UL 508 Pressure Switches

Filter by

For Use With

Liquids

Air

Hydraulic Fluid

Hydraulic Fluid (Petroleum Based)

Oil

Oxygen

Water

System of Measurement

Inch

Pressure Set Point

0.08 in. H₂O to 1.2 in. H₂O

0.12 in. H₂O to 1.6 in. H₂O

0.2 in. H₂O to 2 in. H₂O

0.8 in. H₂O to 4 in. H₂O

2 in. H₂O to 10 in. H₂O

4 in. H₂O to 20 in. H₂O

Pipe Size

Maximum Continuous Pressure

Thread Type

Wire Connection

Maximum Switching Current @ Voltage

Set Point Adjustability

Adjustable

Operates On

Differential Pressure

Connection Material

Environment

Fitting Connection

Measurement Unit

Pounds per Square Inch

Switch Starting Position

Connects To

Gender

Maximum Short-Term Pressure

Adjustment Mechanism Location

External

Internal

Approximate Difference Between Set Point and Reset Point

RoHS

Compliant

Export Control Classification Number (ECCN)

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Specifications Met

REACH

DFARS Specialty Metals

Exempt

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44 Products

Pressure Switches


Style A	Style F

The traditional pressure switch. These power equipment, activate controls or alarms, or kick-off other actions when they reach a set pressure. Larger than compact pressure switches, they're easier to wire. These switches are single pole, double throw (SPDT) and can be installed to turn one circuit from off to on (normally open) or from on to off (normally closed).

Pressure Switches

Style A

Style A—Styles A-C, E-J, and L meet at least one safety standard.

	Max. Continuous Pressure, psi	Max. Short-Term Pressure, psi	Accuracy	Max. Switching Current @ Voltage	Process Temp. Range, ° F	Connection Material	For Use With		Each
Screw-Terminal Wire Connection







	1/4 Threaded NPT Male Pipe

	A	3 to 30	0.95	50	230	±1%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 1 amp @ 30V DC 30 mA @ 125V DC	0 to 200	Aluminum	Air, Hydraulic Fluid (Petroleum Based), Oil, Water	3899N11	0000000


	A	10 to 100	1.5	200	300	±1%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 1 amp @ 30V DC 30 mA @ 125V DC	0 to 200	Aluminum	Air, Hydraulic Fluid (Petroleum Based), Oil, Water	3899N12	000000
	A	30 to 300	2.5	400	500	±1%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 1 amp @ 30V DC 30 mA @ 125V DC	0 to 200	Aluminum	Air, Hydraulic Fluid (Petroleum Based), Oil, Water	3899N13	000000
	A	50 to 500	3.5	600	700	±1%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 1 amp @ 30V DC 30 mA @ 125V DC	0 to 200	Aluminum	Air, Hydraulic Fluid (Petroleum Based), Oil, Water	3899N14	000000

Pressure Switches with Cover

Style F

Switches with a cover protect against impact and keep dust off the switch.

Style F—Styles A-C, E-J, and L meet at least one safety standard.

NEMA 4X Enclosure Rating—NEMA 4 and NEMA 4X rated switches can be used in dirty and wet areas exposed to washdowns and the weather. NEMA 4X also has increased protection against corrosion, similar to 304 stainless steel.

	Max. Continuous Pressure, psi	Max. Short-Term Pressure, psi	Accuracy	Max. Switching Current @ Voltage	Process Temp. Range, ° F	Connection Material	For Use With	Enclosure Rating		Each
Screw-Terminal Wire Connection







	1/2 Threaded NPT Female Pipe

	F	1 to 20	0.55	500	1,000	±1%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 1 amp @ 30V DC 30 mA @ 125V DC	-70 to 300	316L Stainless Steel	Air, Hydraulic Fluid, Oil, Water	NEMA 4X	3899N15	0000000


	F	5 to 30	2	1,500	2,500	±1.5%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 1 amp @ 30V DC 30 mA @ 125V DC	-70 to 300	316 Stainless Steel	Air, Hydraulic Fluid, Oil, Water	NEMA 4X	47515K71	000000
	F	10 to 100	4.5	1,500	2,500	±1.5%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 1 amp @ 30V DC 30 mA @ 125V DC	-70 to 300	316 Stainless Steel	Air, Hydraulic Fluid, Oil, Water	NEMA 4X	47515K72	000000
	F	15 to 300	10	1,500	2,500	±1.5%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 1 amp @ 30V DC 30 mA @ 125V DC	-70 to 300	316 Stainless Steel	Air, Hydraulic Fluid, Oil, Water	NEMA 4X	47515K73	000000
	F	20 to 500	17	1,500	2,500	±1.5%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 1 amp @ 30V DC 30 mA @ 125V DC	-70 to 300	316 Stainless Steel	Air, Hydraulic Fluid, Oil, Water	NEMA 4X	47515K74	000000
	F	80 to 1,700	62	2,000	2,500	±1.5%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 1 amp @ 30V DC 30 mA @ 125V DC	-70 to 300	316 Stainless Steel	Air, Hydraulic Fluid, Oil, Water	NEMA 4X	47515K75	000000

Compact Pressure Switches

With a round body that’s at least one-third thinner than traditional pressure switches, these fit in tight, cramped spaces. They’re often built into pumps and hydraulic systems with limited space in order to turn equipment on and off, activate automated controls, or signal alarms when they reach a set pressure. These switches 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 also meet at least one American, Canadian, or European safety standard.

Quick-Disconnect-Terminal Wire Connection

Internal Adjustment—Switches with an internal setpoint adjustment have a sliding cover to prevent accidental setting changes.

