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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The FS8000 Series Inline Flow Switch from Madison Company is a high-performance, compact solution designed for accurate and reliable flow detection in demanding applications. Built with a clog-resistant, non-adjustable design, the FS8000 ensures consistent switching performance and minimal pressure drop, making it ideal for systems where flow precision and durability are critical.
The Madison FS8000 is engineered to deliver dependable flow monitoring in compact spaces, where accuracy, ease of use, and maintenance-free operation are essential.
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Continuous Level, SS Stem, PP Float, 1/4'' Resolution, 4-20mA Output, 16'' Sense Length, 1 1/2'' PP Fitting, 24'' Leads, 0.5" Top Deadband, 2.13" Bottom Deadband
$517.33$649.00
In Stock (20)Ships within 1 business day
Continuous Level, SS Stem, SS Float, 1/4'' Resolution, 4-20mA Output, 21.13'' Sense Length, 2'' PP Fitting, 24'' Leads, 1.19" Top Deadband, 1.69" Bottom Deadband
$656.03$823.00
Low Stock (3)Ships within 1 business day
Continuous Level, SS Stem, Buna Float, 1/4'' Resolution, 4-20mA Output, 29.38'' Sense Length, 2'' PP Fitting, 24'' Leads, 1.13" Top Deadband, 1.5" Bottom Deadband
$710.23$891.00
In Stock (7)Ships within 1 business day
Kit, 4th Level for ML4444, Blue Leads
$167.40$210.00
Available for Purchase
Subject to factory lead times
Kit, 3rd and 4th Levels for ML4444, White and Blue Leads
$334.79$420.00
Available for Purchase
Subject to factory lead times
Miniature Liquid Level Switch, Teflon Stem, Stainless Steel Float, with 1/8" NPT and 24" Leads
$148.27$186.00
In Stock (39)Ships within 1 business day
SIDE MOUNTED KYNAR LLS, 2 THREADS, 1/2" NPT
$38.27$48.00
In Stock (203)Ships within 1 business day
MULTI-LEVEL KIT, Full Size, Buna Float and 2" NPT Brass Stem, 2 Levels, 43 1/8" Max. Length
$361.10$453.00
In Stock (20)Ships within 1 business day
Kit, 3rd Level for ML4444, White Leads
$167.40$210.00
Available for Purchase
Subject to factory lead times
MULTI-LEVEL KIT, Full Size, 316 Stainless Steel Float and 2" NPT Stem, 2 Levels, 43 1/8" Max. Length
$598.64$751.00
In Stock (20)Ships within 1 business day
Kit, 3rd Level for ML5555, White Leads
$271.82$341.00
Available for Purchase
Subject to factory lead times
Kit, 4th Level for ML5555, Blue Leads
$271.82$341.00
Available for Purchase
Subject to factory lead times
Kit, 3rd and 4th Levels for ML5555, White and Blue Leads
$543.64$682.00
Available for Purchase
Subject to factory lead times
MULTI-LEVEL KIT, Full Size, Polypropylene Float and Polypropylene Stem, 2 Levels
$403.35$506.00
In Stock (26)Ships within 1 business day
Kit, 3rd Level for ML8888, White Leads
$94.86$119.00
Available for Purchase
Subject to factory lead times
Kit, 4th Level for ML8888, Blue Leads
$94.86$119.00
Available for Purchase
Subject to factory lead times
Kit, 3rd and 4th Levels for ML8888, White and Blue Leads
$189.72$238.00
Available for Purchase
Subject to factory lead times
M5000 with SLOSH SHIELD
$121.96$153.00
Available for Purchase
Subject to factory lead times
Panel Meter, Process and Temperature with 24 VDC Output, 110 VAC Input, 0.56'' High, 4 Digit Display, No Relays - Certifications: First Article Inspection REQUIRED with the initial order
Requires Quote
Available for Purchase
Subject to factory lead times
Panel Meter, Process and Temperature with 24 VDC Output, 110 VAC Input, 0.56'' High, 4 Digit Display, 2 Relays - Certifications: First Article Inspection REQUIRED with the initial order
Requires Quote
Available for Purchase
Subject to factory lead times
Panel Meter, Process with 24 VDC Output, 24/12 VDC Power Input, Dual-Line 6-Digit Display, 2 Relays - Certifications: First Article Inspection REQUIRED with the initial order
Requires Quote
Available for Purchase
Subject to factory lead times
Panel Meter, Process with 24 VDC Output, 110 VAC Input, Dual-Line 6-Digit Display, 2 Relays
Requires Quote
Available for Purchase
Subject to factory lead times
PUMP-UP/DOWN CONTROLLER, 120 VAC INPUT, SPDT OUTPUT 10A/120VAC RESISTIVE LOAD
$0.00$273.00
Low Stock (5)Ships within 1 business day
Configure product to see pricing
The FS8000 Series Inline Flow Switch from Madison Company is a high-performance, compact solution designed for accurate and reliable flow detection in demanding applications. Built with a clog-resistant, non-adjustable design, the FS8000 ensures consistent switching performance and minimal pressure drop, making it ideal for systems where flow precision and durability are critical.
