A steady flow of liquid is pumped, via a peristoltic pump, through an adjustable discharge rod and over a second rod which discharges compressed air through a small jet. As the liquid flows over the air jet it is nebulized, the aerosolized agent then exits via the top of the nebulizer. The liquid which fails to nebulize falls to the bottom of the nebulizer and is recovered and can be sent to the supply reservoir where it can be reused.
The liquid dispensing rod can be adjusted to maximize nebulization. Input air pressure is normally maintained between 25 and 30 psi but can be increased at user’s discretion. Higher pressures will result in increased nebulization but will at the same time increase droplet diameter. As the pressure is adjusted the positioning of the liquid dispensing tube must also be adjusted.
| |
10 psi |
20 psi |
30 psi |
40 psi |
| Flow Rate (L/min.) |
10.02 |
15.53 |
20.63 |
25.46 |
| Use Rate (L/min.) |
0.21 |
0.31 |
0.55 |
0.70 |
| Evaporated Water Rate (L/min.) |
0.05 |
0.07 |
0.11 |
0.38 |
| Aerosol Output (μL/L of Air) |
20.96 |
19.66 |
26.43 |
27.57 |
| Particle Droplet Diameter (μm)* |
1.49 |
1.06 |
1.08 |
1.07 |
* Horizontal nebulizer jet orientation
Pump Speed = 250 rpm
Nebulizer Jet = 0.007” x 0.003”
