"Jonathan Stott" wrote in message
...
Keith (Southend) wrote:

That thought has crossed my mind, but the Davis ones tip every 0.2mm, so
it's probably not such an issue. In fact quite often a heavy due can
produce 0.2mm some mornings.

Obviously a tipping gauge will always under-read the precipitation - I
guess more so when the rain is heavier. Where does the water that's
draining through the funnel go while the buckets are tipping?


From 1979-2000 I used a standard rain gauge to measure rainfall. From 2001 I
began using a Davis AWS as well and noticed discrepancies with the standard
rain gauge readings-instruments next to one another by the way. After
raising this problem on USW and tweaking as advised the readings fell more
into line. However this success only applies to the gentle and occasional
Essex rain for once the rainfall intensity increases the two readings drift
apart with the AWS under reading by about 10%. Now I refer to both gauges
and adjust the Weatherlink database as and when.

Incidentally this problem of under reading has occurred on all 3 Davis rain
gauges I have used over the years

All the best


--
George in Epping, West Essex (107m asl)
www.eppingweather.co.uk
www.winter1947.co.uk