1. Pipe Booster Pump Flow Switch Carries Out on-off Control Over Sensing Elementsthrough a Water Flow Type Magnetic Control Device, Thus Achieving the Effects ofStarting and Shutting Down Water Pumps.2. This water Flow Switch is to Protect the Laser Tube. When the Water Pump is notWorking, the Water Sensor will Detective, and Shut Down the Laser Machine. So theLaser Tube will not be broken. 3. lt can be used together with a Water Pump, instead of a Chiller. (Support door to door service)