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