Pump Switches | McMaster-Carr

	For Use With For Use With

	Voltage Voltage

	Electrical Connection Type Electrical Connection Type

Plug

Wire Leads

	Cord Length Cord Length

4 ft.

15 ft.

	Current Current

	Switching Voltage Switching Voltage

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

1 On (Normally Closed)

2 On (Normally Closed)

	Maximum Setpoint Maximum Setpoint

	Housing Material Housing Material

Polypropylene Plastic

Polycarbonate Plastic

ABS Plastic

Plastic

	Input Voltage Input Voltage

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Maximum Temperature Maximum Temperature

100° F

122° F

140° F

	Minimum Temperature Minimum Temperature

	Switching Current Switching Current

	Industry Designation Industry Designation

	Cable Length Cable Length

	Float Diameter Float Diameter

	Wire Connection Type Wire Connection Type

	Number of Circuits Controlled Number of Circuits Controlled

	Operation Type Operation Type

Mechanical

Solid State

	Maximum Pressure Maximum Pressure

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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42 Products

About Sump, Water-Removal, Condensate, and Submersible Pumps

Choosing an Electrical Switch

About Pressure Switches

About Float Switches

Hang these switches in a sump pit to detect rising water levels. Use them to replace an existing switch, or pair them with a plug-in activated pump to control when the pump activates.

Voltage	Current, A	Max. Temp., °F	Plug Type	Cord Lg., ft.	Includes		Each
120V AC	13	140°	Three Prong	15	Stainless Steel Clamp	0000000	000000
240V AC	13	140°	Three Prong	15	Stainless Steel Clamp	0000000	00000

Heavy Duty Sewage Water Switches for Sump Pumps

Activate your pump in dirty water that contains sludge and sewage.

Voltage	Current, A	Temperature Range, °F	Plug Type	Cord Lg., ft.		Each
120V AC	13	35° to 140°	Three Prong	15	0000000	0000000

Dual Float Switches for Sump Pumps

If the primary float fails, the backup float kicks in and an alarm sounds to indicate float malfunction. The floats are enclosed in a mounting cage to minimize false switch activation. Use the switch to replace an existing switch, or pair it with a plug-in activated pump that operates on 15 amps or less to control when the pump activates.

Voltage	Current, A	Max. Temp., °F	Plug Type	Cord Lg., ft.	Features	Includes		Each
120V AC	12	100°	Three Prong	4	Mounting Cage	Stainless Steel Clamp	0000000	000000

Drop-In Float Switches for Water

Switch with ABS
Plastic Float and
Three-Prong Socket

Switch with
Polypropylene Float
and Adjustable Level

Hang these free-floating switches in your tank for water-level monitoring that doesn’t require installation through a tank wall.

Switches with three-prong socket allow you to plug your pump directly into the switch; the socket piggybacks to the three-prong plug. They’re often used to trigger an alarm.

Switches with adjustable level prevent excessive switch activation in tanks with fluctuating level. Adjust the set point by moving the weight along the cable or altering the cable length.

For technical drawings and 3-D models, click on a part number.

