rain gauge a device for detection of clogging.

摘要

The rain gauge, which can be used in an isolated station comprises a funnel, provided at its lower part of a nozzle (16) of pouring of water at the input of which is deposited and is disposed a filter (14). The rain gauge also comprises a detection device of the clogging of filter, having a source (30) disposed at the input of the funnel, placed so as to illuminate the bottom of the funnel to the - the top of the filter (14) and a sensor (32) of the light which is reflected and diffused by the bottom of the funnel and which has passed through the filter and the nozzle. Said sensor is placed at the - bottom of the nozzle and offset laterally with respect to that - ci. An electronic box (24) is connected to the source (30) to cause the emission by the latter of light pulses at regular time intervals, and detects the output signals of the sensor (32) exceeds a predetermined threshold.