Top Mount Switches | McMaster-Carr

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56 Products

Vertical-Mount Float Switches for Fuels and Oils


Float Switch	Float Switch with Splash Guard

Mount these switches from outside the tank through a threaded connection at the top or bottom of your tank. They activate process equipment such as pumps or motors when the diesel fuel, hydraulic fluid, or oil level in your tank reaches the float.

316 Stainless Steel Float—Choose switches with a stainless steel float for durability in harsh conditions.

Splash Guard—Switches with splash guard minimize false switch activation caused by splashing liquid.

	Min. Specific Gravity	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Float Ht.	Overall Dia.	Electrical Connection		Each
120V AC/240V AC Input Voltage







	Buna-N Float

	1/8	NPT	Male	0.45	150 psi @ 70° F	35 to 250	1 9/16"	1 Off/1 On	SPST-NO SPST-NC	0.17 amp @ 120V AC	Top, Bottom	1"	1"	Wire Leads	48095K11	000000


	1/8	NPT	Male	0.55	150 psi @ 70° F	35 to 145	1 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Top, Bottom	1"	1"	Wire Leads	48095K61	00000
	1/4	NPT	Male	0.55	150 psi @ 70° F	35 to 145	2 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top, Bottom	2"	1 1/4"	Wire Leads	48095K81	00000




			Buna-N Float with Splash Guard

			1/8	NPT	Male	0.55	150 psi @ 70° F	35 to 145	1 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Top, Bottom	1"	1 1/2"	Wire Leads	48095K62	00000


			1/4	NPT	Male	0.55	150 psi @ 70° F	35 to 145	2 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top, Bottom	2"	2"	Wire Leads	48095K82	00000




					316 Stainless Steel Float

					1/8	NPT	Male	0.7	300 psi @ 70° F	35 to 300	2 1/16"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top, Bottom	1 3/16"	1 1/8"	Wire Leads	4646K82	000000

Vertical-Mount Float Switches for Water


Buna-N Float	Polypropylene Float	CPVC Float	316 Stainless Steel Float

Mount these switches from outside the tank through a threaded connection at the top or bottom of your tank. They activate process equipment such as pumps or motors when the water level in your tank reaches the float. Choose switches with a stainless steel float for durability in harsh conditions.

	Min. Specific Gravity	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Float Ht.	Overall Dia.	Electrical Connection		Each
120V AC/240V AC Input Voltage







	Buna-N Float

	1/8	NPT	Male	0.45	50 psi @ 70° F	35 to 150	1 7/8"	1 On	SPST-NC	0.17 amp @ 120V AC	Top, Bottom	1 1/16"	1 7/8"	Wire Leads	48095K41	000000




			Polypropylene Float

			1/8	NPT	Male	0.6	50 psi @ 70° F	35 to 225	1 9/16"	1 Off/1 On	SPST-NO SPST-NC	0.17 amp @ 120V AC	Top, Bottom	1"	1"	Wire Leads	50195K11	00000


			1/8	NPT	Male	0.9	150 psi @ 70° F	35 to 150	1 9/16"	1 Off/1 On	SPST-NO SPST-NC	0.17 amp @ 120V AC	Top, Bottom	1"	1"	Wire Leads	50195K75	00000
			1/8	NPT	Male	0.9	150 psi @ 70° F	35 to 150	1 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.17 amp @ 120V AC	Top, Bottom	1"	3/4"	Wire Leads	50195K65	00000




					CPVC Float

					1/4	NPT	Male	0.85	15 psi @ 70° F	35 to 180	2 15/16"	1 Off/1 On	SPST-NO SPST-NC	0.17 amp @ 120V AC	Top, Bottom	1 13/16"	1 1/2"	Wire Leads	5127K21	000000




							316 Stainless Steel Float

							1/2	NPT	Male	0.35	300 psi @ 70° F	35 to 300	4 13/16"	1 Off/1 On	SPST-NO SPST-NC	0.83 amp @ 120V AC	Top, Bottom	3 1/2"	3 1/2"	Wire Leads	4646K37	000000

Dual-Level Vertical-Mount Float Switches for Water

Empty and fill your tank with a single device—these dual-level switches include two float switches that actuate at different levels. The stem can be cut to length. Mount through a threaded connection at the top of your tank.

