The precipitation monitor serves as a signal transmitter to determine the start and end of precipitation, as well as the duration of precipitation periods, as required, for example, in the meteorological service. The precipitation monitor can also be used as a status indicator or signal generator to control downstream safety devices against precipitation, such as windows, ventilation flaps, blinds or awnings.
Precipitation in the form of drizzle, rain, snow, or hail is detected by a light barrier system and triggers a switching signal. A built-in event filter is designed to suppress the triggering of the switching signal for individual events, such as leaves, bird droppings, insects, etc., as much as possible. For this to happen, at least n drop events must occur within 50 seconds. The number of drop events (1...15) can be set using DIP switches on the circuit board.
The main features of the precipitation monitor are:
