120301 Model FS7-4WL McDonnell Miller Flow Switch

Installation Guide

1 1/4″ NPT, SPDT Snap Switch, Industrial Liquid Flow Switch for up to 300 PSI Max Pressure with Extended Paddle and Paddle Arm and Trimmable Stainless Steel Paddles and NEMA 4X Enclosure (Part Number 120301)

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