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Float switches provide a low-cost solution for liquid level monitoring. Shock and vibration resistant, the float operates a reed switch via magnets as the liquid level moves the float. Various models offer compatibility with many liquids, temperature ranges, and system pressures.
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Float Level Switches
Category Selection
Float level switches provide a low-cost general-purpose solution for single point monitoring of liquid level in a variety of applications. Designed for shock and vibration resistance, ProSense float level switches ensure long and trouble-free service.
- Available in several material constructions for compatibility with many liquid types
- Vertical and horizontal mounting styles offer flexible mounting with a variety of process connections
- Operating temperature ratings up to 482°F
- Suitable for a wide range of system pressure requirements
- Reed switches offer both AC and DC voltage ratings
- Most models are field configurable for N.O. or N.C. operation
For part listings and specifications, go to Shop Now
Vertical Top-Mount Float Level Switches
Vertical float switches are mounted at the top or bottom of a tank or vessel and have a float that rises or falls along the stem. Magnets within the float actuate a hermetically sealed reed switch as the float rises and lowers with liquid level.
- Float materials: Polypropylene, Buna-N, 316SS, Kynar, and PTFE
- Stem materials: Polypropylene, PBT, Brass, 316SS, Kynar and PFTE
- 3/8-16 UNC, 1/8" MNPT or 1/4" MNPT mounting threads
- Temperature ranges from -40°F to 482°F (depending on model)
- Pressure ratings up to 500 psig (depending on model)
Starting at
$14.50
(FLS-VM-100)
Vertical Suspendible / Submersible Float Level Switch
The FLS-VL-900 submersible liquid level switch is weighted for suspension in non-magnetic tanks and can be used in conjunction with a still pipe. Its materials are suitable for water, hydrocarbons, and certain chemicals.
- Buna-N float with brass stem
- PBT slosh shield for accurate sensing in turbulent conditions
- 20 ft. suspendible cable mounting
- -40°F to 221°F temperature range
- 50 psig max operating pressure
Starting at
$136.00
(FLS-VL-900)
55 Gallon Drum Float Level Switches
These high- and/or low-level indication switches are specifically designed for standard 55-gallon drums and mount directly to standard 3/4" NPT bungs.
- Models in 316 stainless steel, or Buna-N float with brass stem
- Single- and dual-float models
- 72" lead wires
- Temperature ranges from -40°F to 302°F (depending on model)
- Pressure ratings up to 250 psig (depending on model)
Starting at
$112.00
(FLS-VD-100)
HVAC Condensate Line Float Level Switch
The FLS-VM-800 float switch features a 3/4” PVC pipe fitting process connection and is ideal for use in HVAC condensate lines.
- Polypropylene float with PVC stem
- -40°F to 140°F operating temperature range
- 50 psig max operating pressure
- 24" lead wires
Starting at
$21.50
(FLS-VM-800)
Horizontal Side-Mount Float Level Switches
Horizontal/side-mounted float switches have a fixed housing which is passed through a hole on the side of a vessel or tank. They operate via a hinged float that rises and falls with the liquid level.
- Float materials: Polypropylene, PBT, 316SS, Kynar, Buna-N, and PFTE
- Stem materials: Polypropylene, PBT, 304SS, 316SS, and Kynar
- Available in a variety of mounting threads
- Temperature ranges from -40°F to 392°F (depending on model)
- Pressure ratings up to 300 psig (depending on model)
Starting at
$17.00
(FLS-HS-100)
Float Level Switch Kits
ProSense float level switch kits provide a convenient, field-customizable two-float level switch with a maximum stem length of 36 inches (914.4 mm). The kits are available in brass or 316 stainless steel constructions for compatibility with different liquids. Each kit contains two floats, a 2" NPT pipe plug, cuttable connecting tubes, and compression unions.
- Two SPST switches configurable for N.O. or N.C. operation
- Temperature ranges from -40°F to 392°F (depending on model)
- Pressure ratings up to 200 psig (depending on model)
Starting at
$269.00
(FLS-VK-200)
Float Level Tilt Switches
Float level tilt switches provide reliable level detection in open vessels, sumps, and ponds. These switches include a 7-meter cable, a weight, and an EPDM rubber float with a micro-switch that changes state as the float rises or falls +/- 45° from its nominal position.
- Mercury-free SPDT 16A switch output
- Long service life
- Resistant to solvents such as water, acids, alkalis, phosphate esters, ketones, and alcohols
- 32°F to 158°F operating temperature range
- 14.5 psig max operating pressure
Starting at
$44.00
(FLS-HT-100)
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