Float Switches
Float switches are one of the simplest and most dependable ways to sense liquid level. A buoyant float rises and falls with the liquid and opens or closes a switch at a set point to start a pump, stop a fill or trigger a high or low level alarm.
Float Switch Types
- Tethered cable floats – wide switching range for sumps and wastewater
- Vertical stem floats – compact, precise point level in tanks
- Side-mount floats – install through the tank wall
- Multi-point float switches – several level points on one stem
- Sanitary and chemical-resistant floats – stainless, PVDF and polypropylene
Choosing a Float Switch
Consider the liquid's specific gravity, temperature and chemical makeup, along with the tank's size and mounting options. Check the switch rating against the load. Many pumps need a relay or motor control panel. Avoid using floats in turbulent or heavily coated liquids unless they're designed for it.
Centro offers float switches for water, wastewater, chemical and process tanks, and can help you match material and mounting to your application.
Related categories: Liquid Level | Level Transmitters | Float Switch | Radar | Differential Pressure Control
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Micro Miniature Liquid Level Switch, Polypropylene Float, Polypropylene Stem, Normally Closed
$33.48$42.00
In Stock (309)Ships within 1 business day
Micro Miniature Liquid Level Switch, Polypropylene Float, Polypropylene Stem, Normally Open
$31.48$42.00
In Stock (541)Ships within 1 business day
Micro Miniature Liquid Level Switch with 1/8'' NPT, Polypropylene Float, Polypropylene Stem, Normally Closed
$37.47$47.00
Available for Purchase
Subject to factory lead times
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Micro Miniature Liquid Level Switch with 1/8'' NPT, Polypropylene Float, Polypropylene Stem, Normally Open
$37.47$47.00
Available for Purchase
Subject to factory lead times
INTERSTITIAL SWITCH, PBT Housing, Buna Float, 10 Foot Cable
$133.12$167.00
Available for Purchase
Subject to factory lead times
Single Level, Suspendable, Submersible LLS, Brass Stem, Buna Float with 20 Foot Cable and Watertight Fitting, Normally Closed
$119.38$156.00
In Stock (79)Ships within 1 business day
CONDUCTIVITY SWITCH KIT WITH 110 VAC CONTROLLER, POLYPRO, 1 INCH NPT
$434.43$545.00
Available for Purchase
Subject to factory lead times
Side Mounted Liquid Level Switch, Stainless Steel Stem and Float with 1/2 NPT Fitting, Normally Closed
$165.80$208.00
In Stock (8)Ships within 1 business day
Side Mounted Liquid Level Switch, Stainless Steel Stem and Float with 1/2 NPT Fitting, Normally Open
$165.80$208.00
In Stock (17)Ships within 1 business day
Miniature Float Switch, Brass Stem, Buna Float, 3/8-24 Bulkhead Fitting, Bent Stem
$73.34$92.00
Available for Purchase
Subject to factory lead times
Miniature Float Switch, Brass Stem, Buna Float, 1/8" NPT Fitting, Bent Stem
$73.34$92.00
Available for Purchase
Subject to factory lead times
Miniature, Multi Level Liquid Level Switch, Stainless Steel Stem, 0.90" OD Stainless Steel Float, 3/4" Pipe Plug, 2" Stem Length, 1 Level, 72" Cable Leads, 30 Watt Switch, High Level, Normally Open
$177.53$232.00
In Stock (10)Ships within 1 business day
Miniature, Multi Level Liquid Level Switch, Stainless Steel Stem, 0.90" OD Stainless Steel Float, 3/4" Pipe Plug, 32" Stem Length, 1 Level, 72" Cable Leads, 30 Watt Switch, Low Level, Normally Closed
$200.88$252.00
Available for Purchase
Subject to factory lead times
Miniature, Multi Level Liquid Level Switch, Stainless Steel Stem, 0.90" OD Stainless Steel Float, 3/4" Pipe Plug, 32" Stem Length, 2 Levels, 72" Cable Leads, 30 Watt Switch, High / Low Levels, Normally Open / Normally Closed
$334.79$420.00
Available for Purchase
Subject to factory lead times
Tilt Float Switch, Red Polypro Housing, Rectangular Shaped, 18 AWG, 3 Conductor PVC Jacketed Cable, 2 Meters Long (+/- 5% of Length), SPDT Switch
$40.66$51.00
In Stock (82)Ships within 1 business day
Tilt Float Switch, Red Polypro Housing, Rectangular Shaped, 18 AWG, 3 Conductor PVC Jacketed Cable, 15 Meters Long (+/- 5% of Length), SPDT Switch
$62.18$78.00
In Stock (124)Ships within 1 business day
Side Mounted Liquid Level Switch, 1'' NPT x 1/2'' NPT, 304 Stainless Steel, Cam Actuated
$288.56$362.00
In Stock (6)Ships within 1 business day
Side Mounted Liquid Level Switch, 1'' NPT x 1/2'' NPT, 304 Stainless Steel, Cam Actuated
$243.13$305.00
In Stock (9)Ships within 1 business day
Side Mounted Liquid Level Switch, 1'' NPT x 1/2'' NPT, 304 Stainless Steel, Cam Actuated