													Overall
	Pipe Size	Thread Type	Gender	Min. Specific Gravity	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Float Ht.	Ht.	Dia.	Electrical Connection	Includes		Each
120V AC/240V AC Input Voltage







				Polypropylene Float

				2	NPT	Male	0.85	100 psi @ 70° F	35 to 220	36"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top	2"	38 5/8"	1 1/2"	Wire Leads	Two Switches, Fittings	5267K44	0000000

Vertical-Mount Hazardous Location Float Switches for Fuels and Oils

For use in locations with flammable gases and combustible dust, these switches are UL listed and CSA certified for Class I, Divisions 1 and 2, Groups C and D; and Class II, Divisions 1 and 2, Groups E, F, and G. Mount them vertically through the top of your tank. They're rated NEMA 4 for protection from washdowns.

	Pipe											Float			Conduit
	Size	Thread Type	Gender	Min. Specific Gravity	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Lg.	Dia.	Electrical Connection	Trade Size	Thread Type	Gender	Certification		Each
120V AC/240V AC Input Voltage







				316 Stainless Steel Body and Float

				1 1/2	NPT	Male	0.7	100 psi @ 70° F	35 to 275	9 1/4"	1 Off or 1 On	SPDT	10 amp @ 120V AC	Top	4 1/2"	1 5/8"	Wire Leads	3/4	NPT	Female	UL Listed, CSA Certified, FM Approved	4914K97	000000000

Through-Wall Vertical-Mount Float Switches for Water

Install these switches into an unthreaded hole at the top or bottom of your tank and secure with a nut from inside the tank. They activate process equipment such as pumps or motors when the water level in your tank reaches the float.

	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Float Ht.	Overall Dia.	Electrical Connection	Includes		Each
120V AC/240V AC Input Voltage







	Polypropylene Float

	3/8"	0.9	150 psi @ 70° F	35 to 150	1 9/16"	1 Off/1 On	SPST-NO SPST-NC	0.17 amp @ 120V AC	Through Wall, Top, Bottom	1"	1"	Wire Leads	Mounting Nut	50195K76	000000

Vertical-Mount Compressed-Air Float Switches for Fuels and Oils

Mount these switches through the top of your tank. They actuate with a compressed air valve instead of an electrical signal. The air valve opens when diesel fuel, hydraulic fluid, oil, or water moves the float.

Pipe											Air
Size	Thread Type	Gender	Min. Specific Gravity	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Mounting Location	Air Inlet Pressure, psi	Overall Lg.	No. of Ports	For Tube ID	Gender		Each







			303 Stainless Steel Body and 304 Stainless Steel Float

			1	NPT	Male	0.5	200 psi @ 70° F	35 to 140	3 1/2"	Top	30 to 100	7 5/8"	3	3/32"	Male	3792K42	0000000

Paddle Level Switches for Dry Materials

Vertical Mount

Monitor the level of dry material in surge bins, tanks, and silos to avoid overspills and outages. With a long paddle, these switches extend farther into large storage containers to detect material levels where other types of switches can’t reach. You can even adjust the paddle's sensitivity to materials of different sizes and shapes, such as powders, plastic pellets, and wood chips. Install multiple switches on the same container to monitor levels at various points. They are rated NEMA 4X and IP66 for protection from corrosion and washdowns.

Vertical Mount—Mount to the roof of containers to indicate high levels when loading material. For domed roofs, you can extend these switches farther down by connecting the paddle to your desired length of _1/8 NPT Schedule 40 pipe. The paddle rotates freely until material rises to its level and stops it, triggering a conveyor, pump, or other piece of equipment to prevent overfilling.

With Alarm—Switches with an alarm alert you to potential malfunctions before they occur. They continuously perform self-diagnostics to detect everything from motor failure to seized bearings. When they detect an error, an LED light flashes in a corresponding code, so maintenance workers will immediately know which problem they need to fix.

