The Siphon Rain Gauge (SRG) is an RM Young 50202 heated precipitation gauge with no moving parts. Precipitation collects in the funnel catchment (100cm^2) and drains into a measurement column (20cm^2) where 1mm of precipitation is equal to 5mm of column rise. The level of precipitation in the column is measured by a capacitive sensor that outputs a voltage signal proportional to the amount of precipitation (1V = 10mm). The column drains in 30 seconds, only when the maximum equivalent of 50mm precipitation is reached (therefore, it will consistently read whatever the water level is, compounding when more precipitation is added). Evaporation in the column is negligible.
The SRG is deployed in marine environments where platform instability makes traditional rain gauge installation impractical.
|Description||Rain Rate (mm/hr)||Precipitation (mm)|
The SRG is located at the AMFs.
List of known issues for this instrument that MAY NOT need to be mentioned in your DQA's:
List of past problems for this instrument that DO need to be mentioned in your DQA's:
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