The CRF2 occupies the closest modern category—but it is not just a renamed UF2.
Compare the actual performance, delivery hardware, controls, supportability and protocol impact before calling any model a direct replacement.
Legacy UF2 and current CRF2 profile
| Decision factor | UF2 / Utility Fogger II archival profile | Current Applied Physics CRF2 profile |
|---|---|---|
| Technology | Ultrasonic DI-water fogger | Ultrasonic DI / WFI / sterile-water fogger |
| Ultrasonic elements | Nine transducers | Nine high-performance piezo devices |
| Published output | Conflicting records; cautious range approximately 3–4 CFM | Approximately 0.26 m³/min / 9 CFM |
| Published runtime | Approximately 50–60 minutes | Approximately 50 minutes |
| Water capacity | Approximately 3.7 L / 1 gallon | Approximately 3.75 L |
| Visible distance | Approximately 3 ft in the legacy table | Approximately 6–7 ft in current product material |
| Hose | 2 in., telescoping approximately 28–82 in. | 2.5 in., telescoping approximately 28–82 in. |
| Controls | Dual-speed fan; legacy on/off operation | Current on/off platform with modern accessories and remote-control options |
| Support state | Legacy installed base with revision uncertainty | Active Applied Physics product category |
More fog can increase visibility without forcing the old platform harder
The current CRF2 product material describes roughly 9 CFM—more than double the cautious UF2 archival range—while maintaining a similar water volume and nominal 50-minute operating cycle. That can improve localized visibility and camera capture.
However, the larger hose, output behavior and accessory interface mean the change should be evaluated against the actual hood, isolator, enclosure or room.
Five items can break the “same category” assumption
Footprint and access
Confirm the new unit fits the cart, doorway, pass-through and operating position.
Hose interface
A 2.5-inch current hose may not fit legacy penetration or wand hardware.
Protocol effect
Changed output and visibility may require method updates, retraining and change control.
Electrical setup
The modern power architecture and cable arrangement must fit the facility.
Accessories
Remote controls, cases, curtain wands and hose splits should be selected for the study—not copied from the old package.
Replace the UF2 with the smallest current platform that reliably satisfies the study
Choose the CRF2 when the target remains localized and the higher current output is sufficient. Move to CRF3 or CRF6 when the enclosure, airflow, distance or multi-outlet requirement exceeds the CRF2 category. Evaluate an AP-series LN₂ fogger when purity, density, long-distance visualization or large-area 3D airflow is the governing need.
Practical answers
Does the CRF2 use the same number of transducers as the UF2?
Both are described with nine ultrasonic elements, but transducer count alone does not establish identical output, control, chamber, electronics or fit.
Will a UF2 hose fit the CRF2?
Do not assume it will. Legacy UF2 material describes a 2-inch hose, while current CRF2 material describes a 2.5-inch hose.
Is CRF2 always the right replacement?
No. It is the closest current low-volume ultrasonic category. Larger or more demanding studies may require CRF3, CRF6 or an LN₂ platform.
Define the application before choosing the replacement.
Applied Physics can compare the UF2 condition, room or enclosure, desired visible distance, runtime, water requirements, hose configuration and validation objective before recommending a current ultrasonic or LN₂ platform.
Request a UF2 replacement evaluation