				Paddle				Switch
	Insertion Dp.	Material Wt. Cap. Range, lb/ft³	Max. Pressure @ Temp.	Speed, rpm	Lg.	Wd.	Material	Starting Position	Designation	Current @ Voltage	Enclosure Rating	Hazardous Location Rating	Certification		Each
Vertical Mount







				Without Alarm

				12"	30 to 70	30 psi @ 70° F	1	5"	1 1/2"	316 Stainless Steel	1 Off or 1 On	SPDT	20 amp @ 120V AC	IP66 NEMA 4X	NEC Class I Divisions 1, 2 Groups C, D NEC Class II Divisions 1, 2 Groups E, F, G	UL Listed C-UL Listed	49005K52	0000000




						With Alarm

						12"	30 to 70	30 psi @ 70° F	1	5"	1 1/2"	316 Stainless Steel	1 Off or 1 On	SPDT	8 amp @ 120V AC	IP66 NEMA 4X	NEC Class I Divisions 1, 2 Groups C, D NEC Class II Divisions 1, 2 Groups E, F, G	UL Listed C-UL Listed	49005K36	000000

Replacement Electric Motors for 20 amp @ 120V AC Paddle Level Switches

Voltage, V AC	Includes		Each
120	Bracket, Washer	49005K71	0000000

Vertical-Mount Float Switches for Food and Beverage


Style A	Style B	Style C

Mount these switches into a threaded connection at the top or bottom of your tank. Often used in food-processing applications, they meet NSF/ANSI Standard 169.

	Switches																		Replacement Floats
	Style	Pipe Size	Thread Type	Gender	Min. Specific Gravity	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Float Ht.	Overall Dia.	Electrical Connection	Certification		Each		Each
120V AC/240V AC Input Voltage







				Polypropylene Float

				A	1/8	NPT	Male	0.9	100 psi @ 70° F	35 to 220	1 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Top, Bottom	1"	1"	Wire Leads	UL Recognized Component, CSA Certified	50195K93	000000	50195K96	000000


				A	1/4	NPT	Male	0.87	100 psi @ 70° F	35 to 220	2 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top, Bottom	2"	1 1/2"	Wire Leads	UL Recognized Component, CSA Certified	50195K13	00000	50195K97	00000




						PVDF Float

						A	1/8	NPT	Male	0.85	15 psi @ 70° F	35 to 220	1 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Top, Bottom	1"	1"	Wire Leads	UL Recognized Component, CSA Certified	44785K13	00000	44785K18	00000




								316 Stainless Steel Float

								B	1/8	NPT	Male	0.8	300 psi @ 70° F	35 to 390	1 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Top, Bottom	1 3/16"	1 1/8"	Wire Leads	UL Recognized Component, CSA Certified	4646K83	00000	4646K89	00000


								B	1/4	NPT	Male	0.65	200 psi @ 70° F	35 to 390	2 15/16"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top, Bottom	2 1/8"	2 1/8"	Wire Leads	UL Recognized Component, CSA Certified	4646K85	00000	4646K87	00000
								B	1/4	NPT	Male	0.65	200 psi @ 70° F	35 to 480	2 15/16"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top, Bottom	2 1/8"	2 1/8"	Wire Leads	UL Recognized Component, CSA Certified	4646K15	00000	4646K87	00000
								C	1/4	NPT	Male	0.8	500 psi @ 70° F	35 to 390	2 7/8"	1 Off/1 On	SPST-NO SPST-NC	1 amp @ 120V AC	Top, Bottom	2 1/16"	2 1/16"	Wire Leads	—	4646K53	000000	4646K87	00000
								C	1/4	NPT	Male	0.8	750 psi @ 70° F	35 to 300	2 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.83 amp @ 120V AC	Top, Bottom	2 1/16"	2 1/16"	Wire Leads	UL Recognized Component, CSA Certified	4646K23	000000	4646K87	00000

