Chemical Floats | McMaster-Carr

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55 Products

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

Floats for Chemicals

Made of polyethylene, these floats can be used with chemicals, salts, and caustic fluids.

Polyethylene Rectangle Floats

Image of Product. Front orientation. Floats. Floats for Chemicals, Rectangle.

Lg.	Wd.	Ht.	Thread Size	Thread Type	Gender	Max. Pressure	Temp. Range, ° F	Color	For Container Type		Each
3 3/4"	2 1/2"	1 7/16"	8-32	UNC	Female	Not Rated	35 to 140	Off-White	Open Tank	8154K61	00000

Polyethylene Ball Floats

Image of Product. Front orientation. Floats. Floats for Chemicals, Ball.

Ball floats are self-tapping when used with a threaded rod.

Dia.	Thread Size	Thread Type	Gender	Max. Pressure	Temp. Range, ° F	Color	Features	For Container Type		Each
6"	1/4"-20	UNC	Female	Not Rated	35 to 140	Black	UV Resistant	Open Tank	8154K11	000000
6"	5/16"-18	UNC	Female	Not Rated	35 to 140	Black	UV Resistant	Open Tank	8154K21	00000
8"	1/4"-20	UNC	Female	Not Rated	35 to 140	Black	UV Resistant	Open Tank	8154K51	00000
8"	5/16"-18	UNC	Female	Not Rated	35 to 140	Black	UV Resistant	Open Tank	8154K41	00000
8"	3/8"-16	UNC	Female	Not Rated	35 to 140	Black	UV Resistant	Open Tank	8154K31	00000

Float Valves for Chemicals


Elbow Valve Body	Straight Valve Body

Made of stainless steel, these float valves have excellent corrosion resistance even when exposed to chemicals.

For Open Tanks—Valves for open tanks are for use only in an open tank.

For Closed Tanks—Valves for closed tanks are designed to withstand the pressure in a closed tank.

	Inlet				Outlet							Float Rod				For Open Tanks, PTFE Seal			For Closed Tanks, PTFE Seal
	Pipe Size	Thread Type	Gender	Connection	Connection Port	Pipe Size	Thread Type	Gender	Flow Rate @ Pressure	Max. Pressure, psi	Float Dia.	Lg.	Pipe Size	Thread Type	Float Material	Temp. Range, ° F		Each	Temp. Range, ° F		Each
For Alcohol, Chemicals, Acetone, Hydraulic Fluid







				316 Stainless Steel Float Rod—Elbow Valve Body

				1/2	NPT	Female	Threaded	Pipe	1/2	NPT	Female	30 gpm @ 50 psi	100	5"	16"	1/8	NPT	304 Stainless Steel	—	———	0	35 to 350	47395K51	0000000


				1/2	NPT	Female	Threaded	Pipe	1/2	NPT	Female	30 gpm @ 50 psi	100	5"	16"	1/4	NPT	304 Stainless Steel	35 to 350	7903K51	0000000	—	———	0
				3/4	NPT	Female	Threaded	Pipe	3/4	NPT	Female	50 gpm @ 50 psi	100	5"	16"	1/8	NPT	304 Stainless Steel	—	———	0	35 to 350	47395K52	000000
				3/4	NPT	Female	Threaded	Pipe	3/4	NPT	Female	50 gpm @ 50 psi	100	5"	16"	1/4	NPT	304 Stainless Steel	35 to 350	7903K52	000000	—	———	0
				1	NPT	Female	Threaded	Pipe	1	NPT	Female	75 gpm @ 50 psi	100	6"	18"	1/4	NPT	304 Stainless Steel	35 to 350	7903K53	000000	35 to 350	47395K53	00000000
				1 1/2	NPT	Female	Threaded	Pipe	1 1/2	NPT	Female	125 gpm @ 50 psi	100	6"	18"	1/4	NPT	304 Stainless Steel	35 to 350	7903K54	00000000	35 to 350	47395K54	00000000




