Recording raingauges are used to obtain a continuous record of daily or weekly rainfall. It consists of a funnel-shaped collector at the top of the gauge and a float syphon chamber and recording mechanism just below it. the rain water collected by the collector is led into the float chamber. The float is having a central stem on which a pen assembly is fixed. The pen is moving over a daily (or weekly) chart wound over a clock drum. After every one centimetre of rainfall syphoning occurs and recording of rain starts afresh.
