Flow Switches - Popular Models And Common Applications of Flow Switches Flow switches are used to monitor flow of liquid or gas in a pipe. It can be use on various applications such as: Kidney dialysis machines, micro biomedical machines, laser cooling systems and pollution Sampling equipment. in Public bookmarkswith flow_switchindustrial_process_equipmentwater_handling_equipment Note: Flow switches are used to monitor flow of liquid or gas in a pipe. It can be use on various applications such as: Kidney dialysis machines, micro biomedical machines, laser cooling systems and pollution Sampling equipment.