Sump Pump Switches | McMaster-Carr

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About Float Switches

Heavy Duty Sewage Water
Switches for Sump Pumps

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

Dual Float Switches for Sump Pumps

If the primary float fails, the backup float kicks in and an alarm sounds to indicate float malfunction.

Pressure Switches for Sump Pumps

Since these switches activate on increasing pressure caused by rising water levels, they have no floats to catch on sump pit walls.

Float Switches for Sump Pumps

Hang these switches in a sump pit to detect rising water levels.

High Liquid-Level Alarms for Sump Pumps

An alarm and a red light alert you when water levels rise too high.

Level Switches for Water

Dual-Level Vertical-Mount Float Switches for Water

Empty and fill your tank with a single device—this dual-level switch includes two float switches that actuate at different levels. Mount through a threaded connection at the top of your tank.

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.

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.

Through-Wall Horizontal-Mount
Float Switches for Water

Mount these switches through an unthreaded hole in your tank wall and secure with a nut from outside the tank.

Horizontal-Mount Float Switches for Water

Install these switches into a threaded connection in your tank wall from outside the tank.

Drop-In Float Switches for Water

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

Hazardous Location Float Switches for Water

For use in locations with flammable gases and combustible dust, this switch is 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.

Float Switches for Fuels and Oils

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

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

Vertical-Mount Float Switches
with Bracket for Fuels and Oils

Use the included bracket to mount these switches to the inside of your tank.

Vertical-Mount Float Switches for Fuels and Oils

Mount these switches from outside the tank through a threaded connection.

Horizontal-Mount Float Switches for Fuels and Oils

Install these switches into a threaded connection in your tank wall from outside the tank.

Through-Wall Horizontal-Mount
Float Switches for Fuels and Oils

Mount these switches through an unthreaded hole in your tank wall and secure with a nut from outside the tank.

External-Mount Float Switches for Oils

For visual monitoring and easy access, these switches are housed in a clear acrylic reservoir that mounts to the outside of your tank.

Vertical-Mount Hazardous Location
Float Switches for Fuels and Oils

Horizontal-Mount Hazardous Location
Float Switches for Fuels and Oils

These switches are CSA certified for hazardous locations.

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

Mount this switch through the top of your tank.

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

Install these switches through a tank wall.

Level Switches for Chemicals

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.

Vertical-Mount Float Switches
with Brackets for Chemicals

Use the included bracket to mount these switches to the inside of your tank.

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.

Through-Wall Horizontal-Mount
Float Switches for Chemicals

Horizontal-Mount Float Switches for Chemicals

Install these switches into a threaded connection in your tank wall from outside the tank.

Hazardous Location Float Switches for Chemicals

Designed for use in areas where flammable substances are present, these switches are CSA certified for hazardous locations.

Float Switches for Food and Beverage

Vertical-Mount Float Switches
for Food and Beverage

Mount these switches into a threaded connection at the top or bottom of your tank.

Horizontal-Mount Float Switches
for Food and Beverage

Install these switches into a threaded connection in your tank wall from outside the tank.

Through-Wall Horizontal-Mount Float
Switches for Food and Beverage

Mount these switches through an unthreaded hole in your tank wall and secure with a nut from inside the tank.

Float Switches for Slurries and Thick Liquids

A polypropylene float makes these switches buoyant even in viscous liquids.