Level Switches/

Level Control Switch

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

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SOR Inc.
Lenexa, KS
800-676-6794, 913-956-3078
SOR® manufactures a full line of pressure, differential pressure, temperature, vacuum and level switches that are certified fit for use in SIL (Safety Integrity Level) environments. We are one of only a few manufacturers to offer its entire range of switches certified to the IEC 61508 standard. Our fundamentals include superior quality, excellent service and quick delivery.
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Dwyer Instruments, Inc.
Michigan City, IN
800-872-9141
Since the company was founded in 1931, customers have come to recognize Dwyer Instruments Inc. to stand for quality, reliability and low cost products, including level control switches. As a leading manufacturer in the controls and instrumentation industry, we continue to grow and serve major markets including, but not limited to HVAC, chemical, food, oil and gas and pollution control.
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AMETEK Drexelbrook
Horsham, PA
800-553-9092
At AMATEK Drexelbrook, our prestigious position in measurement technology stems from a unique combination of application expertise, innovative product design and a breadth of technology offerings that we continue to expand. Drexelbrook pioneered, and continues to advance, RF admittance level instrumentation. Today, we also offer products like level control switches.
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Gems Sensors & Controls
Plainville, CT
800-378-1600
Gems Sensors & Controls is a leading manufacturer of switch products like level control switches, pressure switches, pressure transducers, flow switches, miniature solenoid valves, proximity switches and liquid level control units for use in a broad range of fluids across industry. Gems products feature an ever-expanding selection of fluidic and pressure sensing technologies.
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Industry Information

Level Control Switch

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.