Mechanical paddle flow monitor RHEASREG® SW. This flow sensor is suitable for flow monitoring of liquid and gaseous, non-aggressive media in pipes and in hydraulic systems from 3/4" through 1/2" to 8" in diameter, furthermore as flow control instrument or as water failure protection, e.g. for pumps in oil and cooling circuits, cooling systems, evaporators, compressors, and heat exchangers, with brass or stainless steel bodies.