Meteorological instruments -- Measurement of Precipitation
The ordinary rain-gauge is dedicated for use in manned weather station. The rain-gauge used at the Observatory Headquarters is 203 mm in diameter, which is a requirement for the rain-gauge operating in tropical region. Hourly rainfall observations are made manually.
The rain is collected by the funnel and flow into the collecting can. Rainfall is measured by pouring the collected rain water into a separate measuring cylinder.