You want to be informed as soon as it starts to rain and your (roof) windows are still open? Or you want to control your garden watering intelligently and also take into account the amount of precipitation? With the POPP Z-Rain this is possible in your Z-Wave Smart Home.
The Z-Rain has a small rocker inside on which the rainwater collects until the weight of the water causes the rocker to tilt. The tipping events are registered and counted by a reed sensor to determine the amount of rainfall. Already after the first tipping process, and thus immediately after the start of the rain shower, the Z-Rain reports the first (cumulative) value to the Z-Wave Smart Home control panel.