About Float Switches
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Choosing an Electrical Switch
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Harsh Environment Snap-Acting Switches
Open and close circuits in a snap—even in harsh conditions. With a rubber-encased housing and stainless steel bracket, these switches handle high vibrations and resist corrosion. They’re rated IP68 for protection from dust and temporary submersion. Because they open and close circuits faster than other switches—reducing the time that contacts are near one another—they prevent contacts from sticking. They also minimize the chance of arcing, so electricity won’t jump across contacts. They’re often used as door-open indicators on enclosures or as an internal component in limit, pressure, and temperature switches.
Roller lever actuator switches activate when parts glide front-to-back across their actuation surface. They produce less friction than standard levers, which prevents wear and tear over time.
Dual switch roller lever actuator switches actuate two SPDT switches simultaneously, giving you the equivalent of a DPDT switch. A roller at the end of the arm reduces friction and wear from parts moving across their actuation surface.
For technical drawings and 3-D models, click on a part number.
Wire Leads | Housing | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Max. Voltage  | Operating Temp. Range, °F | Actuator Ht. | Wire Connection Type | No. of | Lg. | Lg. | Ht. | Dp. | Lever Lg. | Each | ||
Bottom Mount | |||||||||||||||||
Roller Lever Actuator Style | |||||||||||||||||
| D | 1 | 1 Off (Normally Open) | Springs Back (Momentary) | SPST-NO | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 0.61" | Wire Leads | 2 | 24" | 1.75" | 0.34" | 1.75" | 2.2" | 00000000 | 0000000 |
| D | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 0.61" | Wire Leads | 3 | 24" | 1.75" | 0.34" | 1.75" | 2.2" | 0000000 | 00000 |
Dual Switch Roller Lever Actuator Style | |||||||||||||||||
| E | 2 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 0.6" | Wire Leads | 6 | 24" | 2.5" | 1.25" | 1.75" | 2.3" | 0000000 | 000000 |
Enclosed Washdown Snap-Acting Switches
Rated NEMA 4 and IP66, these enclosed switches have a sealed actuator for protection from washdowns. They open and close circuits quickly to minimize arcing and prevent contacts from sticking.
For technical drawings and 3-D models, click on a part number.
Housing | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Max. Voltage | Horsepower @ Switching Voltage | Operating Temp. Range, °F | Actuator Ht. | Wire Connection Type | No. of Terminals | Lg. | Ht. | Dp. | Conduit Trade Size | Lever Lg. | Each | ||
Bottom Mount | ||||||||||||||||||
Plunger Actuator Style | ||||||||||||||||||
| F | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 15 A @ 250 V AC, 0.5 A @ 125 V DC | 600V AC 250V DC | 1/4 hp @ 250 V AC | -25° to 160° | 1" | Screw Terminals | 3 | 1" | 1.75" | 3.04" | 1/2 | __ | 0000000 | 0000000 |
Lever Actuator Style | ||||||||||||||||||
| G | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 15 A @ 250 V AC, 0.5 A @ 125 V DC | 600V AC 250V DC | 1/4 hp @ 250 V AC | -25° to 160° | 2.1" | Screw Terminals | 3 | 1" | 1.75" | 3.04" | 1/2 | 6" | 0000000 | 000000 |
Roller Lever Actuator Style | ||||||||||||||||||
| H | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 15 A @ 250 V AC, 0.5 A @ 125 V DC | 600V AC 250V DC | 1/4 hp @ 250 V AC | -25° to 160° | 2.3" | Screw Terminals | 3 | 1" | 1.75" | 3.04" | 1/2 | 1.8" | 0000000 | 000000 |
Wobble Stick Actuator Style | ||||||||||||||||||
| J | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 15 A @ 250 V AC, 0.5 A @ 125 V DC | 600V AC 250V DC | 1/4 hp @ 250 V AC | -25° to 160° | 5.1" | Screw Terminals | 3 | 1" | 1.75" | 3.04" | 1/2 | __ | 0000000 | 000000 |
Enclosed Snap-Acting Switches
Enclosures protect these snap-acting switches from the environment. They open and close circuits quickly to minimize arcing and prevent contacts from sticking. They’re often used as door-open indicators on appliances and enclosures or as an internal component in limit, pressure, and temperature switches.
Switches with a roller plunger, cross roller plunger, or roller lever actuator allow parts to glide across the actuation surface with less friction than standard plungers or levers. This prevents wear and tear over time.
For technical drawings and 3-D models, click on a part number.
