12-04-2016, 11:11
Hi,
I've not actually measured it, but I would not expect "overflowing" to be a significant problem. But with rain drops that dense (or large), I would expect "splash out" to give a considerable reduction in the measurement, since it's a known problem even with lesser rain (due to the low slope and small "walls" of the FO "funnel").
Another issue is the rate of tipping of the "see saw". The Fine Offset sensor/counter (i.e. in its T/H Transmitter) can handle an enormous speed (I don't know about the Weatherduino software) but some of the rainwater measurement will be "lost" whilst the see-saw tips.
Personally, I have experimented with adding a funnel (15 cms, 6 inches diameter) to the FO gauge to increase its sensitivity (by a factor of 2.5) and reduce splash-out. However, my first prototype showed that some form of surface treatment/paint is necessary: An off-the-shelf funnel didn't indicate the onset of rain any sooner (because beads of water collected in the funnel, even with its steeper sides) and now, after a few years, the plastic has "died" due to (UV) exposure, even in the UK.
Cheers, Alan.
I've not actually measured it, but I would not expect "overflowing" to be a significant problem. But with rain drops that dense (or large), I would expect "splash out" to give a considerable reduction in the measurement, since it's a known problem even with lesser rain (due to the low slope and small "walls" of the FO "funnel").
Another issue is the rate of tipping of the "see saw". The Fine Offset sensor/counter (i.e. in its T/H Transmitter) can handle an enormous speed (I don't know about the Weatherduino software) but some of the rainwater measurement will be "lost" whilst the see-saw tips.
Personally, I have experimented with adding a funnel (15 cms, 6 inches diameter) to the FO gauge to increase its sensitivity (by a factor of 2.5) and reduce splash-out. However, my first prototype showed that some form of surface treatment/paint is necessary: An off-the-shelf funnel didn't indicate the onset of rain any sooner (because beads of water collected in the funnel, even with its steeper sides) and now, after a few years, the plastic has "died" due to (UV) exposure, even in the UK.
Cheers, Alan.