Gems Sensor & Control FS-150 Series Flow Switch

Last Updated: 25/02/2019

Gems Sensor & Control 129664

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Part Number: 12964 Categories: ,

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Primary Material of ConstructionPlastic
Sensor TypePiston Type
Adjustable RangeN/A
Flow Setting (GPM)4.00
Body MaterialPolypropylene
Port Size1/2″ NPT Male
Switch TypeSPST, N.O. (20VA)
Set Point Accuracy±15%
Maximum Pressure (PSI)150 – 300
Maximum Temperature212
Electrical Termination1/4″ Male Quick Connect Terminals (2)
Set Point Differential20%
Wetted MaterialsPolypropylene, 316 Stainless Steel, Viton, Ryton
ApprovalsUL Recognized, CSA Listed, CE
Recommended Filtration150 micron


These slim, inline switches reduce pressure drop to a minimum. They incorporate a unique, dual-diameter, internal bore and piston configuration to minimize flow constriction. Liquids are able to smoothly pass around the piston and flow through the switch with little pressure loss to the down stream line.