Explanation of the criteria for classification and numbering of components      C30.3.04
(JUN 00)
Explanation of the dates on the component's description



1.   Purpose and objectives

     To measure and record the amount and the intensity of rainfall.

2.   Description

     This recording rain gauge utilizes a tipping bucket-type rainfall detector and a mechanical pen recorder suitable for long-term (3 months) operation at sites without line electricity supplies, such as in mountain regions. Every 3 months it is necessary to change the roll chart and the dry cell battery for the chart feed crystal clock.

     The rainfall receiver has a 200mm diameter and bucket capacity 0.5mm or 1mm. It is accurate to within 3% for intensities of less than 100mm/h.

3.   Input

     Actual rain.

4.   Output

     Recorded chart.

5.   Operational requirements and restrictions

     For the installation site of the instrument, a location should be selected where there are no surrounding obstacles such as large trees, buildings, and ground surface is flat.

6.   Form of presentation

     A catalogue and instrument specifications are available.

7.   Operational experience

     About 30 sets were installed in Japan in 1999.

8.   Originator and technical support

     Yokogawa Denshikiki Co.,Ltd.

9.   Availability

     From the HOMS National Reference Centre for Japan.

10.  Conditions on use

     Hardware is for sale.


(First entered: 01 FEB 93 

Last updated: 21 APR 00)