	Max. Short-Term Pressure, psi	Accuracy	Max. Switching Current @ Voltage	Process Temp. Range, ° F	Connection Material	For Use With	Certification		Each
1/8 Threaded NPT Male Pipe







	Internal Adjustment

	4 to 50	3.5	1,000	3,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K81	0000000


	10 to 150	6	1,500	3,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K1	000000
	30 to 600	34	2,500	3,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K2	000000


	1/4 Threaded NPT Male Pipe







					Internal Adjustment

					100 to 1,500	120	8,000	10,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K82	000000


					180 to 3,000	225	8,000	10,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K3	000000
					400 to 4,700	350	8,000	10,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K83	000000
					4,000 to 7,500	675	10,000	12,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K84	000000

Wire Lead Connection

Internal Adjustment—Switches with an internal setpoint adjustment have a sliding cover to prevent accidental setting changes.

NEMA 4 Enclosure Rating—NEMA 4 rated switches stand up to dusty and washdown areas as well as the outdoor elements.

	Max. Short-Term Pressure, psi	Accuracy	Max. Switching Current @ Voltage	Process Temp. Range, ° F	Connection Material	For Use With	Enclosure Rating	Certification		Each
1/8 Threaded NPT Male Pipe







	Internal Adjustment

	4 to 50	3.5	1,000	3,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K85	0000000


	10 to 150	6	1,500	3,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K4	000000
	30 to 600	34	2,500	3,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K5	000000


	1/4 Threaded NPT Male Pipe







					Internal Adjustment

					100 to 1,500	120	8,000	10,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K86	000000


					180 to 3,000	225	8,000	10,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K6	000000
					400 to 4,700	350	8,000	10,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K87	000000
					4,000 to 7,500	675	10,000	12,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Air, Water	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K88	000000

Differential Pressure Switches for Air

Connects to

Tube

Often used with ovens, dryers, and HVAC systems, these switches detect small differences in air pressure to indicate a filter is clogged or help you maintain a certain air pressure. When the differential pressure reaches your setpoint, these switches can turn equipment on and off, activate automated controls, or signal alarms. They are single pole, double throw (SPDT) and can be installed to turn one circuit from off to on or from on to off. All meet at least one safety standard.

When measuring pressure in ductwork, pair them with a static pressure probe.

IP54 Enclosure Rating—Switches rated IP54 protect against dust and splashing water.

NEMA 13 Enclosure Rating— NEMA 13 rated switches can be used in dirty, wet, and oily areas.

	Accuracy	Max. Switching Current @ Voltage	Process Temp. Range, ° F	Connection Material	For Use With	Certification	Enclosure Rating		Each
Screw-Terminal Wire Connection







	1/4" Barbed Male Tube Connection

	0.08 to 1.2	0.05	40	±1%	1.5 amp @ 120V AC 400 mA @ 250V AC	0 to 185	Nylon	Air	C-ETL Listed, ETL Listed	IP54, NEMA 13	3964N11	000000


	0.12 to 1.6	0.08	40	±1%	1.5 amp @ 120V AC 400 mA @ 250V AC	0 to 185	Nylon	Air	C-ETL Listed, ETL Listed	IP54, NEMA 13	3964N12	00000
	0.2 to 2	0.09	40	±1%	1.5 amp @ 120V AC 400 mA @ 250V AC	0 to 185	Nylon	Air	C-ETL Listed, ETL Listed	IP54, NEMA 13	3964N13	00000
	0.8 to 4	0.45	40	±1%	1.5 amp @ 120V AC 400 mA @ 250V AC	0 to 185	Nylon	Air	C-ETL Listed, ETL Listed	IP54, NEMA 13	3964N14	00000
	2 to 10	0.7	40	±1%	1.5 amp @ 120V AC 400 mA @ 250V AC	0 to 185	Nylon	Air	C-ETL Listed, ETL Listed	IP54, NEMA 13	3964N15	00000
	4 to 20	1.2	40	±1%	1.5 amp @ 120V AC 400 mA @ 250V AC	0 to 185	Nylon	Air	C-ETL Listed, ETL Listed	IP54, NEMA 13	3964N16	00000

Pressure Switches for Oxygen

Cleaned to ASTM G93 requirements and then bagged, these switches meet the strict cleaning standards required for oxygen service lines. Removing all contaminants extends the life of the switch and helps maintain a safe environment.

When a set pressure is reached, these switches can turn equipment on and off, activate automated controls, or signal alarms. They have an internal setpoint adjustment with a sliding cover to prevent accidental setting changes. They’re single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed).

NEMA rated, they seal out dust and water from washdowns and the weather. These switches also meet UL 508, are CE marked, and are UL and C-UL recognized components, so they meet American, Canadian, and European safety standards.

Wire Lead Connection

	Approx. Difference Between Set Point and Reset Point, psi	Max. Continuous Pressure, psi	Max. Short-Term Pressure, psi	Accuracy	Max. Switching Current @ Voltage	Process Temp. Range, ° F	Connection Material	For Use With	Enclosure Rating	Certification		Each
1/8 Threaded NPT Male Pipe



	4 to 50	3.5	1,000	3,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Oxygen	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K12	0000000


	10 to 150	6	1,500	3,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Oxygen	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K14	000000
	30 to 600	34	2,500	3,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Oxygen	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K16	000000


	1/4 Threaded NPT Male Pipe



			100 to 1,500	120	8,000	10,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Oxygen	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K17	000000


			180 to 3,000	225	8,000	10,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Oxygen	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K18	000000
			400 to 4,700	350	8,000	10,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Oxygen	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K19	000000
			4,000 to 7,500	675	10,000	12,000	±1.5%	5 amp @ 125V AC 5 amp @ 250V AC 3 amp @ 30V DC 250 mA @ 125V DC	0 to 200	Brass	Oxygen	NEMA 4	C-UL Recognized Component, CE Marked, UL Recognized Component	3427K21	000000

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