Universal rain gauge
From AMS Glossary
universal rain gauge
A weighing rain gauge in which the weight of the catch is converted to centimeters or inches of precipitation and recorded by pen on a clock-driven chart.
The clock cylinder usually rotates one revolution in 24 hours.
NOAA/National Weather Service 1972. National Weather Service Observing Handbook No. 2, Substation Observations. NOAA, US GPO..