What is the magnification of the viewing window for the Model 3480C Electrospray?
The magnification for a compound microscope is well defined, but for a simple single-lens loupe such as this it is not. Nevertheless, the magnification for loupes is often arbitrarily defined as the ratio of an assumed 250 mm viewing distance to the focal length of the lens. The lens in the viewing port of the 3480C has a focal length of about 25 mm, thus the magnification defined in this way is about 10X. A more reliable way to define the size of objects in the view is to note that the outside capillary diameter is 150 micrometers. Since this is clearly visible, it can be used as a standard against which to judge the size of the liquid cone and other features of the spray tip.
