McDonnell & Miller FS7-4SE Flow Switch

McDonnell & Miller FS7-4SE 120175 Flow Switch. The Universal design serves the widest variety of large pipe applications, including heating and hydronic systems, air conditioning, refrigeration and process work. Brass with sealed tube construction. The magnetic switching mechanism eliminates need for bellows, Sensitivity adjusting screw makes flow adjustment easy and the paddles can be trimmed to suit application needs.