Reviving an old thread.
Bought the new Davis spoon tipper back in March. I had installed a Rainwise but it developed communication issues so I got rid of it. I was waiting for a heavy rain event to see how it compared to the coco which is mounted at the same height about 8 inches away. Leading up to that the new Davis was pretty close for moderate rain. Here is the comparison for the month of May for the days I received rain.
Davis .08 Coco .08
Davis .21 Coco .22
Davis .42 Coco .40
Davis .61 Coco.57
Davis .36 Coco.35
Davis 2.21 Coco 2.09 Rain Rate 9 inches
Davis .05 Coco .05
Davis 2.17 Coco 2.07 Rain Rate 8.86 inches
The 2.21 rain event had several minutes of horizontal rain as it was very windy.
The 2.17 event was a downpour with no wind.
Overall I'm happy. The old Davis would vastly under report in heavy rain. While the bias is to over report I am reluctant to make any adjustments. I know people in this thread have had issues. This bucket was bought in March. Maybe Davis did some adjustments to address that.
I went back into an old thread about the tipping spoon when I first installed mine in the summer of 2020, and posted my results. This was July 22-26 2020 on the Mississippi Coast on the wet side of Tropical Storm Hanna, and my results from back then basically mirror yours now. So maybe Davis did actually address the rainfall issue. I also have a rainwise rain gauge wired to work with the VP2, but I have been so satisfied with the results over the last few years I haven't swapped it out.
7/22 VP2 0.83" Coco 0.81"
7/23 VP2 0.20" Coco 0.18"
7/24 VP2 1.51" Coco 1.48"
7/25 VP2 2.22" Coco 2.16" (rain rate 9.00/hr)
7/26 VP2 0.71" Coco 0.68"