Float Level Switches

A reliable source for Level Switch information and leading Level Switch Companies & Manufacturers.

Float level switches are useful in many contexts. In wastewater treatment plants, the amount of water in a purification system is usually measured by some kind of float level sensor or switch. Level control switches are also used in the agriculture industry, pharmaceutical products development, a variety of manufacturing processes and in an extensive variety of other applications. Read More…

Float Level Switches Float level switches are utilities that monitor and control the level of liquids in storage and transmission systems. There are many cases in which the accurate measurement of liquid levels in a storage enclosure or transmission apparatus is essential. In fuel storage tanks, for example, fuel levels often cannot be determined by any other means than with a float level switch.

Leading Manufacturers

Monterey, CA  |  800-866-0200

Sierra`s Innova-Switch&trade electronic instruments and devices represent the state-of-the-art in gaseous and liquid flow switching or liquid level control. All of our products, like the standard level switches, meet a broad range of performance and environmental application requirements. Our switches are easy to install and work reliably long term, which means you can depend on them.

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Sierra Instruments $$$

McDonough, GA  |  800-780-3776

We provide a full line of glass solutions including redline heavy wall glass, high pressure gage glass, clear heavy wall gage glass, and more. Our teams go out of our way to find the best products for your needs. Please give one of our representatives a call today to learn more information!

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BoilerSupplies.com $$$

Eagan, MN  |  800-852-9984

FPI Sensors manufactures standard and custom liquid level sensors. Our capabilities include single and multi-level float sensors, side mount, leak detection, continuous measurement, field adjustable products and custom applications. We have technology in capacitance, optical sensing and float type switches. We have the ability to modify standard products and to build complete custom designs.

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FPI Sensors International $$$

Oxnard, CA  |  800-562-2447

Since 1956, Harwil Corporation has been providing quality design and manufacturing of electro mechanical fluid flow and liquid level switches as well as pump emergency shutdown controllers. All of Harwil’s level switches are designed with a focus on producing simple, reliable, low cost units with broad operating flexibility in a multitude of physical, thermal and chemical operating environments.

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Harwil Corporation $$$

Detroit Lakes, MN  |  218-847-1317

The pioneering efforts 30 years ago made the first Tank Alert® alarm and Sensor Float® control switch. Today, SJE-Rhombus has become a leading manufacturer of reliable, trouble-free liquid level controls for the water, wastewater and sewage industries. Our complete product line includes Build-A-Panel™ control panels, engineered custom systems, Tank Alert® alarm systems, pump and control switches.

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SJE Rhombus $$$
placeholder image Sierra Instruments BoilerSupplies.com FPI Sensors International Harwil Corporation SJE Rhombus

Many sump pump varieties also require float level switches in order to function correctly. Float level switches offer many attractive qualities to their users. They are generally simple in design, which makes them easy to operate and can make them inexpensive. Electrical interference does not affect float level switches. Depending on their intended use, float level switches can be constructed from materials that allow them to function in high-temperature and high-pressure environments.

Different level switches function in different ways. A level management tool can be used for the measurement of material levels in a system, or it can be used for both measurement and control. The simplest float level switch would consist of a hollow, buoyant bulb that would, upon contact with rising liquid levels, become raised, which would trigger a mechanism within the equipment to which the bulb is attached.

Such systems transmit level data based on whether or not their internal circuitry is open or closed. When a level switch bulb is descended, for example, the internal circuitry to which it is attached is usually open. When it rises enough, the circuit becomes closed, sending a signal to monitoring equipment.

In some cases, that monitoring equipment doubles as control equipment, allowing for the automatic adjustment of level control apparatus. Such devices are very helpful in preventing overfilling of storage tanks and other similar equipment; when material levels reach a certain level in an enclosure, the float level switch registers the level and sends signals to equipment that can prevent the level from rising any higher.