Stainless Steel Hellmann Rain Gauge
Posted: Sun Aug 14, 2016 4:07 pm
I'm experiencing a problem with this. Rain droplets are adhering to the funnel, therefore not all rain is dripping into the container, and consequently the amount measured is low, e.g: 3.1mm compared to 3.3mm in a nearby copper Snowdon gauge.
The manufacturer recommended a petroleum based product wiped inside the funnel, however this has not worked.
Suggestions, and an explanation of the physics involved appreciated. This adhesion does not occur in the Snowdon Gauge.
The manufacturer recommended a petroleum based product wiped inside the funnel, however this has not worked.
Suggestions, and an explanation of the physics involved appreciated. This adhesion does not occur in the Snowdon Gauge.