						316 Stainless Steel Float Rod—Straight Valve Body

						1/2	NPT	Female	Threaded	Pipe	1/2	NPT	Female	30 gpm @ 50 psi	100	5"	16"	1/4	NPT	304 Stainless Steel	35 to 350	7903K71	000000	35 to 350	47395K71	000000


						3/4	NPT	Female	Threaded	Pipe	3/4	NPT	Female	50 gpm @ 50 psi	100	5"	16"	1/4	NPT	304 Stainless Steel	35 to 350	7903K72	000000	35 to 350	47395K72	000000
						1	NPT	Female	Threaded	Pipe	1	NPT	Female	75 gpm @ 50 psi	100	6"	18"	1/4	NPT	304 Stainless Steel	35 to 350	7903K73	000000	35 to 350	47395K73	00000000
						1 1/2	NPT	Female	Threaded	Pipe	1 1/2	NPT	Female	125 gpm @ 50 psi	100	6"	18"	1/4	NPT	304 Stainless Steel	35 to 350	7903K74	00000000	35 to 350	47395K74	00000000

Hazardous Location Float Switches for Chemicals


Style A	Style B

Designed for use in areas where flammable substances are present, these switches are CSA certified for hazardous locations. Mount them through a tank wall.

Style A—Style A meet Class I, Divisions 1 and 2, Groups A, B, C, and D; Class II, Divisions 1 and 2, Groups E, F, and G; and Class III, Divisions 1 and 2.

Style B—Style B meet Class I, Divisions 1 and 2, Groups C and D; Class II, Divisions 1 and 2, Groups E, F, and G; and Class III, Divisions 1 and 2.

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







				316 Stainless Steel Body and Float

				A	1/2	NPT	Male	0.7	300 psi @ 70° F	0 to 390	4 5/8"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Wire Leads	1/4	NPT	Male	UL Recognized Component, CSA Certified, CE Marked	46815K11	0000000


				A	1/2	NPT	Male	0.7	300 psi @ 70° F	0 to 390	4 5/8"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Wire Leads	1/2	NPT	Male	UL Recognized Component, CSA Certified, CE Marked	46815K22	000000
				A	1	NPT	Male	0.7	300 psi @ 70° F	0 to 390	4 5/8"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Wire Leads	1/2	NPT	Male	UL Recognized Component, CSA Certified, CE Marked	46815K21	000000
				B	1 1/2	NPT	Male	0.4	1,500 psi @ 70° F	0 to 300	3 1/4"	1 Off/1 On	SPST-NO SPST-NC	0.83 amp @ 120V AC	Wire Leads	1/2	NPT	Male	CSA Certified, FM Approved	5300K55	000000
				B	2	NPT	Male	0.4	1,500 psi @ 70° F	0 to 300	3 1/4"	1 Off/1 On	SPST-NO SPST-NC	0.83 amp @ 120V AC	Wire Leads	1/2	NPT	Male	CSA Certified, FM Approved	5300K58	000000

Through-Wall Horizontal-Mount Float Switches for Chemicals


Float Switch	Float Switch with Splash Guard

Mount these switches through an unthreaded hole in your tank wall and secure with a nut from outside the tank. They activate process equipment such as pumps or motors when the chemical level in your tank reaches the float.

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

	Switches													Replacement Floats
	For Hole Dia.	Min. Specific Gravity	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Current @ Voltage	Mounting Location	Electrical Connection	Includes		Each		Each
120V AC/240V AC Input Voltage







				316 Stainless Steel Body and Float with Splash Guard

				3/8"	0.8	300 psi @ 70° F	-40 to 390	2 9/16"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Through Wall	Wire Leads	Mounting Nut	46815K18	0000000	4646K89	000000




						316 Stainless Steel Body and Float

						1/2"	0.8	100 psi @ 70° F	-40 to 390	3 3/16"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Through Wall	Wire Leads	Mounting Nut	46815K23	000000	———	0

Horizontal-Mount Float Switches for Chemicals


Switch	Switch with Splash Guard

Install these switches into a threaded connection in your tank wall from outside the tank. They activate process equipment such as pumps or motors when the chemical level in your tank reaches the float.