The Madison FS8000 is engineered to deliver dependable flow monitoring in compact spaces, where accuracy, ease of use, and maintenance-free operation are essential.
Configure Product
Configure product to see pricing
Continuous Level, SS Stem, PP Float, 1/4'' Resolution, 4-20mA Output, 16'' Sense Length, 1 1/2'' PP Fitting, 24'' Leads, 0.5" Top Deadband, 2.13" Bottom Deadband
$517.33$649.00
In Stock (20)Ships within 1 business day
Continuous Level, SS Stem, SS Float, 1/4'' Resolution, 4-20mA Output, 21.13'' Sense Length, 2'' PP Fitting, 24'' Leads, 1.19" Top Deadband, 1.69" Bottom Deadband
$656.03$823.00
Low Stock (3)Ships within 1 business day
Continuous Level, SS Stem, Buna Float, 1/4'' Resolution, 4-20mA Output, 29.38'' Sense Length, 2'' PP Fitting, 24'' Leads, 1.13" Top Deadband, 1.5" Bottom Deadband
$710.23$891.00
In Stock (7)Ships within 1 business day
Kit, 4th Level for ML4444, Blue Leads
$167.40$210.00
Available for Purchase
Subject to factory lead times
Kit, 3rd and 4th Levels for ML4444, White and Blue Leads
$334.79$420.00
Available for Purchase
Subject to factory lead times
Miniature Liquid Level Switch, Teflon Stem, Stainless Steel Float, with 1/8" NPT and 24" Leads
$148.27$186.00
In Stock (39)Ships within 1 business day
SIDE MOUNTED KYNAR LLS, 2 THREADS, 1/2" NPT
$38.27$48.00
In Stock (203)Ships within 1 business day
MULTI-LEVEL KIT, Full Size, Buna Float and 2" NPT Brass Stem, 2 Levels, 43 1/8" Max. Length
$361.10$453.00
In Stock (20)Ships within 1 business day
Kit, 3rd Level for ML4444, White Leads
$167.40$210.00
Available for Purchase
Subject to factory lead times
MULTI-LEVEL KIT, Full Size, 316 Stainless Steel Float and 2" NPT Stem, 2 Levels, 43 1/8" Max. Length
$598.64$751.00
In Stock (20)Ships within 1 business day
Kit, 3rd Level for ML5555, White Leads
$271.82$341.00
Available for Purchase
Subject to factory lead times
Kit, 4th Level for ML5555, Blue Leads
$271.82$341.00
Available for Purchase
Subject to factory lead times
Kit, 3rd and 4th Levels for ML5555, White and Blue Leads
$543.64$682.00
Available for Purchase
Subject to factory lead times
MULTI-LEVEL KIT, Full Size, Polypropylene Float and Polypropylene Stem, 2 Levels
$403.35$506.00
In Stock (26)Ships within 1 business day
Kit, 3rd Level for ML8888, White Leads
$94.86$119.00
Available for Purchase
Subject to factory lead times
Kit, 4th Level for ML8888, Blue Leads
$94.86$119.00
Available for Purchase
Subject to factory lead times
Kit, 3rd and 4th Levels for ML8888, White and Blue Leads
$189.72$238.00
Available for Purchase
Subject to factory lead times
M5000 with SLOSH SHIELD
$121.96$153.00
Available for Purchase
Subject to factory lead times
Panel Meter, Process and Temperature with 24 VDC Output, 110 VAC Input, 0.56'' High, 4 Digit Display, No Relays - Certifications: First Article Inspection REQUIRED with the initial order
Requires Quote
Available for Purchase
Subject to factory lead times
Panel Meter, Process and Temperature with 24 VDC Output, 110 VAC Input, 0.56'' High, 4 Digit Display, 2 Relays - Certifications: First Article Inspection REQUIRED with the initial order
Requires Quote
Available for Purchase
Subject to factory lead times
Panel Meter, Process with 24 VDC Output, 24/12 VDC Power Input, Dual-Line 6-Digit Display, 2 Relays - Certifications: First Article Inspection REQUIRED with the initial order
Requires Quote
Available for Purchase
Subject to factory lead times
Panel Meter, Process with 24 VDC Output, 110 VAC Input, Dual-Line 6-Digit Display, 2 Relays
Requires Quote
Available for Purchase
Subject to factory lead times
PUMP-UP/DOWN CONTROLLER, 120 VAC INPUT, SPDT OUTPUT 10A/120VAC RESISTIVE LOAD
$0.00$273.00
Low Stock (5)Ships within 1 business day