An efficient flow switch from Grainger can accurately monitor the flow of air, steam or liquid, then send a signal to a pump to turn itself on or itself shut off. Liquid flow switches can be used to help regulate systems such as hydronic heating, plumbing, water cooling equipment, liquid transfer, water treatment and more. Airflow switches can be used to help operate cleanroom filter systems, duct type heating, air ventilating and more. Shop Grainger for dependable flow switches!