I.Technical parameters 1.Function environment: temperature 0-400C,relative humidity≤90%RH,Power supply 220V/50Hz,it can opearte continuously. 2.Storage tank volume:20L, PVC plate welding plate. 3. Flowmeter: rotameter flowmeter, fluid range: 60-600L/H. 4.Experiment tank with organic glass, with weighing device and epxeriment plate（hemisphere sink, sink taper, plain, convex cone）with tube nozzle, inner diameter: about 8mm. 5.Low noise No Rust corrosion of pump, top lift:10m, top fluid:12L/min, rotary speed: 2800r/min,wor power: 90W 6.Experiment fluid—water cycle design. 7. Other: tube, valve, whole structure: stainless material. 8.Dimension:1200×450×1450mm