A. Fornaro et al., LOW-COST AUTOMATED RAIN COLLECTOR AND ITS APPLICATION TO THE STUDY OFWET ONLY DEPOSITION IN SAO-PAULO (BRAZIL), Atmospheric environment. Part B, Urban atmosphere, 27(3), 1993, pp. 307-312
An automatic rain collector was developed with emphasis on simplicity,
construction with readily available low-cost materials, inexpensive m
aintenance and reliable operation at temperatures above freezing point
. The rain sensor is of the heated AC conductometric type and the circ
uit includes electronic protections against false triggering by electr
ical transients. With this collector, the first studies of chemical ch
aracterization of wet only deposition were made in Sao Paulo over the
period of November 1988 to June 1990. Results are presented and compar
ed with previous total deposition studies. For this period the volume-
weighted mean values of the pH and conductivity were 4.6 and 19 mu S c
m(-1), respectively.