Self Recording Rain Gauges are manufactured as per IS:5225 :1969.

 

Rain Gauge is manufactured from non corrosive fiber glass reinforced plastic container.

 

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 stud on which a pen assembly is fixed.  The pen is moving over a daily chart wound over a clock drum.  After every 10 mm of rainfall syphoning occurs and recording of rain starts afresh.