The tipping-bucket and weight measuring type precipitation gauge has long been used worldwide for measuring
rainfall. However, the conventional gauge has observation errors and its measurement range is limited by the device's
resolution. In this paper, a new type of precipitation gauge that uses an innovative method by applying a new ultrasonic
flow measuring technique was developed. This is the first time this technique is being used to gauge rainfall. The
prototype was tested in the laboratory designated by the Korea Laboratory Accreditation Scheme (KOLAS). The
rainfall intensity condition was 20~420 mm/H and the Standard Correction System for Precipitation Gauges was used.
Results of the laboratory experiment showed that the proposed gauge has a ± 2% margin of error. Consequently, it was
proven that the proposed gauge is quite accurate and reliable for measuring precipitation.
