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美国C.B.S. Scientific电泳产品 Mini-Peristaltic Pump for Gradient Gel Casting. Variable flow mini-pump, 220V, 50HZ . Variable flow Mini-Pump is a bidirectional, self-priming peristaltic pump for precise low-flow deliveries. The squeezing action of the rollers on the tubing progressively moves fluid through the tubing in advance of the rollers, resulting in a peristaltic pumping action. The flow is proportionate to the speed of the pump head and the inside diameter of the tubing, both of which can be varied. A variable speed flow control and 5 different sized tubing assemblies provide fine resolution with a wide range of flow rates