The 1W single stage eddy current pumps is for attracts delivers the clear water and the physico-chemical properties is similar warm to the water using of liquid, the use fluid does not have to surpass 80 ℃, commonly used to boiler for water necessary, in the shipbuilding, lightly spins, chemical, the metallurgy, the machine manufacture, the aquaculture, the fixed fire constant voltage, the heat change unit, the agricultural long-distance spray irrigation and so on various industries and agricultures department all has the widespread application.