Housing | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Max. Voltage | Horsepower @ Switching Voltage | Operating Temp. Range, °F | Actuator Ht. | Wire Connection Type | No. of Terminals | Lg. | Ht. | Dp. | Conduit Trade Size | Lever Lg. | Each | ||
Bottom Mount | ||||||||||||||||||
Roller Lever Actuator Style | ||||||||||||||||||
| F | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 15 A @ 250 V AC, 0.5 A @ 125 V DC | 600V AC 250V DC | 1/4 hp @ 250 V AC | -25° to 160° | 1.8" | Screw Terminals | 3 | 3.04" | 1.75" | 1" | 1/2 | 1.8" | 0000000 | 0000000 |
Vertical-Mount Float Switches for Fuels and Oils
Mount these switches from outside the tank through a threaded connection. They activate process equipment such as pumps or motors when the diesel fuel, hydraulic fluid, or oil level in your tank reaches the float. Choose the switch with a stainless steel float for durability in harsh conditions.
Switches with splash guard minimize false switch activation caused by splashing liquid.
For technical drawings and 3-D models, click on a part number.
| Pipe Size | Thread Type | Gender | Min. Specific Gravity | Max. Pressure | Temp. Range, °F | Insertion Dp. | Switch Starting Position | Industry Designation | Current | Mounting Location | Float Ht. | Overall Dia. | Electrical Connection | Each | |
120V AC/240V AC Input Voltage | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Buna-N Rubber Float | |||||||||||||||
| 1/8 | NPT | Male | 0.45 | 150 psi @ 70° F | 35° to 250° | 1 9/16" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.17 A @ 120 V AC | Top, Bottom | 1" | 1" | Wire Leads | 00000000 | 000000 |
| 1/8 | NPT | Male | 0.55 | 150 psi @ 70° F | 35° to 145° | 1 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.28 A @ 120 V AC | Top, Bottom | 1" | 1" | Wire Leads | 00000000 | 00000 |
| 1/4 | NPT | Male | 0.55 | 150 psi @ 70° F | 35° to 145° | 2 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.5 A @ 120 V AC | Top, Bottom | 2" | 1 1/4" | Wire Leads | 00000000 | 00000 |
Buna-N Rubber Float with Splash Guard | |||||||||||||||
| 1/8 | NPT | Male | 0.55 | 150 psi @ 70° F | 35° to 145° | 1 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.28 A @ 120 V AC | Top, Bottom | 1" | 1 1/2" | Wire Leads | 00000000 | 00000 |
| 1/4 | NPT | Male | 0.55 | 150 psi @ 70° F | 35° to 145° | 2 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.5 A @ 120 V AC | Top, Bottom | 2" | 2" | Wire Leads | 00000000 | 00000 |
316 Stainless Steel Float | |||||||||||||||
| 1/8 | NPT | Male | 0.7 | 300 psi @ 70° F | 35° to 300° | 2 1/16" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.5 A @ 120 V AC | Top, Bottom | 1 3/16" | 1 1/8" | Wire Leads | 0000000 | 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.
For technical drawings and 3-D models, click on a part number.
Mounting | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min. Specific Gravity | Max. Pressure | Temp. Range, °F | Insertion Dp. | Switch Starting Position | Industry Designation | Current | Mounting Location | Float Ht. | Overall Dia. | Electrical Connection | Fasteners Included | No. of Holes | Hole Dia. | Each | |
120V AC/240V AC Input Voltage | |||||||||||||||
Buna-N Rubber Float | |||||||||||||||
| 0.55 | 150 psi @ 70° F | 35° to 140° | 3 3/16" | 1 Off (Normally Open) | SPST-NO | 0.17 A @ 120 V AC | Top, Bottom | 1 9/16" | 2 5/8" | Wire Leads | No | 2 | 9/32" | 0000000 | 0000000 |
| 0.55 | 150 psi @ 70° F | 35° to 140° | 3 3/16" | 1 Off (Normally Open) | SPST-NO | 0.4 A @ 120 V AC | Top, Bottom | 1 9/16" | 2 5/8" | Wire Leads | No | 2 | 9/32" | 0000000 | 000000 |
| 0.55 | 150 psi @ 70° F | 35° to 140° | 3 3/16" | 1 On (Normally Closed) | SPST-NC | 0.17 A @ 120 V AC | Top, Bottom | 1 9/16" | 2 5/8" | Wire Leads | No | 2 | 9/32" | 0000000 | 000000 |
| 0.55 | 150 psi @ 70° F | 35° to 140° | 3 3/16" | 1 On (Normally Closed) | SPST-NC | 0.4 A @ 120 V AC | Top, Bottom | 1 9/16" | 2 5/8" | Wire Leads | No | 2 | 9/32" | 0000000 | 000000 |
Vertical-Mount Float Switches for Water
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 the switch with a stainless steel float for durability in harsh conditions.
