Sensitive paper has long been used to detect droplet impingement in several processes including drift measurement. Identifying, counting, and measure the individual droplets has been a tedious, labor-intensive task involving the microscopic examination and statistical extrapolation, seeing as counting all the droplets has previously been impractical. Digital techniques now in common use, however, can reduce this previously labor-intensive task to a rather simple one of graphical data screening. Furthermore, all the droplets are included in the statistical sampling, reducing the uncertainty of the results. The conventional (manual/optical) and digital methods are compared for actual samples as well as the effort and equipment involved.

09-24: A Digital Method for Analyzing Droplets on Sensitive Paper