Level Switches

Level switches are essential devices for monitoring and controlling liquid and solid material levels in industrial processes. They provide point-level detection within tanks, silos, pipelines, and other containers, allowing systems to trigger alarms, start or stop pumps, or prevent overfill and dry-run conditions. RSP Supply offers a broad selection of level switches designed to deliver consistent and accurate performance across a wide range of applications.

For liquid level detection, float switches remain a reliable and widely used solution, operating through simple mechanical movement as liquid levels rise and fall. In more demanding environments, such as applications involving large tanks, high set points, vibration, extreme temperatures, or corrosive materials, non-mechanical electronic level switches are often preferred. These designs eliminate moving parts, improving long-term reliability while maintaining precise detection.

Level switches are also commonly used in hazardous or remote locations, where dependable monitoring is critical. Available technologies include float switches, tuning fork level switches, optical level switches, and rotating paddle switches for bulk solids such as powders or grains. Many models are constructed with stainless steel housings to withstand high pressure, temperature extremes, and corrosive process media. Compact, rugged, and versatile, level switches provide dependable monitoring for liquids and solids in demanding industrial environments.

Found 389 items
Normally In Stock
Dwyer Mercoid CFS2-CNBPN-20 Mechanical Float Switch
Free U.S Ground shipping
$69.83
$58.19
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APG KA-M2L Level Float Switch
Free U.S Ground shipping
$244.96
$204.13
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APG LFS-H-10 Miniature Liquid Level Sensor Float Switch
Free U.S Ground shipping
$224.65
$187.21
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APG KA-1H Level Float Switch
Free U.S Ground shipping
$181.50
$151.25
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APG FT-100A Level Float Switch
Free U.S Ground shipping
$78.73
$65.61
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APG FT-100B Level Float Switch
Free U.S Ground shipping
$78.79
$65.66
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APG FT-100C Level Float Switch
Free U.S Ground shipping
$97.66
$81.38
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APG KA-M1L Level Float Switch
Free U.S Ground shipping
$215.36
$179.47
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APG KA-M1H Level Float Switch
Free U.S Ground shipping
$161.83
$134.86
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APG KA-M2H Level Float Switch
Free U.S Ground shipping
$253.34
$211.12
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APG KA-1L Level Float Switch
Free U.S Ground shipping
$187.67
$156.39
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Dwyer Mercoid FSW2-CNPN-20 Mechanical Float Switch
Free U.S Ground shipping
$170.64
$142.20
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APG KA-2L Level Float Switch
Free U.S Ground shipping
$227.00
$189.17
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Dwyer Mercoid FSW2-DNPN-20 Mechanical Float Switch
Free U.S Ground shipping
$170.64
$142.20
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Dwyer Mercoid FSW2-DNPN-30 Mechanical Float Switch
Free U.S Ground shipping
$192.74
$160.62
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Dwyer Mercoid FSW2-DNPN-40 Mechanical Float Switch
Free U.S Ground shipping
$214.86
$179.05
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Dwyer Mercoid FSW2-DNPN-10 Mechanical Float Switch
Free U.S Ground shipping
$148.52
$123.77
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Dwyer Mercoid FSW2-CNPN-40 Mechanical Float Switch
Free U.S Ground shipping
$214.86
$179.05
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APG KA-4H5E Level Float Switch
Free U.S Ground shipping
$463.74
$386.45
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APG KA-2H Level Float Switch
Free U.S Ground shipping
$227.00
$189.17
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Dwyer Mercoid CFS2-ONBPN-20 Mechanical Float Switch
Free U.S Ground shipping
$69.83
$58.19
Normally In Stock
Dwyer Mercoid FSW2-ONPN-30 Mechanical Float Switch
Free U.S Ground shipping
$192.74
$160.62
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Dwyer Mercoid FSW2-ONPN-40 Mechanical Float Switch
Free U.S Ground shipping
$214.86
$179.05
Normally In Stock
Dwyer Mercoid CFS2-OGDSN-20 Mechanical Float Switch
Free U.S Ground shipping
$104.36
$86.97
Normally In Stock
APG KA-4L Level Float Switch
Free U.S Ground shipping
$367.81
$306.51
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APG LFE-12P-0A Miniature Liquid Level Sensor Float Switch
Free U.S Ground shipping
$47.84
$39.87
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APG LFE-11R-1A Miniature Liquid Level Sensor Float Switch
Free U.S Ground shipping
$25.90
$21.58
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Dwyer Mercoid CFS2-OGDSN-30 Mechanical Float Switch
Free U.S Ground shipping
$143.32
$119.43
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Dwyer Mercoid FSW2-ONPN-50 Mechanical Float Switch
Free U.S Ground shipping
$236.98
$197.48
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Dwyer Mercoid CFS2-ONBPN-50 Mechanical Float Switch
Free U.S Ground shipping
$133.01
$110.84
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APG KA-3HE Level Float Switch
Free U.S Ground shipping
$307.51
$256.26
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APG KA-4H Level Float Switch
Free U.S Ground shipping
$355.73
$296.44
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Dwyer Mercoid FSW2-CNPN-50 Mechanical Float Switch
Free U.S Ground shipping
$236.98
$197.48
Normally In Stock
Dwyer Mercoid FSW2-CNPN-30 Mechanical Float Switch
Free U.S Ground shipping
$192.74
$160.62
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Dwyer L6EPB-B-D-3-A Flotect® Liquid Level Switch
Free U.S Ground shipping
$567.52
$472.93
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APG LFS-VE-S1 Miniature Liquid Level Sensor Float Switch
Free U.S Ground shipping
$172.26
$143.55
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APG LFP-V-2A-1000 Miniature Liquid Level Sensor Float Switch
Free U.S Ground shipping
$54.64
$45.53
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APG LFS-V-5G Miniature Liquid Level Sensor Float Switch
Free U.S Ground shipping
$101.60
$84.67
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Omega LV612-P RECTANGULAR FLOAT SWITCH CE
Free U.S Ground shipping
$138.68
$115.57
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Dwyer Mercoid FSW2-DNPN-15 Mechanical Float Switch
Free U.S Ground shipping
$159.59
$132.99
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Dwyer Mercoid CFS2-CNBPN-30 Mechanical Float Switch
Free U.S Ground shipping
$90.89
$75.74
Normally In Stock
Dwyer Mercoid CFS2-CNBPN-40 Mechanical Float Switch
Free U.S Ground shipping
$111.95
$93.29
Normally In Stock
Dwyer Mercoid CFS2-OGDSN-40 Mechanical Float Switch
Free U.S Ground shipping
$182.28
$151.90
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Dwyer Mercoid CFS2-OGDSN-50 Mechanical Float Switch
Free U.S Ground shipping
$221.24
$184.37
Normally In Stock
Dwyer Mercoid CFS2-CGDSN-20 Mechanical Float Switch
Free U.S Ground shipping
$104.36
$86.97
Normally In Stock
Dwyer Mercoid CFS2-CGDSN-30 Mechanical Float Switch
Free U.S Ground shipping
$143.32
$119.43
Normally In Stock
APG KA-2H15 Level Float Switch
Free U.S Ground shipping
$382.12
$318.43