For technical drawings and 3-D models, click on a part number.
| Pipe Size | Thread Type | Gender | Min. Specific Gravity | Max. Pressure | Temp. Range, °F | Insertion Dp. | Switch Starting Position | Industry Designation | Current | Float Ht. | Overall Dia. | Electrical Connection | Each | |
120V AC/240V AC Input Voltage | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Buna-N Rubber Float | ||||||||||||||
| 1/8 | NPT | Male | 0.45 | 50 psi @ 70° F | 35° to 150° | 1 7/8" | 1 On (Normally Closed) | SPST-NC | 0.17 A @ 120 V AC | 1 1/16" | 1 7/8" | Wire Leads | 00000000 | 000000 |
Polypropylene Plastic Float | ||||||||||||||
| 1/8 | NPT | Male | 0.6 | 50 psi @ 70° F | 35° to 225° | 1 9/16" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.17 A @ 120 V AC | 1" | 1" | Wire Leads | 00000000 | 00000 |
| 1/8 | NPT | Male | 0.9 | 150 psi @ 70° F | 35° to 150° | 1 9/16" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.17 A @ 120 V AC | 1" | 1" | Wire Leads | 00000000 | 00000 |
| 1/8 | NPT | Male | 0.9 | 150 psi @ 70° F | 35° to 150° | 1 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.17 A @ 120 V AC | 1" | 3/4" | Wire Leads | 00000000 | 00000 |
CPVC Plastic Float | ||||||||||||||
| 1/4 | NPT | Male | 0.85 | 15 psi @ 70° F | 35° to 180° | 2 15/16" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.17 A @ 120 V AC | 1 13/16" | 1 1/2" | Wire Leads | 0000000 | 000000 |
316 Stainless Steel Float | ||||||||||||||
| 1/2 | NPT | Male | 0.35 | 300 psi @ 70° F | 35° to 300° | 4 13/16" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.83 A @ 120 V AC | 3 1/2" | 3 1/2" | Wire Leads | 0000000 | 000000 |
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.
For technical drawings and 3-D models, click on a part number.
| For Hole Dia. | Min. Specific Gravity | Max. Pressure | Temp. Range, °F | Insertion Dp. | Switch Starting Position | Industry Designation | Current | Float Ht. | Overall Dia. | Electrical Connection | Includes | Each | |
120V AC/240V AC Input Voltage | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Polypropylene Plastic Float | |||||||||||||
| 3/8" | 0.9 | 150 psi @ 70° F | 35° to 150° | 1 9/16" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.17 A @ 120 V AC | 1" | 1" | Wire Leads | Mounting Nut | 00000000 | 000000 |
Vertical-Mount Float Switches for Chemicals
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. Choose the switch with a stainless steel float for durability in harsh conditions.
Switches with splash guard minimize false switch activation caused by splashing liquid.
For technical drawings and 3-D models, click on a part number.
| Pipe Size | Thread Type | Gender | Min. Specific Gravity | Max. Pressure | Temp. Range, °F | Insertion Dp. | Switch Starting Position | Industry Designation | Current | Float Ht. | Overall Dia. | Electrical Connection | Each | |
120V AC/240V AC Input Voltage | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Polypropylene Plastic Float | ||||||||||||||
| 1/4 | NPT | Male | 0.85 | 100 psi @ 70° F | 35° to 220° | 2 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.5 A @ 120 V AC | 2" | 1 1/2" | Wire Leads | 00000000 | 000000 |
| 1/4 | NPT | Male | 0.85 | 100 psi @ 70° F | 35° to 220° | 2 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 1 A @ 120 V AC | 2" | 1 1/2" | Wire Leads | 00000000 | 00000 |
Polypropylene Plastic Float with Splash Guard | ||||||||||||||
| 1/8 | NPT | Male | 0.9 | 100 psi @ 70° F | 35° to 220° | 1 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.3 A @ 120 V AC | 1" | 1 1/2" | Wire Leads | 00000000 | 00000 |
| 1/4 | NPT | Male | 0.85 | 100 psi @ 70° F | 35° to 220° | 2 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.5 A @ 120 V AC | 2" | 2" | Wire Leads | 00000000 | 00000 |
PVDF Plastic Float with Splash Guard | ||||||||||||||
| 1/8 | NPT | Male | 0.95 | 15 psi @ 70° F | 35° to 220° | 1 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.3 A @ 120 V AC | 1" | 1 1/2" | Wire Leads | 00000000 | 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 (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.5 A @ 120 V AC | 2 1/8" | 2 3/8" | Wire Leads | 0000000 | 000000 |
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.
