CSA-US Certified Flow Switches

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20 Products

High-Pressure Flow Switches for Oil

Measure the flow rate of oil at pressures up to 3,600 psi to activate or deactivate equipment. Designed to compensate for viscosity and density changes, these switches have an adjustment screw to select your specific flow rate within the set point range. As flowing liquid pushes an internal piston, the switch reads the position of the piston to measure the flow. When the piston passes the set point, the switch actuates. These switches are single pole, double throw (SPDT) and can turn one device from off to on (normally open) or from on to off (normally closed). Their IP65 rating protects them from dust and low-pressure washdowns, such as from a garden hose. All are accurate in any mounting orientation.

These switches are calibrated with and measure oil accurately. They can also be used with other liquids by applying your liquid’s specific-gravity conversion factor to calculate the new set point.

For technical drawings and 3-D models, click on a part number.

SPDT
Pipe Connections	Set Point, gpm	Approximate Difference Between Setpoint and Reset Point	Max. Pressure	Max. Temp., °F	Max. Switching Current	Port-to-Port Lg.	Environmental Rating		Each
Brass Body with Brass Fittings
1/4 NPT Female	0.03 to 0.12	Adjustable	3600 psi @ 70° F	212°	1 A @ 100 V AC 0.42 A @ 240 V AC 1 A @ 60 V DC 0.26 A @ 230 V DC	6 3/8"	IP65	0000000	0000000
1/4 NPT Female	0.05 to 0.3	Adjustable	3600 psi @ 70° F	212°	1 A @ 100 V AC 0.42 A @ 240 V AC 1 A @ 60 V DC 0.26 A @ 230 V DC	6 3/8"	IP65	0000000	000000
1/4 NPT Female	0.2 to 0.9	Adjustable	3600 psi @ 70° F	212°	1 A @ 100 V AC 0.42 A @ 240 V AC 1 A @ 60 V DC 0.26 A @ 230 V DC	6 3/8"	IP65	0000000	000000
1/4 NPT Female	0.5 to 2.5	Adjustable	3600 psi @ 70° F	212°	1 A @ 100 V AC 0.42 A @ 240 V AC 1 A @ 60 V DC 0.26 A @ 230 V DC	6 3/8"	IP65	0000000	000000
1/2 NPT Female	1.5 to 5	Adjustable	3600 psi @ 70° F	212°	1 A @ 100 V AC 0.42 A @ 240 V AC 1 A @ 60 V DC 0.26 A @ 230 V DC	6 3/8"	IP65	0000000	000000
3/4 NPT Female	1 to 11	Adjustable	3600 psi @ 70° F	212°	1 A @ 100 V AC 0.42 A @ 240 V AC 1 A @ 60 V DC 0.26 A @ 230 V DC	6 3/8"	IP65	0000000	000000
3/4 NPT Female	2 to 18	Adjustable	3600 psi @ 70° F	212°	1 A @ 100 V AC 0.42 A @ 240 V AC 1 A @ 60 V DC 0.26 A @ 230 V DC	6 3/8"	IP65	0000000	000000
1 NPT Female	2 to 20	Adjustable	3600 psi @ 70° F	212°	1 A @ 100 V AC 0.42 A @ 240 V AC 1 A @ 60 V DC 0.26 A @ 230 V DC	7 5/16"	IP65	0000000	000000

High-Pressure Flow Switches

Rated for pressures up to 3,600 psi, these switches measure the flow rate of liquids to activate or deactivate equipment when your flow rate reaches a set point. Tighten or loosen the adjustment screw on these switches to choose your flow rate anywhere within set point the range. As flowing liquid pushes an internal piston, the switch reads the position of the piston to measure the flow. When the piston passes the set point, the switch actuates. These switches are single pole, double throw (SPDT) and can turn one device from off to on (normally open) or from on to off (normally closed). They must be mounted horizontally to function correctly. IP rated, they seal out dust and can be lightly rinsed.

These switches are calibrated with and measure water accurately. They can also be used with other liquids by applying your liquid’s specific-gravity conversion factor to calculate the new set point.

For technical drawings and 3-D models, click on a part number.

SPDT
Pipe Connections	Set Point, gpm	Approximate Difference Between Setpoint and Reset Point	Body Material	Max. Pressure	Max. Temp., °F	Max. Switching Current	Port-to-Port Lg.	Environmental Rating		Each
Brass Body with 304 Stainless Steel Fittings
1/4 NPT Female	0.06 to 0.8	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	1.5 A @ 240 V AC	5 3/16"	IP65	0000000	0000000
1/4 NPT Female	0.25 to 2.6	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	1.5 A @ 240 V AC	5 3/16"	IP65	0000000	000000
1/4 NPT Female	0.3 to 6	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	1.5 A @ 240 V AC	5 3/16"	IP65	0000000	000000
1/2 NPT Female	1 to 8	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	1.5 A @ 240 V AC	5 3/16"	IP65	0000000	000000
1/2 NPT Female	2 to 10	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	1.5 A @ 240 V AC	5 7/8"	IP65	0000000	000000
3/4 NPT Female	8 to 34	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	1.5 A @ 240 V AC	5 7/8"	IP65	0000000	000000

High-Pressure Flow Switches for Gases

Good for compressed-air systems and other compressed gases that reach up to 3,600 psi, these switches measure the flow rate to activate or deactivate equipment when they reach a set point. Tighten or loosen the adjustment screw to choose your flow rate anywhere within the set point range. As flowing gas pushes an internal piston, the switch reads the position of the piston to measure the flow. When the piston passes the set point, the switch actuates. These switches are single pole, double throw (SPDT) and can turn one device from off to on (normally open) or from on to off (normally closed). They must be mounted horizontally to function correctly. IP rated, they seal out dust and can be lightly rinsed.

These switches are calibrated with and measure air accurately. They can also be used with other gases by applying your gases’ specific-gravity conversion factor to calculate the new set point.

For technical drawings and 3-D models, click on a part number.

SPDT
Pipe Connections	Set Point, scfm	Approximate Difference Between Setpoint and Reset Point	Body Material	Max. Pressure	Max. Temp., °F	Max. Switching Current	Port-to-Port Lg.	Environmental Rating		Each
Brass Body with 304 Stainless Steel Fittings
1/4 NPT Female	0.4 to 4	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	0.8 A @ 240 V AC	5 3/16"	IP65	0000000	0000000
1/4 NPT Female	2 to 10	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	0.8 A @ 240 V AC	5 3/16"	IP65	0000000	000000
1/4 NPT Female	3 to 24	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	0.8 A @ 240 V AC	5 3/16"	IP65	0000000	000000
1/2 NPT Female	4 to 30	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	0.8 A @ 240 V AC	5 3/16"	IP65	0000000	000000
3/4 NPT Female	10 to 90	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	0.8 A @ 240 V AC	5 7/8"	IP65	0000000	000000
3/4 NPT Female	30 to 130	Adjustable	Nickel Plated Brass	3600 psi @ 70° F	212°	0.8 A @ 240 V AC	5 7/8"	IP65	0000000	000000