FAQs

Q: What is a level switch used for?
A level switch detects the presence of a liquid or solid material at a specific point within a tank, silo, or vessel. It is used to control equipment, trigger alarms, or protect processes from overfill or empty conditions.

Q: Are level switches suitable for both liquids and bulk solids?
Yes, different types of level switches are designed for liquids and bulk solids. Float, tuning fork, and optical switches are commonly used for liquids, while rotating paddle switches are typically used for powders, pellets, and grains.

Q: Do point-level switches provide a cost-effective solution for tank level monitoring?
Yes, point level switches offer a cost-effective and reliable solution for monitoring fluid levels on tank walls by providing accurate detection at specific set points.

Q: Can reed switches operate in conductive liquids?
Yes, reed switches can operate in conductive liquids because they are magnetically actuated and typically sealed, preventing direct electrical contact with the liquid.

Q: Which level switches use rotating paddles or infrared sensors?
Rotating paddle level switches use a motor-driven paddle to detect the presence of bulk solids, while optical level switches use an infrared LED and receiver to detect liquid levels based on changes in light reflection.

Why Buy Level Switches from RSP Supply

RSP Supply offers a comprehensive selection of level switches designed for reliable liquid and solid level detection in industrial environments. Our product offerings support a wide range of sensing technologies, materials, and installation requirements to meet diverse application needs. Customers rely on RSP Supply for dependable components, technical expertise, and solutions that support accurate process monitoring and control.