This water sensor is an easy to use moisture sensor module.
Under normal circumstances, that the module does not touch the water line bare or conductive objects, pick up the signal pin module 1M ohm pull-up resistor, the level is high.
When the module is exposed wiring or rain droplets encounter when that becomes low, it is easy to connect to the SCM system project, can be used to detect rain, the water level detection.
Rainwater can be used to detect water level detection.
4 M2 screws positioning holes for easy installation.

Specification