Maritime Weather and Instrumentation
Precipitation
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Vaisala Rain Detector DRD11A features fast and accurate precipitation
detection (ON/OFF). The sensor operates via droplet detection rather
than by signal level threshold. The capacitive principle utilizes the
RainCap sensor plate.
This instrument uses a tipping-bucket mechanism to produce a contact
closure every time it receives a predetermined small quantity of
rainfall (0.2 mm). The body and funnel of the gauge are of aluminium
alloy.
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