E34743 Vacuum Switches | McMaster-Carr

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Pressure Set Point

0 psi to 15 psi

0 psi to 30 psi

0 psi to 60 psi

0 in. Hg to 30 in. Hg

6 in. Hg to 24 in. Hg

For Use With

Operates On

Maximum Continuous Pressure

Maximum Switching Current @ Voltage

Pipe Size

Approximate Difference Between Set Point and Reset Point

Measurement Unit

Pounds per Square Inch

Thread Type

NPT

Set Point Adjustability

Enclosure Rating

Connection Material

Environment

Wire Connection

Housing Material

Fitting Connection

Gender

Maximum Process Temperature

Certification

REACH

RoHS

Compliant with Exemptions

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

UL File Number

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

Maximum Short-Term Pressure

250 psi

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4 Products

Pressure and Vacuum Switches

Because these switches work with both positive and negative (vacuum) pressures, you can use them in applications that span both. For example, these switches can turn on a light when they reach the setpoint to indicate which pressure is flowing. They’re also often used to trigger automated controls and activate alarms. These switches are single pole, double throw (SPDT) and can either turn one circuit from off to on or from on to off.

NEMA 4X and IP66 rated, they’re dust tight and protected from washdowns and corrosion. All are UL and C-UL listed, CSA and CSA-US certified, and CE marked, so they meet U.S., Canadian, and European safety standards.

	Set Point
	Pressure, psi	Vacuum, in. Hg	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		Each
Screw-Terminal Wire Connection







				1/4 NPT Female

				0 to 15	0 to 30	1.5	15	250	±1%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 6 amp @ 30V DC 500 mA @ 125V DC 250 mA @ 250V DC	20 to 300	316 Stainless Steel	Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Water	IP66, NEMA 4X	3871N11	0000000


				0 to 30	0 to 30	2.25	30	250	±1%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 6 amp @ 30V DC 500 mA @ 125V DC 250 mA @ 250V DC	20 to 300	316 Stainless Steel	Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Water	IP66, NEMA 4X	3871N12	000000
				0 to 60	0 to 30	4	60	250	±1%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC 6 amp @ 30V DC 500 mA @ 125V DC 250 mA @ 250V DC	20 to 300	316 Stainless Steel	Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Water	IP66, NEMA 4X	3871N13	000000

Adjustable-Reset Vacuum Switches

Control the amount of vacuum change between when these switches activate and deactivate by adjusting when they reset. Also known as adjustable deadband and differential switches, you can set the reset point anywhere within the setpoint range. Use them to power equipment, signal controls, or trigger alarms when they reach the set vacuum. They’re single pole, double throw (SPDT) and can either turn one circuit from off to on (normally open) or on to off (normally closed). All meet safety standards.

All protect against some corrosion.

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

IP66 Enclosure Rating—IP66 rated switches can be used in dirty and wet areas exposed to washdowns.

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







	1/4 NPT Female Pipe Connection

	6 to 24	Adjustable	11.7	250	±1%	10 amp @ 125V AC 10 amp @ 250V AC 250 mA @ 250V AC 500 mA @ 125V DC	20 to 300	316L Stainless Steel	Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Water	NEMA 4X, IP66	8015N11	0000000