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

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







				PVDF Body and Float

				1/2	NPT	Male	0.85	100 psi @ 70° F	-40 to 220	2 3/4"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Wire Leads	1/2	NPT	Male	5082K21	000000




						PVDF Body and Float with Splash Guard

						1	NPT	Male	0.85	100 psi @ 70° F	-40 to 220	1 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Wire Leads	1/2	NPT	Male	5082K22	000000




								Polypropylene Body and Float

								1/2	NPT	Male	0.7	100 psi @ 70° F	-40 to 220	2 3/4"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Wire Leads	1/4	NPT	Male	46515K43	00000




										Polypropylene Body and Float with Splash Guard

										1	NPT	Male	0.7	100 psi @ 70° F	-40 to 220	1 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Wire Leads	—	—	—	46515K71	00000


										1	NPT	Male	0.7	100 psi @ 70° F	-40 to 220	1 7/8"	1 Off/1 On	SPST-NO SPST-NC	0.28 amp @ 120V AC	Wire Leads	1/2	NPT	Male	46515K81	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

Float Valve Bodies for Chemicals


	Round Rotating Plunger

Often found in tanks that are frequently washed down, these float valve bodies are 316 stainless steel, so they resist corroding from harsh cleaners. To create custom float valves, combine these valve bodies with floats and rods. Thread them onto pipe to direct water to a specific location. They’re frequently used to send water to the bottom of a tank to limit splashing and disruptions at the surface level. When the valve opens and closes, the plunger rotates freely. This means the internal seal wears evenly, extending the life of the valve body.

Teflon® PTFE Seal—Valve bodies with a Teflon® PTFE seal withstand higher temperatures than those with a Viton® fluoroelastomer seal.

	Inlet			Outlet									Viton® Fluoroelastomer Seal			Teflon® PTFE Seal
	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Flow Rate @ Pressure	Max. Pressure, psi	For Rod Thread Size	Material	Plunger Material	Plunger Type	Temp. Range, ° F		Each	Temp. Range, ° F		Each
90° Elbow



		1/2	NPT	Female	1/2	NPT	Female	48 gpm @ 50 psi	85	1/4"-20	316 Stainless Steel	316 Stainless Steel	Rotating	35 to 450	4531K54	0000000	35 to 550	4531K14	0000000


		3/4	NPT	Female	3/4	NPT	Female	48 gpm @ 50 psi	85	1/4"-20	316 Stainless Steel	316 Stainless Steel	Rotating	35 to 450	4531K56	000000	35 to 550	4531K16	000000
		1	NPT	Female	3/4	NPT	Female	57.5 gpm @ 50 psi	85	3/8"-16	316 Stainless Steel	316 Stainless Steel	Rotating	35 to 450	4531K59	000000	35 to 550	4531K19	000000
		1 1/4	NPT	Female	1 1/4	NPT	Female	140 gpm @ 50 psi	100	3/8"-16	316 Stainless Steel	316 Stainless Steel	Rotating	—	———	0	35 to 550	4531K21	00000000
		1 1/2	NPT	Female	1 1/2	NPT	Female	140 gpm @ 50 psi	100	3/8"-16	316 Stainless Steel	316 Stainless Steel	Rotating	—	———	0	35 to 550	4531K23	00000000
		2	NPT	Female	2	NPT	Female	140 gpm @ 50 psi	100	3/8"-16	316 Stainless Steel	316 Stainless Steel	Rotating	35 to 450	4531K65	00000000	35 to 550	4531K25	00000000

Through-Wall Vertical-Mount Float Switches for Chemicals

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 chemical 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 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