120261 Model FS7-4WJ McDonnell Miller Flow Switch

Installation Guide

1 1/4″ BSPT, SPDT Snap Switch, Industrial Liquid Flow Switch for up to 300 PSI Max Pressure with Trimmable Stainless Steel Paddles and NEMA 4X Enclosure (Part Number 120261)

Features and Benefits

• For applications requiring a water-tight, dust-tight or a NEMA 4X rated flow switch 11⁄4″ NPT
• Brass with sealed tube construction
• Single pole, double throw snap switch
• Magnetic switching mechanism eliminates need for bellows
• Sensitivity adjusting screw makes flow adjustment easy
• Paddles can be trimmed to suit application needs
• Optional features
  • – Extended paddle arm
  • – Stainless steel body and paddles
  • – BSPT threads
• Minimum temperature (fluid or ambient) -65°F (-54°C)
• Maximum temperature 300°F (149°C)
• Maximum operating pressure
  • 300 psi (21 kg/cm2)
  • 1000 psi (70 kg/cm2) – Stainless Steel models