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FS251

FS251
Liquid flow switch, paddle, NEMA-1, FS250 Series
manufacturerName :
McDonnell and Miller
Specials Description :
Liquid flow switch, paddle, NEMA-1, FS250 Series
Maximum Pressure (Psi) :
160
longDescription :

The F261 Series Flow Switches respond to fluid flow in lines carrying water, ethylene glycol, or other nonhazardous fluids. These models also work in applications with swimming pool water and lubricating oils.

  • SPDT switches
  • Type 3R (NEMA) or Type 4 (NEMA) polycarbonate enclosure provides dust protection in indoor and outdoor applications.
  • Viton® diaphragm allows use in fluid lines carrying chlorinated water, treated water, or other nonhazardous fluids.
  • Maximum fluid pressure: 290 psig
  • Maximum fluid temperature: 250°F
  • Minimum fluid temperature: -20°F


  • For starting or stopping electrically operated equipment such as signal lights, alarms, motors, automatic burners, metering devices, and others
  • 1" NPT
  • Sensitivity adjusting screw makes flow adjustment easy
  • Single pole, double throw snap switch; 3.7 FLA 240V
  • Four stainless steel paddles included: 1", 2", 3", and 6"
  • Maximum pressure: 160 psi
SKU :
FS251
Branch Pickup Only :
No
Specials :
No
Weight :
1.6 lb
Description :
Flow Switch, NEMA-1 Case
Web Description :
Liquid flow switch, paddle, NEMA-1, FS250 Series
Vendor Name:
McDonnell and Miller
Sort :
2.0
manufacturerSKU :
120611
LogoImage :
L/Logo_mcdonnell.jpg
URI Part Number:
FS251
Vendor Part Number:
120611
Length (In.):
8.50
Width (In.):
4.10
Height (In.):
3.60
Shipping Weight (Lbs):
1.60
Weight (Lbs):
1.60

The F261 Series Flow Switches respond to fluid flow in lines carrying water, ethylene glycol, or other nonhazardous fluids. These models also work in applications with swimming pool water and lubricating oils.

  • SPDT switches
  • Type 3R (NEMA) or Type 4 (NEMA) polycarbonate enclosure provides dust protection in indoor and outdoor applications.
  • Viton® diaphragm allows use in fluid lines carrying chlorinated water, treated water, or other nonhazardous fluids.
  • Maximum fluid pressure: 290 psig
  • Maximum fluid temperature: 250°F
  • Minimum fluid temperature: -20°F


  • For starting or stopping electrically operated equipment such as signal lights, alarms, motors, automatic burners, metering devices, and others
  • 1" NPT
  • Sensitivity adjusting screw makes flow adjustment easy
  • Single pole, double throw snap switch; 3.7 FLA 240V
  • Four stainless steel paddles included: 1", 2", 3", and 6"
  • Maximum pressure: 160 psi
Substitutes