ULTRASONIC NOZZLE
Focused Nozzle
A MicroSpray Focused Ultrasonic nozzle utilizes a precision-engineered focusing attachment that compresses the naturally divergent spray plume into a tightly focused stream. By introducing a coaxial sheath of gas or air, the droplet plume is narrowed to a focal point as small as 1/8 inch (3.2 mm) in diameter. This aerodynamic focusing — ultrasonic spray shaping in its most precise form — enhances spray control, enabling pinpoint fluid deposition on microscale or geometrically complex targets. After passing the focal zone, the spray begins to diverge — at 10 inches (25.4 cm) from the nozzle tip, the plume expands to a ~3-inch (7.6 cm) diameter spray cone, offering both precision and flexibility in downstream coverage.
How This Ultrasonic Spray Nozzle Works
The focused nozzle uses a coaxial sheath of gas to compress the ultrasonic spray plume into a tight focal point of approximately 1/8 inch (3.2 mm). A high-frequency ultrasonic transducer atomizes the liquid into fine droplets, while the air-shaping shroud directs and confines the spray to a precise target area. Adjustments in gas pressure, nozzle frequency, and fluid properties allow tuning of focal point sharpness and location. The coaxial gas sheath limits dispersion and maximizes transfer efficiency, ensuring consistent film thickness and edge definition even on small features. After passing the focal zone, the spray begins to diverge to a ~3-inch (7.6 cm) diameter spray cone at 10 inches downstream.
Nozzle Frequency
60 kHz or 120 kHz
Focus Diameter
∼1/8 inch (3.2 mm)
Post-Focus Spread
∼3 inches (7.6 cm) at 10″ downstream
Droplet Size Range
10–40 µm depending on frequency
Compatible Fluids
< 10 cP; water, alcohol, polymer solutions
Air Sheath Pressure
0.1–2.0 bar (adjustable)
Spray Pattern Type
Narrow-focus conical with divergent tail
Key Features
Focused Deposition
Produces a tight focal diameter (∼1/8″ or 3.2 mm) for microscale targeting.
High Coating Uniformity
Ensures consistent film thickness and edge definition, even on small features.
Minimal Overspray
Coaxial gas sheath limits dispersion and maximizes transfer efficiency.
Controllable Focal Geometry
Adjustments in gas pressure, nozzle frequency, and fluid properties allow tuning of focal point sharpness and location.
Broad Fluid Compatibility
Works with low-viscosity (<10 cP) solutions, including solvents, polymers, biofluids, and nanoparticle suspensions.
Key Advantages
- Medical device coating: lubricant, drug-eluting, and hydrophilic coatings on needles, stents, and catheters
- Microelectronics fabrication: targeted application of photoresists, dielectric coatings, and fluxes
- Catalyst and energy systems: focused deposition of catalytic materials into microreactor beds or PEM fuel cell electrodes
- Diagnostic aerosol delivery: precise aerosol injection into microfluidic channels, lateral flow devices, or biosensor interfaces
Product Demos
Focused Nozzle Tip — Water Atomization
Focused nozzle tip atomizing water at 0.5 mL/min, demonstrating the fine droplet stream from the precision-engineered tip.
Focused Spray Demonstration
Focused nozzle producing a tightly concentrated spray plume, showing the coaxial gas sheath in action.