f. Twelve- Inch Weighing Rain Gage. This gage (manufactured by the Belfort 

 Instrument Company, Baltimore, Maryland) is used to measure and record the 

 daily amount of precipitation (Fig. 25), and is located near the instrument 

 shelter (Fig. 2). The gage sensor consists of a 1-foot-high collection bucket 

 (8 inches in diameter), a weighing mechanism connected to the recorder pen, and 

 a chart drive for continuously recording the amount of precipitation. The 

 weighing device is a spring scale connected through a lever mechanism to a pen 

 that moves across the chart. The rain capacity is expressed in inches but is 

 measured in terms of weight; i.e., 1 inch is 29.02 ounces at 62.56° Celsius. 

 The manufacturer's specifications indicate that the instrument accuracy is 

 to 6 inches ±0.5 percent (±0.03 inch of precipitation) and 6 to 12 inches ±1.0 

 percent (±0.06 inch of precipitation). Daily observations of the total pre- 

 cipitation are recorded and the chart records are retained for future reference. 



Figure. 25. Recording rain gage. 



g. Six-Inch Plastic Rain Gage . The 6-inch rain gage (a True Check Rain 

 Gage manufactured by the Edwards Manufacturing Company, Alberta Tea, Minnesota) 

 (Fig. 26) is located about 25 feet from the 12-inch weighing rain gage (Fig. 2), 

 The gage is simply a catch with a calibrated scale and is used as a check for 

 the 12-inch weighing rain gage. Daily totals are recorded and the gage is man- 

 ually (emptied) reset. 



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