Level Control Switch

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

Typically, the materials need to remain within the certain range for safety purposes, or because the process depends on having a very specific amount of the material. In addition, level control switches can be used for materials such as liquids, slurries, solids and sludge. Read More…

Level Control Switch Level control switches are used specifically for material flow control, ensuring that levels remain within a specific, designated range.

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

Level control switches can be essential components in many applications and are used in a wide range of industries, including industrial, for use in manufacturing and processing applications; marine, for use in control of shipboard vessel liquid levels; commercial, for use in applications such as in office buildings, restaurants and more; residential, for use in water level control applications for houses, condominiums and multi-storied apartment buildings; and appliance, for use in water level control in dishwashers, clothes washers and more.

Additionally, level control switches can be used in industries such as automotive, defense contracting, wastewater, agriculture, chemical processing and petroleum. Although there are many domestic applications in which level control switches are utilized, it is in the industrial applications that their high-precision and efficiency become crucial.

While there are many different ways in which level control switches can function, there are methods that are more commonly used for industrial purposes. Some of these measurement techniques include differential pressure level switches, diaphragm level switches, optical level switches and ultrasonic level sensors. For differential pressure level control, the level of the material is determined from the difference between the two pressures (the pressure at the bottom of the tank compared to the atmospheric pressure) being equal to the height of the material when it is multiplied by the specific gravity of the material.

Diaphragm level control operates in much the same way, determining the level by means of the pressure that is produced at the given depth of a material with a known specific gravity. Optical level switches and ultrasonic level switches, on the other hand, operate in a much different manner than differential pressure and diaphragm level switches.

Optical level switches function by using optical sensors in order to use the light transmittance, reflective or refractive properties of the material being measured to determine its level. Ultrasonic level switches operate by utilizing the energy of ultrasonic acoustic waves, which are sound waves that have frequencies above the normal audible range. They operate by bouncing ultrasonic signals off of materials. The time it takes for the signal to bounce back to the switch indicates the level of the material.