For technical drawings and 3-D models, click on a part number.
| For Hole Dia. | Min. Specific Gravity | Max. Pressure | Temp. Range, °F | Insertion Dp. | Switch Starting Position | Industry Designation | Current | Float Ht. | Overall Dia. | Electrical Connection | Includes | Each | |
120V AC Input Voltage | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Polypropylene Plastic Float | |||||||||||||
| 3/8" | 0.7 | 50 psi @ 70° F | 35° to 220° | 1 1/4" | 1 Off (Normally Open) | SPST-NO | 0.12 A @ 120 V AC | 5/8" | 9/16" | Wire Leads | Mounting Nut | 00000000 | 000000 |
| 3/8" | 0.7 | 50 psi @ 70° F | 35° to 220° | 1 1/4" | 1 On (Normally Closed) | SPST-NC | 0.12 A @ 120 V AC | 5/8" | 9/16" | Wire Leads | Mounting Nut | 00000000 | 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. Choose the switch with a stainless steel float for durability in harsh conditions.
For technical drawings and 3-D models, click on a part number.
| Min. Specific Gravity | Max. Pressure | Temp. Range, °F | Insertion Dp. | Switch Starting Position | Industry Designation | Current | Float Ht. | Overall Dia. | Each | |
120V AC/240V AC Input Voltage | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Polypropylene Plastic Float with Splash Guard | ||||||||||
| 0.85 | 100 psi @ 70° F | 35° to 220° | 3 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.5 A @ 120 V AC | 2" | 2 1/2" | 0000000 | 0000000 |
316 Stainless Steel Float with Splash Guard | ||||||||||
| 0.65 | 85 psi @ 70° F | 35° to 230° | 3 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.5 A @ 120 V AC | 2" | 2 1/2" | 0000000 | 000000 |
Vertical-Mount Float Switches for Food and Beverage
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.
For technical drawings and 3-D models, click on a part number.
Float Switches | Replacement Floats | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Thread Type | Gender | Min. Specific Gravity | Max. Pressure | Temp. Range, °F | Insertion Dp. | Switch Starting Position | Industry Designation | Current | Float Ht. | O'all Dia. | Each | Each | |||
120V AC/240V AC Input Voltage—Wire Leads | ||||||||||||||||
Polypropylene Plastic Float | ||||||||||||||||
| A | 1/8 | NPT | Male | 0.9 | 100 psi @ 70° F | 35° to 220° | 1 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.28 A @ 120 V AC | 1" | 1" | 00000000 | 000000 | 00000000 | 000000 |
| A | 1/4 | NPT | Male | 0.87 | 100 psi @ 70° F | 35° to 220° | 2 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.5 A @ 120 V AC | 2" | 1 1/2" | 00000000 | 00000 | 00000000 | 00000 |
PVDF Plastic Float | ||||||||||||||||
| A | 1/8 | NPT | Male | 0.85 | 15 psi @ 70° F | 35° to 220° | 1 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.28 A @ 120 V AC | 1" | 1" | 00000000 | 00000 | 00000000 | 00000 |
316 Stainless Steel Float | ||||||||||||||||
| B | 1/8 | NPT | Male | 0.8 | 300 psi @ 70° F | 35° to 390° | 1 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.28 A @ 120 V AC | 1 3/16" | 1 1/8" | 0000000 | 00000 | 0000000 | 00000 |
| B | 1/4 | NPT | Male | 0.65 | 200 psi @ 70° F | 35° to 390° | 2 15/16" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.5 A @ 120 V AC | 2 1/8" | 2 1/8" | 0000000 | 00000 | 0000000 | 00000 |
| B | 1/4 | NPT | Male | 0.65 | 200 psi @ 70° F | 35° to 480° | 2 15/16" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.5 A @ 120 V AC | 2 1/8" | 2 1/8" | 0000000 | 00000 | 0000000 | 00000 |
| C | 1/4 | NPT | Male | 0.8 | 500 psi @ 70° F | 35° to 390° | 2 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 1 A @ 120 V AC | 2 1/16" | 2 1/16" | 0000000 | 000000 | 0000000 | 00000 |
| C | 1/4 | NPT | Male | 0.8 | 750 psi @ 70° F | 35° to 300° | 2 7/8" | 1 Off (Normally Open)/1 On (Normally Closed) | SPST-NO SPST-NC | 0.83 A @ 120 V AC | 2 1/16" | 2 1/16" | 0000000 | 000000 | 0000000 | 00000 |