1-1
CHAPTER 1
Product Overview
This chapter introduces the Model 3076 Constant Output Atomizer,
gives a list of features, and provides a brief operating description of
the instrument.
Introduction
The Model 3076 Constant Output Atomizer, shown in Figure 1-1,
generates submicrometer aerosols that can atomize most solutions
or suspensions.
The conventional mode of operation for the Model 3076 Atomizer is
the recirculation mode. The atomizer can be modified to work in
nonrecirculation mode if necessary.
The number median diameter of the droplets the Atomizer
generates is about 0.3 micrometer and the geometric standard
deviation is less than 2.0. The mean particle size of the generated
aerosol can be varied between 0.02 and 0.3 micrometer by
atomizing a solution and evaporating the solvent.
A common problem of conventional recirculation mode is that the
solvent gradually evaporates in the Atomizer, causing the solution
that remains in the reservoir bottle to become more concentrated
and thus yield larger aerosol particles. A significant increase in
particle size occurs within several minutes when using volatile
solvents such as alcohol. Running the atomizer in nonrecirculation
mode eliminates this problem by preventing the recirculation of the
solution. Either an extra reservoir bottle or a syringe pump is
required to set up the nonrecirculation mode.
Tight tolerances are maintained for all critical dimensions of the
Atomizer to ensure the accuracy of its output particle size. The
characteristics of typical aerosols are included in this manual for
reference.
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