The Rain Gauge by Hellmann is an automatically recording device to measure the quantity of rain and it is provided with a recording drum.
Hellmann rain gauge consisting tunnel, protective housing with rain cover, built-in measuring vessel with float and syphoning device. Recording on a clockwork driven drum; nominal recording period 7 days; recording height 80 mm, recording chart width for 10 mm rain devided into 1/10 mm.
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