Can these flow switches be mounted at any angle?

Yes, these piston switches use a small, strong spring that is unaffected by the mounting orientation and will work in any orientation.

How to clean Gems FS-380 Series flow switches?

You can clean them by flushing the flow switches with clean water.

Does fluid viscosity affect the set points?

Yes, as viscosity increases, set points decrease.

What does an SPST switch mean?

SPST (single pole single throw) switches are only wired in one direction, either normally open or normally closed. They ensure that these switches can only be wired in one direction.

What is the difference between flow switches and flow sensors?

A flow switch detects flow presence at a predetermined set point. A flow sensor is used to monitor the flow rate and inform the user of the flow rate.

Why is filtration required for using flow switches?

Filtration prevents solid particle clogging. Although it is recommended, many applications do not use them. A general rule of thumb is that the lower the set point, the more susceptible the unit is to particles.

Will adding a small diameter connector to my flow switch change the pressure drop?

The pressure drop across the flow switch will not increase, but a pressure drop across the connector itself may occur. Each flow fitting has a pressure drop.

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GEMS SENSORS FS-380 Series Flow Switch

Gems Sensors FS-380 Series flow switches detect changes in flow rates and trigger specific actions or alarms when preset thresholds are exceeded or not met. They are effective in the manufacturing, ...Read More

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Connection Size: 3/8 MNPT , Switch Type: SPST, NO , Type: Piston

Style	Model	Body Material	Contact Rating	Flow Rate	Material	Max. Ambient Temp.	Max. Fluid Temp.	Max. Pressure	Price
A	FS-380 178353	Brass	20VA	2 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£283.79
A	FS-380 181130	Brass	20VA	0.15 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£258.29
A	FS-380 168435	Brass	20VA	1.5 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£269.13
A	FS-380 168434	Brass	20VA	1 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£266.38
A	FS-380 168433	Brass	20VA	0.5 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£256.10
A	FS-380 168432	Brass	20VA	0.25 gpm	Brass, PPS Composite, Epoxy, SS, Fluorocarbon	275 F	275 F	1500 psi	£272.75
B	FS-380P 197081	Polypropylene	10VA	0.25 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£123.58
B	FS-380P 197082	Polypropylene	10VA	0.5 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£120.88
B	FS-380P 197085	Polypropylene	10VA	2 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£128.10
B	FS-380P 197083	Polypropylene	10VA	1 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£128.27
B	FS-380P 209876	Polypropylene	10VA	0.15 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£121.42
B	FS-380P 197084	Polypropylene	10VA	1.5 gpm	Polypropylene, PPS Composite, SS, Fluorocarbon	212 F	212 F	125 psi	£123.58
C	FS-380 179995	Stainless Steel	20VA	1.5 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£659.99
C	FS-380 179994	Stainless Steel	20VA	1 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£492.00
C	FS-380 193482	Stainless Steel	20VA	0.15 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£624.78
C	FS-380 179992	Stainless Steel	20VA	0.25 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£624.78
C	FS-380 179993	Stainless Steel	20VA	0.5 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£497.10
C	FS-380 179996	Stainless Steel	20VA	2 gpm	SS, PPS Composite, Epoxy, Fluorocarbon	275 F	275 F	1500 psi	£616.79

Working Mechanism

Flow switches consist of a housing with an inlet and outlet for the fluid to pass through.
Inside the housing, there's a mechanism like a paddle or a magnetic float.
When fluid flows through the switch, it exerts force on this mechanism.
If the flow rate falls below or exceeds a preset threshold, the mechanism moves.
This movement triggers a switch or sensor, which can either complete or break an electrical circuit.
This change in the electrical circuit status can be used to signal an alarm, shut down equipment or activate other control actions.

Features

Gems FS-380 Series flow switches require a 100-micron filtration and are less prone to clogging than other high-pressure inline flow switches.
They have one-piece PPS composite pistons that make them ideal for flows up to 2 GPM.
These flow switches are made of brass / polypropylene / stainless steel to resist corrosion.
These Gems Sensors SPST switches require standard 22 AWG polymeric leads for secure electrical connection.

Standards and Approvals

CE
UL
RoHS
CSA