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Last Updates: 15/02/2021

Gems FS-550 Series Flow Switch

From: $355

Flow Setting: 15.0 – 52.0GPM
Body Material: 316 Stainless Steel
Port Size: 1″ NPT Male
Switch Type: SPDT (20VA)

$540

Flow Setting: 15.0 – 52.0GPM
Body Material: Brass
Port Size: 1″ NPT Male
Switch Type: SPDT (20VA)

$355

Flow Setting: 5.0 – 29.0GPM
Body Material: 316 Stainless Steel
Port Size: 1″ NPT Male
Switch Type: SPDT (20VA)

$540

Flow Setting: 5.0 – 29.0GPM
Body Material: Brass
Port Size: 1″ NPT Male
Switch Type: SPDT (20VA)

$355

Flow Setting: 15.0 – 52.0GPM
Body Material: 316 Stainless Steel
Port Size: 1″ NPT Male
Switch Type: SPDT (20VA)

$886

Flow Setting: 15.0 – 52.0GPM
Body Material: Brass
Port Size: 1″ NPT Male
Switch Type: SPDT (20VA)

$585

Flow Setting: 5.0 – 29.0GPM
Body Material: 316 Stainless Steel
Port Size: 1″ NPT Male
Switch Type: SPDT (20VA)

$864

Flow Setting: 5.0 – 29.0GPM
Body Material: Brass
Port Size: 1″ NPT Male
Switch Type: SPDT (20VA)

$585

Standard FS-550 switches sense liquid flow in either direction to monitor flow/no-flow conditions. They are supplied in two paddle lengths. The paddle is trimmed during installation to permit switch actuation at the desired flow rate. As flow increases in a pipe, the paddle of the switch pivots to move out of the liquid path, producing less than 3 psig (.21 bar) of pressure drop regardless of pipe size.  

Using Gems™ Safe-Pak® Relays and Barriers, these switches provide automatic flow / no flow interlock and are intrinsically-safe without explosion-proof housing and piping. 

Applications:  

  • Compressors 
  • Heat Exchangers 
  • Turbines 
  • Engine 
  • Boilers 
  • Chillers 
  • Valves 
  • Pumps 
  • Regulators
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