UL 508 Flow Switches | McMaster-Carr

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7 Products

Insertion-Mount Flow Switches


Socket Connection with IP65 Rating	Threaded Connection with IP65 Rating

Avoid complicated inline installation—these flow switches insert into a tee or pipe outlet, so you don’t need to disassemble your pipeline. They have a paddle that’s pushed as your liquid moves through to determine flow. When the paddle reaches a set position determined by the set point, it activates or deactivates equipment. They are single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed). They should be mounted vertically into a large-diameter horizontal pipeline, so liquid pushes the paddle.

These flow switches are calibrated with water. You can use them with other liquids, but they may not measure accurately if the liquid’s viscosity differs from water.

Choose a fitting material that is compatible with the liquid you're running through your line.

Noryl Body—Switches with a Noryl body have a paddle that you trim to adjust the set point. The more you trim, the higher the set point.

Socket-Connect Fitting Connection—Socket-connect flow switches bond to an unthreaded PVC pipe tee or pipe outlet with PVC cement and primer (not included).

Brass Fitting—Brass and 316 stainless steel fittings resist impact better than Noryl fittings.

Noryl Fitting—Noryl fittings work with a wide range of chemicals.

IP65 Enclosure Rating—IP65 rated switches seal out dust and can be lightly rinsed.

	Paddle Material	Max. Pressure @ Temp.	Temp. Range, ° F	Max. Switching Current @ Voltage	Body Ht.	Enclosure Rating	Specs. Met		Each
Noryl Body with 3/4 Socket-Connect Noryl Fittings







	Set-Point-Adjustment Trimmable Paddles

	1 1/2 2 3	7.7 to 19.3 10.3 to 21 16.5 to 52	110; 150; 390	Noryl	160 psi @ 70° F	-13 to 212	1 amp @ 230V AC 1 amp @ 48V DC	2 1/2"	IP65	UL 508	2766K41	0000000


	1 1/2 2 3	7.9 to 15 10 to 22 18 to 50	144; 240; 650	301 Stainless Steel	160 psi @ 70° F	-13 to 212	1 amp @ 230V AC 1 amp @ 48V DC	2 1/2"	IP65	UL 508	2766K111	000000


	Noryl Body with 1/2 NPT Male Threaded Brass Fittings







					Set-Point-Adjustment Trimmable Paddles

					1 1/2 2 3 4 8	7.7 to 19.3 10.3 to 21 16.5 to 52 25.5 to 68 126 to 240	110; 150; 390; 420; 1,100	Noryl	160 psi @ 70° F	-13 to 212	1 amp @ 230V AC 1 amp @ 48V DC	2 1/2"	IP65	UL 508	2766K43	000000


					1 1/2 2 3 4 8	7.9 to 15 10 to 22 18 to 50 25 to 66 114 to 176	144; 240; 650; 800; 1,900	301 Stainless Steel	160 psi @ 70° F	-13 to 212	1 amp @ 230V AC 1 amp @ 48V DC	2 1/2"	IP65	UL 508	2766K112	000000

Fixed-Set-Point Insertion-Mount Flow Switches

Easy to install, these flow switches come already set to a specific set point and don’t require you to disassemble your pipeline. Instead of mounting them inline, insert them into an unthreaded PVC pipe tee or pipe outlet in large-diameter pipe. They have a paddle that’s pushed as your liquid moves through to determine flow. When the paddle reaches a set position determined by the set point, it activates or deactivates equipment. All are single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed). IP rated, they seal out dust and can be lightly rinsed.

They should be mounted vertically into a horizontal pipeline, so liquid pushes the paddle. Secure them with PVC cement and primer (not included).

These flow switches are calibrated with water. You can use them with other liquids, but they may not measure accurately if the liquid’s viscosity differs from water.

	For Pipe Size	Set Point, gpm	Max. Flow Rate, gpm	Max. Pressure @ Temp.	Temp. Range, ° F	Voltage	Max. Switching Current @ Voltage	Body Ht.	Enclosure Rating	Specs. Met		Each
Noryl Body with Socket-Connect PVC Fittings



	1/2	1/2	1.03	7.9	160 psi @ 70° F	-13 to 212	230V AC/48V DC	1 amp @ 230V AC 1 amp @ 48V DC	2 1/2"	IP65	UL 508	2766K113	0000000


	3/4	3/4	1.94	21	160 psi @ 70° F	-13 to 212	230V AC/48V DC	1 amp @ 230V AC 1 amp @ 48V DC	2 1/2"	IP65	UL 508	2766K114	000000
	3/4	1 1 1/4	2.7, 6.8	31, 40	160 psi @ 70° F	-13 to 212	230V AC/48V DC	1 amp @ 230V AC 1 amp @ 48V DC	2 1/2"	IP65	UL 508	2766K115	000000