Basic Weather Station
The simplest weather station for ET calculation includes a rain gauge and a temperature sensor. This provides a simple inexpensive way to improve the efficiency of your irrigation.
As with the full weather station, programs can be selectively included or excluded from being controlled by the ET values.
The weather station can prevent irrigation for many days if there has been a period of high rainfall. Irrigation will be halted until the accumulated ET value over many days is equal to the rain fall count.