								Float
Cable Lg., ft.	Min. Specific Gravity	Max. Pressure	Temp. Range, °F	Switch Starting Position	Industry Designation	Current	Set Point	Dia.	Ht.	Electrical Connection	Plug Type	Specifications Met		Each
120V AC Input Voltage
Switches with ABS Plastic Float and Three-Prong Socket
9 1/2	1	20 psi @ 70° F	35° to 140°	1 Off (Normally Open)	SPST-NO	15 A @ 120 V AC	10"	2 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	000000
9 1/2	1	20 psi @ 70° F	35° to 140°	1 Off (Normally Open)	SPST-NO	15 A @ 120 V AC	10"	3 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	00000
9 1/2	1	20 psi @ 70° F	35° to 140°	1 On (Normally Closed)	SPST-NC	15 A @ 120 V AC	10"	2 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	00000
9 1/2	1	20 psi @ 70° F	35° to 140°	1 On (Normally Closed)	SPST-NC	15 A @ 120 V AC	10"	3 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	00000
19 1/2	1	20 psi @ 70° F	35° to 140°	1 Off (Normally Open)	SPST-NO	15 A @ 120 V AC	10"	2 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	00000
19 1/2	1	20 psi @ 70° F	35° to 140°	1 Off (Normally Open)	SPST-NO	15 A @ 120 V AC	10"	3 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	00000
19 1/2	1	20 psi @ 70° F	35° to 140°	1 On (Normally Closed)	SPST-NC	15 A @ 120 V AC	10"	2 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	00000
19 1/2	1	20 psi @ 70° F	35° to 140°	1 On (Normally Closed)	SPST-NC	15 A @ 120 V AC	10"	3 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	00000
29 1/2	1	20 psi @ 70° F	35° to 140°	1 Off (Normally Open)	SPST-NO	15 A @ 120 V AC	10"	2 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	00000
29 1/2	1	20 psi @ 70° F	35° to 140°	1 Off (Normally Open)	SPST-NO	15 A @ 120 V AC	10"	3 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	00000
29 1/2	1	20 psi @ 70° F	35° to 140°	1 On (Normally Closed)	SPST-NC	15 A @ 120 V AC	10"	2 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	00000
29 1/2	1	20 psi @ 70° F	35° to 140°	1 On (Normally Closed)	SPST-NC	15 A @ 120 V AC	10"	3 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	00000
49 1/2	1	20 psi @ 70° F	35° to 140°	1 Off (Normally Open)	SPST-NO	15 A @ 120 V AC	10"	2 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	000000
49 1/2	1	20 psi @ 70° F	35° to 140°	1 Off (Normally Open)	SPST-NO	15 A @ 120 V AC	10"	3 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	000000
49 1/2	1	20 psi @ 70° F	35° to 140°	1 On (Normally Closed)	SPST-NC	15 A @ 120 V AC	10"	2 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	000000
49 1/2	1	20 psi @ 70° F	35° to 140°	1 On (Normally Closed)	SPST-NC	15 A @ 120 V AC	10"	3 1/2"	3 1/4"	Plug	Three Prong	UL Listed	000000000	000000
250V AC/250V DC Input Voltage
Switches with Polypropylene Float and Adjustable Level
19 3/4	0.6	29 psi @ 70° F	32° to 140°	1 On (Normally Closed)	SPST-NC	0.5 A @ 120 V AC/DC	11"-39"	2 3/4"	4 1/4"	Wire Leads	__	__	00000000	000000
300V AC/300V DC Input Voltage
Switches with Polypropylene Float and Adjustable Level
19 3/4	0.7	29 psi @ 70° F	14° to 122°	1 Off (Normally Open)	SPST-NO	0.5 A @ 120 V AC/DC	11"-39"	2 3/4"	4 1/4"	Wire Leads	__	__	00000000	000000

Float Switches for Slurries and Thick Liquids

Float Switch

Float
Switch With
Adjustable Level

A polypropylene float makes these switches buoyant even in viscous liquids. Hang them in your tank for level monitoring that doesn’t require installation through a tank wall.

Switches with adjustable level prevent excessive switch activation in tanks with fluctuating level. Adjust the set point by moving the weight along the cable or altering the cable length.

For technical drawings and 3-D models, click on a part number.

								Float
Cable Lg., ft.	Min. Specific Gravity	Max. Pressure	Temp. Range, °F	Switch Starting Position	Industry Designation	Current	Set Point	Dia.	Ht.	Electrical Connection	Specifications Met		Each
120V AC/240V AC Input Voltage
Polypropylene Plastic Float
16	0.7	28 psi @ 70° F	15° to 140°	1 Off (Normally Open)	SPST-NO	6 A @ 120 V AC	10"	6 3/4"	6 1/8"	Wire Leads	CSA Certified	00000000	0000000
16	0.7	28 psi @ 70° F	15° to 140°	1 On (Normally Closed)	SPST-NC	6 A @ 120 V AC	10"	6 3/4"	6 1/8"	Wire Leads	CSA Certified	00000000	000000
16	0.95	28 psi @ 70° F	15° to 140°	1 Off (Normally Open)	SPST-NO	6 A @ 120 V AC	10"	3"	4 7/8"	Wire Leads	CSA Certified	00000000	000000
16	0.95	28 psi @ 70° F	15° to 140°	1 On (Normally Closed)	SPST-NC	6 A @ 120 V AC	10"	3"	4 7/8"	Wire Leads	CSA Certified	00000000	000000
Polypropylene Plastic Float with Adjustable Level
16	0.7	28 psi @ 70° F	15° to 140°	1 Off (Normally Open)	SPDT	6 A @ 120 V AC	10"-50"	6 3/4"	6 1/8"	Wire Leads	CSA Certified	00000000	000000
16	0.7	28 psi @ 70° F	15° to 140°	1 On (Normally Closed)	SPDT	6 A @ 120 V AC	10"-50"	6 3/4"	6 1/8"	Wire Leads	CSA Certified	00000000	000000
16	0.95	28 psi @ 70° F	15° to 140°	1 Off (Normally Open)	SPDT	6 A @ 120 V AC	10"-40"	3"	4 7/8"	Wire Leads	CSA Certified	00000000	000000
16	0.95	28 psi @ 70° F	15° to 140°	1 On (Normally Closed)	SPDT	6 A @ 120 V AC	10"-40"	3"	4 7/8"	Wire Leads	CSA Certified	00000000	000000

