Looks like a great gage but my question is always how can it be emptied without taking off the bracket?

The bracket has a slot in the bottom and the gage has a 'peg' that fits in it.. there is an opening at the top also.. so you put the tube IN the top opening and it lines up with the bottom.. when you want to empty it, you just take the tube out from the top and empty it.. very simple.. I have had one for over 20 years.. Give it a try, I am sure you will love it..

What is the outside diameter of the tube?

1.75 inches diameter of the tube. 3.75inches diameter of the green collector top

It doesn't look like it could possibly read accurately since the collection tank is so large. How could it be accurate when most gauges are small?

The large collection opening at the top is consistent with other rain gauges I've seen. The large size makes it easy to read from my patio door, I like it.

I feel slightly stupid asking this but I am not understanding how to read this rain gauge. The mark that is 1 is actually 4 inches.

The top of the rain gauge is wider than the column. This makes the column easier to read. If the '1' mark is actually at 4 inches above the bottom. It means that the area that the collects the rain is 4x the area of the column. I have this gauge and I think it is fairly accurate and works well. It also seems to do fairly well with snow (at least in the spring)

ASIN	B00002N64X
Best Sellers Rank	341,199 in Garden ( See Top 100 in Garden ) 1,817 in Indoor Multi-Insect Control
Customer Reviews	4.7 4.7 out of 5 stars (4,355)
Date First Available	7 Aug. 2012
Item display height	28 inches
Item display length	4 inches
Item display weight	454 g
Item display width	4 inches
Item model number	820-0002
Manufacturer	RUNADI
Part number	8200002
Product Dimensions	10.16 x 10.16 x 66.04 cm; 158.76 g

RUNADI B & L Industries 1990-12 E-Z Read Jumbo Rain-Gauge Outdoor, Home, Garden, Supply, Maintenance

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Common Questions