- Outlet, remote-control and accessory needs
Selection rule: do not buy CRF6 merely because it is larger, and do not assume CRF3 will perform through an unreviewed restrictive path. Match the model and delivery design to the actual study.
Compare the CRF3 and CRF6 product pages, then submit the setup through the GSE RFQ.
Frequently asked questions
Which is larger-output, CRF3 or CRF6?
CRF6 is the higher-output ultrasonic platform and uses dual 80 mm outlets.
Do both models use water-based ultrasonic fogging?
Yes. Both are ultrasonic platforms; confirm the approved water and current manufacturer instructions for the quoted configuration.
Can hose routing affect the model choice?
Yes. Length, internal diameter, bends, reducers and pressure can reduce delivered fog and should be included in the application review.
Frequently asked questions
Which is larger-output, CRF3 or CRF6?
CRF6 is the higher-output ultrasonic platform and uses dual 80 mm outlets.
Do both models use water-based ultrasonic fogging?
Yes. Both are ultrasonic platforms; confirm the approved water and current manufacturer instructions for the quoted configuration.
Can hose routing affect the model choice?
Yes. Length, internal diameter, bends, reducers and pressure can reduce delivered fog and should be included in the application review.
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