Referred to the schematic circuit diagrams of foreign products, a HLY-01 model of automatic bucket flow gauge was developed. This flow gauge is composed of the collecting flow unit and the signal output unit and coupled with a microcomputor and a multipoint recorder, The gauge can be used for automatic measurement and record of flow discharge at a far distance and run well in a long time. The capacity of measurement is at 3 litres per minute. The accuracy of flow discharge is within 500cc±5%.