A bespoke rain gauge
Our high tech, digital rain gauge device finally failed and rather than replace it with another complex 'solution' I decided to construct a more basic, traditional instrument, only on a larger scale. Essentially this is just a funnel that intercepts and collects a given area of rainfall and concentrates it in a narrow tube, magnifying the results for easy measuring.
I purchased a cheap stainless steel funnel with a diameter of 52mm connected to 2 meters of clear plastic tubing with a diameter of 12.5mm.
The ratio of cross-sectional area between the two diameters is 17 so each 1mm of rainfall gathered by the funnel displays as 17mm in the tubing.
The tap at the bottom is required to drain the gauge after each measuring period.
I purchased a cheap stainless steel funnel with a diameter of 52mm connected to 2 meters of clear plastic tubing with a diameter of 12.5mm.
The ratio of cross-sectional area between the two diameters is 17 so each 1mm of rainfall gathered by the funnel displays as 17mm in the tubing.
The tap at the bottom is required to drain the gauge after each measuring period.
August 25, 2019