Replacement Float Clips

		Each
Replacement Clip for 1/4 Pipe Size Floats	4646K86	00000
Replacement Clip for 1/8 Pipe Size Polypropylene Floats	50195K95	0000
Replacement Clip for 1/8 and 3/8 Pipe Size 316 Stainless Steel Floats	4646K88	0000
Replacement Clip for PVDF Floats	44785K17	0000

Dual-Level Vertical-Mount Float Switches for Fuels and Oils

													Overall
	Pipe Size	Thread Type	Gender	Min. Specific Gravity	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Float Ht.	Ht.	Dia.	Electrical Connection		Each
120V AC/240V AC Input Voltage







				Buna-N Float

				2	NPT	Male	0.55	150 psi @ 70° F	35 to 180	33 1/2"	1 Off/1 On	SPST-NO SPST-NC	0.17 amp @ 120V AC	Top	1 11/16"	35"	1 7/8"	Wire Leads	5267K84	0000000




						316 Stainless Steel Float

						2	NPT	Male	0.75	750 psi @ 70° F	35 to 275	34"	1 Off/1 On	SPST-NO SPST-NC	0.17 amp @ 120V AC	Top	2"	35 1/2"	2 1/16"	Wire Leads	5267K88	00000000

Hazardous Location Float Switches for Water

For use in locations with flammable gases and combustible dust, these switch are UL listed and CSA certified for Class I, Divisions 1 and 2, Groups C and D; and Class II, Divisions 1 and 2, Groups E, F, and G. Mount them vertically through the top of your tank. They're rated NEMA 4 for protection from washdowns.

	Pipe											Float			Conduit
	Size	Thread Type	Gender	Min. Specific Gravity	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Lg.	Dia.	Electrical Connection	Trade Size	Thread Type	Gender	Certification		Each
120V AC/240V AC Input Voltage







				Brass Body and 316 Stainless Steel Float

				1 1/2	NPT	Male	0.7	100 psi @ 70° F	35 to 275	5 1/4"	1 Off or 1 On	SPDT	10 amp @ 120V AC	Top	4 1/2"	1 5/8"	Wire Leads	3/4	NPT	Female	UL Listed, CSA Certified, FM Approved	5363N13	0000000


				1 1/2	NPT	Male	0.7	100 psi @ 70° F	35 to 275	7 1/4"	1 Off or 1 On	SPDT	10 amp @ 120V AC	Top	4 1/2"	1 5/8"	Wire Leads	3/4	NPT	Female	UL Listed, CSA Certified, FM Approved	5363N16	000000
				1 1/2	NPT	Male	0.7	100 psi @ 70° F	35 to 275	9 1/4"	1 Off or 1 On	SPDT	10 amp @ 120V AC	Top	4 1/2"	1 5/8"	Wire Leads	3/4	NPT	Female	UL Listed, CSA Certified, FM Approved	4914K96	000000
				2	NPT	Male	0.7	100 psi @ 70° F	35 to 275	9 1/4"	1 Off or 1 On	SPDT	10 amp @ 120V AC	Top	4 1/2"	1 5/8"	Wire Leads	3/4	NPT	Female	UL Listed, CSA Certified, FM Approved	5363N11	000000

Vertical-Mount Float Switches for Chemicals


Float Switch	Float Switch with Splash Guard

Mount these switches from outside the tank through a threaded connection at the top or bottom of your tank. They activate process equipment such as pumps or motors when the chemical level in your tank reaches the float.

316 Stainless Steel Float—Choose switches with a 316 stainless steel float for durability in harsh conditions.

Splash Guard—Switches with splash guard minimize false switch activation caused by splashing liquid.

