It works good, but i'm looking for a better sensor and more quality (after a few days already suffer oxidation on the PCB board

My goal is to detect rain and get a notification if it's raining and when it stops raining.
I have found this (Kemo M152 rain sensor), but have not yet found anything to use with Arduino or a raspberry.
A Davis 6420 Leaf Wetness Sensor could be also an solution, if it's possible to use as a rain detector.
Supply Voltage and Current . . . . . 100 μA (typical) @ 3 VDC
Output . . . . . . . . . . . . . . . 2.5 to 3 VDC
Connections
Yellow . . . . . . . . . . . . . . . 3 VDC
Red . . . . . . . . . . . .. . . . . Ground
Green . . . . . . . . . . .. . . . . Output
Some one build a rain detector?