The eight-inch in diameter Standard Rain Gauge (SRG) is the standard in precipitation measurement and has been since the 1800s in the United States. The NovaLynx Standard Rain and snow gauge is a National Weather Service type all-aluminum rain gauge with a total capacity of 20″ of rainfall. The gauge has no moving parts. An epoxy laminate measuring stick with English and metric marking is included.
The upper portion of the funnel is cylindrical in shape and is tuned to a fine edge. Rainwater falling into the funnel is delivered into a measuring tube. The ratio of the funnel diameter to that of the tube is 10 to 1, so that 1 inch of rain fills the measuring tube with 10 inches of water. The measuring stick is used to accurately determine (within 0.01″) the amount of water in the measuring tube. Any excess water that overflows the measuring tube is captured in the measuring can.
In winter, the funnel and measuring tube are removed so that rain/sleet/snow are collected by the measuring can only. The amount of precipitation is measured by melting the ice and then pouring the water into the measuring tube. The measuring stick is lowered to the botton of the tube, then lifted out to read the depth. This is done as many times as necessary and the measurements are added together.
The NovaLynx eight-inch standard rain gauge can measure up to two inches in the inner chamber referred to as the receiver. The accuracy of the gage is 0.5 percent of full scale whereas the sensitivity is 0.01 inch.
I also use the Novalynx Standard Rain Gauge for reporting to CoCoRaHS.