Medium-Pressure Switches for Well Water Pumps

Switch

For Use With: Water
Connection Material: Steel
Connection: NPT Female
Switching Current: 24A/34A
Switching Voltage: 120V AC/240V AC

These switches meet the pressure and electrical requirements of well water pumps. They electrically activate automated controls or alarms when a set pressure is reached. Switches are double pole, single throw and normally closed (DPST-NC), so they switch two circuits from on to off.

					Temperature Range, °F		Conduit
Setpoint, psi	Approximate Difference Between Setpoint and Reset Point, psi	Max. Pressure, psi	Accuracy	Pipe Size	Environment	Process	For Trade Size	Connection Gender	Specifications Met		Each
Polycarbonate Plastic Housing
1-12	4	200	±5%	1/4	-30° to 160°	-30° to 210°	1/2	Female	CSA Certified, UL Listed	00000000	000000
3-35	10	200	±5%	1/4	-30° to 160°	-30° to 210°	1/2	Female	CSA Certified, UL Listed	00000000	00000
5-65	22	200	±5%	1/4	-30° to 160°	-30° to 210°	1/2	Female	CSA Certified, UL Listed	00000000	00000
5-80	22	200	±5%	1/4	-30° to 160°	-30° to 210°	1/2	Female	CSA Certified, UL Listed	00000000	00000

Tilt Switches

Often used as position indicators, pump level controls, and machine limit switches, these switches actuate when tilted to a certain angle. They mount horizontally and activate when tilted downward, and deactivate when tilted up. Differential angle is the total angle from the point of activation to the point of deactivation. All combine electromechanical and solid state technologies for reliability and long life.

For technical drawings and 3-D models, click on a part number.

With Ring Terminals
	No. of Circuits Controlled	Switch Starting Position	Industry Designation	Switching Current @ Voltage	Max. Voltage	Differential Angle	No. of Wire Leads	Dia.	Lg.	Ht.	Dp.	Housing Material	Environmental Rating		Each
A	1	1 Off (Normally Open)	SPST-NO	0.1 A @ 120 V AC, 0.25 A @ 24 V DC	60V DC/120V AC	15°	2	0.53"	1.88"	__	__	Plastic	NEMA 4, IP67	000000	000000
With Spade Terminals
A	1	1 Off (Normally Open)	SPST-NO	2.5 A @ 120 V AC	280V AC	15°	2	0.53"	1.88"	__	__	Plastic	NEMA 4, IP67	000000	00000
With Wire Leads
B	1	1 Off (Normally Open)	SPST-NO	20 A @ 24 V DC	40V DC	10°	2	0.75"	2"	__	__	Plastic	NEMA 4, IP67	000000	00000
C	1	1 Off (Normally Open)	SPST-NO	10 A @ 12 V DC	18V DC	30°	2	__	1.22"	1.07"	0.8"	Plastic	NEMA 4, IP67	000000	00000
D	1	1 Off (Normally Open)	SPST-NO	15 A @ 120 V AC	120V AC	15°	3	__	3"	1.5"	2"	Plastic	NEMA 4, IP67	000000	000000
D	1	1 Off (Normally Open)	SPST-NO	15 A @ 220 V AC	220V AC	15°	3	__	3"	1.5"	2"	Plastic	NEMA 4, IP67	000000	000000
E	1	1 On (Normally Closed)	SPST-NC	2 A @ 120 V AC	220V AC	25°	2	__	1.5"	0.8"	1.3"	Plastic	NEMA 4, IP67	000000	00000
E	1	1 On (Normally Closed)	SPST-NC	2 A @ 120 V AC	220V AC	40°	2	__	1.5"	0.8"	1.3"	Plastic	NEMA 4, IP67	000000	00000