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Trim-to-size Paddle Type Switches for ‘flow/no Flow’ Detection for Piping Systems 11/4 and Up

Item# FSW-21

Trim-to-size Paddle Type Switches for ‘flow/no Flow’ Detection for Piping Systems 11/4 and Up Trim-to-size Paddle Type Switches for ‘flow/no Flow’ Detection for Piping Systems 11/4 and Up
FSW-20 series paddle-type switches easily install into pipes ranging in size from 1¼" on up using an ordinary pipe tee or threaded weld coupling. The paddle pivots to move out of the liquid’s path with increasing flow, thereby activating the switch. The paddle is easily cut for field installation for desired flow setting. Models FSW-21 and FSW-22 feature high pressure (2000 psig max.) and high temperature (to 150°C (300°F)) ratings for rugged installations.
FSW-21
  • Easy to Install
  • Switch Acts Bi-directionally
  • Minimum Flow Restriction
  • Less Than 3 psig Pressure Drop
  • Low Cost
  • Reed Relay for Long Life
Connection Size
Body Material
Switch Type
Compatible Media
Pipe Size
Wire Length
 This item is available for quick shipping
See All Options
Quantity Price each
1-9 $233.00
10-24 $221.35
25-49 $216.69
50-99 $207.37
100-199 $202.71
200+ $198.05

In stock

Lead Time ( If not in Stock): 4 weeks

Product Specs

  • Maximum Operating Temperature 148.9 {C} (300 {F})
  • Maximum Pressure 2000 psig
  • Maximum Switching Voltage 20 VA
  • Minimum Operating Temperature -34.4 {C} (-30 {F})
  • Termination Wire Gauge 18 AWG

FSW-20 series paddle-type switches easily install into pipes ranging in size from 1¼" on up using an ordinary pipe tee or threaded weld coupling. The paddle pivots to move out of the liquid’s path with increasing flow, thereby activating the switch. The paddle is easily cut for field installation for desired flow setting. Models FSW-21 and FSW-22 feature high pressure (2000 psig max.) and high temperature (to 150°C (300°F)) ratings for rugged installations.

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