Tipping bucket rain gauge for your home or farm weather station
thingiverse
Automatically measuring rainfall is tricky. This uses the trusted method of counting the number of times the bucket tips. The rain fills the uppermost half, which then overbalances and presents the other half. Other designs were too light and surface tension causes the system to stop. The parts are designed to fit into a short (~180mm) length of 110mm PVC pipe. Obviously the funnel goes at the top, and the tipping bucket assembly at the bottom. Use stainless steel or brass for the shafts, and place the magnet into the 6mm hole in the centre of the bucket. A reed switch or Hall effect device may be used to get the pulses into your station. For best results place the unit outdoors, in direct rainfall.
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