$342.76$430.00
Low Stock (4)Ships within 1 business day
STD FS LLS BR STEM BUNA FLOAT
$45.72$61.00
In Stock (229)Ships within 1 business day
Miniature Float Switch, SS Stem, Buna Float, 1/8" NPT Fitting
$56.60$71.00
In Stock (23)Ships within 1 business day
Miniature Float Switch, SS Stem, Buna Float, 3/8-24 Bulkhead Fitting, Bent Stem
$73.34$92.00
Low Stock (3)Ships within 1 business day
Miniature Float Switch, SS Stem, Buna Float, 1/8' NPT Fitting, Bent Stem
$73.34$92.00
Available for Purchase
Subject to factory lead times
STD MIN LLS BR STEM BUNA FLOAT
$40.66$51.00
In Stock (368)Ships within 1 business day
Micro Miniature Liquid Level Switch, Polypropylene Float, Polypropylene Stem, Normally Closed
$33.48$42.00
In Stock (309)Ships within 1 business day
Micro Miniature Liquid Level Switch, Polypropylene Float, Polypropylene Stem, Normally Open
$31.48$42.00
In Stock (541)Ships within 1 business day
Micro Miniature Liquid Level Switch with 1/8'' NPT, Polypropylene Float, Polypropylene Stem, Normally Closed
$37.47$47.00
Available for Purchase
Subject to factory lead times
Micro Miniature Liquid Level Switch with 1/8'' NPT, Polypropylene Float, Polypropylene Stem, Normally Open
$37.47$47.00
Available for Purchase
Subject to factory lead times
INTERSTITIAL SWITCH, PBT Housing, Buna Float, 10 Foot Cable
$133.12$167.00
Available for Purchase
Subject to factory lead times
Single Level, Suspendable, Submersible LLS, Brass Stem, Buna Float with 20 Foot Cable and Watertight Fitting, Normally Closed
$119.38$156.00
In Stock (79)Ships within 1 business day
CONDUCTIVITY SWITCH KIT WITH 110 VAC CONTROLLER, POLYPRO, 1 INCH NPT
$434.43$545.00
Available for Purchase
Subject to factory lead times
Side Mounted Liquid Level Switch, Stainless Steel Stem and Float with 1/2 NPT Fitting, Normally Closed
$165.80$208.00
In Stock (8)Ships within 1 business day
Side Mounted Liquid Level Switch, Stainless Steel Stem and Float with 1/2 NPT Fitting, Normally Open
$165.80$208.00
In Stock (17)Ships within 1 business day
Miniature Float Switch, Brass Stem, Buna Float, 3/8-24 Bulkhead Fitting, Bent Stem
$73.34$92.00
Available for Purchase
Subject to factory lead times
Miniature Float Switch, Brass Stem, Buna Float, 1/8" NPT Fitting, Bent Stem
$73.34$92.00
Available for Purchase
Subject to factory lead times
Miniature, Multi Level Liquid Level Switch, Stainless Steel Stem, 0.90" OD Stainless Steel Float, 3/4" Pipe Plug, 2" Stem Length, 1 Level, 72" Cable Leads, 30 Watt Switch, High Level, Normally Open
$177.53$232.00
In Stock (10)Ships within 1 business day
Miniature, Multi Level Liquid Level Switch, Stainless Steel Stem, 0.90" OD Stainless Steel Float, 3/4" Pipe Plug, 32" Stem Length, 1 Level, 72" Cable Leads, 30 Watt Switch, Low Level, Normally Closed
$200.88$252.00
Available for Purchase
Subject to factory lead times
Miniature, Multi Level Liquid Level Switch, Stainless Steel Stem, 0.90" OD Stainless Steel Float, 3/4" Pipe Plug, 32" Stem Length, 2 Levels, 72" Cable Leads, 30 Watt Switch, High / Low Levels, Normally Open / Normally Closed
$334.79$420.00
Available for Purchase
Subject to factory lead times
Tilt Float Switch, Red Polypro Housing, Rectangular Shaped, 18 AWG, 3 Conductor PVC Jacketed Cable, 2 Meters Long (+/- 5% of Length), SPDT Switch
$40.66$51.00
In Stock (82)Ships within 1 business day
Tilt Float Switch, Red Polypro Housing, Rectangular Shaped, 18 AWG, 3 Conductor PVC Jacketed Cable, 15 Meters Long (+/- 5% of Length), SPDT Switch
$62.18$78.00
In Stock (124)Ships within 1 business day
Side Mounted Liquid Level Switch, 1'' NPT x 1/2'' NPT, 304 Stainless Steel, Cam Actuated
$288.56$362.00
In Stock (6)Ships within 1 business day
Side Mounted Liquid Level Switch, 1'' NPT x 1/2'' NPT, 304 Stainless Steel, Cam Actuated
$243.13$305.00
In Stock (9)Ships within 1 business day
Side Mounted Liquid Level Switch, 1'' NPT x 1/2'' NPT, 304 Stainless Steel, Cam Actuated
$342.76$430.00
Low Stock (4)Ships within 1 business day
STD FS LLS BR STEM BUNA FLOAT
$45.72$61.00
In Stock (229)Ships within 1 business day
Miniature Float Switch, SS Stem, Buna Float, 1/8" NPT Fitting
$56.60$71.00
In Stock (23)Ships within 1 business day
Miniature Float Switch, SS Stem, Buna Float, 3/8-24 Bulkhead Fitting, Bent Stem
$73.34$92.00
Low Stock (3)Ships within 1 business day
Miniature Float Switch, SS Stem, Buna Float, 1/8' NPT Fitting, Bent Stem
$73.34$92.00
Available for Purchase
Subject to factory lead times
STD MIN LLS BR STEM BUNA FLOAT
$40.66$51.00
In Stock (368)Ships within 1 business day