	Min. Specific Gravity	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Float Ht.	Overall Dia.	Electrical Connection		Each
120V AC/240V AC Input Voltage







	Polypropylene Float

	1/4	NPT	Male	0.85	100 psi @ 70° F	35 to 220	2 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top, Bottom	2"	1 1/2"	Wire Leads	50195K85	000000


	1/4	NPT	Male	0.85	100 psi @ 70° F	35 to 220	2 7/8"	1 Off/1 On	SPST-NO SPST-NC	1 amp @ 120V AC	Top, Bottom	2"	1 1/2"	Wire Leads	50195K62	00000




			Polypropylene Float with Splash Guard

			1/8	NPT	Male	0.9	100 psi @ 70° F	35 to 220	1 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.3 amp @ 120V AC	Top, Bottom	1"	1 1/2"	Wire Leads	50195K94	00000


			1/4	NPT	Male	0.85	100 psi @ 70° F	35 to 220	2 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top, Bottom	2"	2"	Wire Leads	50195K84	00000




					PVDF Float with Splash Guard

					1/8	NPT	Male	0.95	15 psi @ 70° F	35 to 220	1 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.3 amp @ 120V AC	Top, Bottom	1"	1 1/2"	Wire Leads	44785K16	00000




							316 Stainless Steel Float with Splash Guard

							1/4	NPT	Male	0.65	200 psi @ 70° F	35 to 480	2 15/16"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top, Bottom	2 1/8"	2 3/8"	Wire Leads	4646K16	000000

Through-Wall Vertical-Mount Float Switches for Chemicals

	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Float Ht.	Overall Dia.	Electrical Connection	Includes		Each
120V AC Input Voltage







	Polypropylene Float

	3/8"	0.7	50 psi @ 70° F	35 to 220	1 1/4"	1 Off	SPST-NO	0.12 amp @ 120V AC	Through Wall, Top, Bottom	5/8"	9/16"	Wire Leads	Mounting Nut	50195K74	000000


	3/8"	0.7	50 psi @ 70° F	35 to 220	1 1/4"	1 On	SPST-NC	0.12 amp @ 120V AC	Through Wall, Top, Bottom	5/8"	9/16"	Wire Leads	Mounting Nut	50195K73	00000

Vertical-Mount Float Switches with Brackets for Chemicals

Use the included bracket to mount these switches to the inside of your tank. They activate process equipment such as pumps or motors when the chemical level in your tank reaches the float. A splash guard minimizes false switch activation caused by splashing liquid.

316 Stainless Steel Float—Choose switches with a 316 stainless steel float for durability in harsh conditions.

	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Float Ht.	Overall Dia.		Each
120V AC/240V AC Input Voltage







	Polypropylene Float with Splash Guard

	0.85	100 psi @ 70° F	35 to 220	3 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top, Bottom	2"	2 1/2"	4666K73	0000000




			316 Stainless Steel Float with Splash Guard

			0.65	85 psi @ 70° F	35 to 230	3 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.5 amp @ 120V AC	Top, Bottom	2"	2 1/2"	4666K74	000000

Vertical-Mount Float Switches with Bracket for Fuels and Oils

Use the included bracket to mount these switches to the inside of your tank. They activate process equipment such as pumps or motors when the diesel fuel, hydraulic fluid, or oil level in your tank reaches the float.

												Mounting
	Min. Specific Gravity	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Float Ht.	Overall Dia.	Electrical Connection	Fasteners Included	No. of Holes	Hole Dia.		Each
120V AC/240V AC Input Voltage







				Buna-N Float

				0.55	150 psi @ 70° F	35 to 140	3 3/16"	1 Off	SPST-NO	0.17 amp @ 120V AC	Top, Bottom	1 9/16"	2 5/8"	Wire Leads	No	2	9/32"	4879K21	0000000


				0.55	150 psi @ 70° F	35 to 140	3 3/16"	1 Off	SPST-NO	0.4 amp @ 120V AC	Top, Bottom	1 9/16"	2 5/8"	Wire Leads	No	2	9/32"	4879K25	000000
				0.55	150 psi @ 70° F	35 to 140	3 3/16"	1 On	SPST-NC	0.17 amp @ 120V AC	Top, Bottom	1 9/16"	2 5/8"	Wire Leads	No	2	9/32"	4879K23	000000
				0.55	150 psi @ 70° F	35 to 140	3 3/16"	1 On	SPST-NC	0.4 amp @ 120V AC	Top, Bottom	1 9/16"	2 5/8"	Wire Leads	No	2	9/32"	4879K27	000000