Floating Level Switch

$ 225.00$ 485.00


Floating Level Switch





A Floating Level Switch is a simple yet effective device used to monitor liquid levels in tanks, reservoirs, and other containers.  Also, it is commonly used in industrial, commercial, and residential applications to provide reliable and accurate level sensing.


The basic principle behind the Floating Level Switch is that it utilizes a buoyant object, typically a hollow cylindrical shape, which floats on the surface of the liquid being measured.  Also, the buoyant object is usually made of a material with a specific gravity less than that of the liquid so that it floats effortlessly on its surface.

Inside the buoyant object, there is a magnet that moves freely along with the rising or falling liquid level.  Moreover, the magnetic attraction forces the magnet to move up or down with the buoyant object, providing a reliable indication of the liquid level.  Additionally, this magnet is attached to a switch that is located outside the tank or container.


When the liquid level rises and the buoyant object reaches a predetermined height, the magnet in the switch aligns with an embedded reed switch, causing it to close.  Also, this closure of the switch triggers an electrical signal, indicating that the liquid level has reached the desired level.  Conversely, when the liquid level falls and the buoyant object descends, the magnet moves away from the embedded reed switch, causing it to open and breaking the electrical circuit.

The Floating Level Switch is designed to be versatile and adaptable to various liquid applications, ranging from clean water to wastewater, oils, chemicals, and other corrosive liquids.  Additionally, this switch is available in different materials such as stainless steel, brass, or plastic, depending on the compatibility requirements of the liquid being monitored.

Additional Features

In addition to the basic design, many Floating Level Switches come with additional features to enhance their functionality and convenience.  One such feature is the adjustable switch point, allowing the user to set the desired liquid level at which the switch should be activated.  Besides, this adjustable switch point ensures flexibility in different applications where specific liquid level ranges need to be monitored.

Another feature is the ability to choose between normally open (NO) or normally closed (NC) configurations.  As well as that, in the NO configuration, the switch is open when the liquid level is below the desired level and closes when it reaches that level.  Furthermore, in the NC configuration, the switch is closed in the absence of liquid and opens when the liquid reaches the desired level.

Floating Level Switches are compact, easy to install, and require minimal maintenance. Also, they can be mounted on the top or side of the tank or container using threaded, flanged, or other suitable connections.  Also, the switch housing is designed to be weatherproof or even explosion-proof for hazardous environments, ensuring safe operation under harsh conditions.


Usage of Floating Level Switches can be found in a wide range of applications such as water treatment plants, industrial storage tanks, sump pumps, agricultural irrigation systems, cooling towers, oil refineries, chemical processing plants, and many other industries requiring precise liquid level control.

In summary, the Floating Level Switch is a reliable and cost-effective solution for liquid level monitoring.  Additionally, Its simple yet effective design, combined with additional features and a wide range of applications, makes it a popular choice for industries and individuals who require accurate measurement and control of liquid levels.


The Floating Level Switch offers several advantages over other types of level sensing devices.  One of the key advantages is its ability to detect both high and low liquid levels.  Positioning the switch at the desired level ensures that the liquid does not exceed or fall below the predetermined threshold.  Also, this versatility makes it suitable for various applications where maintaining liquid levels within specific ranges is crucial.

Furthermore, the Floating Level Switch is highly reliable and provides precise measurements.  As well as that, it’s magnetic operation eliminates the contact between the sensing components, reducing the chances of wear and tear.  Moreover, this results in a longer lifespan and reduced maintenance requirements, ultimately leading to cost savings for the user.


The simplicity of the Floating Level Switch also contributes to its ease of installation and operation.  With minimal wiring and setup, it can be quickly integrated into existing systems or incorporated into new installations.  The user-friendly design allows for hassle-free adjustments of the switch point to meet specific level requirements.

Moreover, the availability of different materials for the switch construction ensures compatibility with a wide range of liquids.  As well as that, this versatility ensures that the Floating Level Switch can be used in diverse environments without compromising its functionality or longevity.

In addition to its straightforward operation, the Floating Level Switch can be combined with other control systems to enhance automation and efficiency.  Also, by integrating it with alarms, pumps, or control panels, it can trigger actions such as turning on/off equipment or sounding alerts when the liquid level reaches critical points. This integration streamlines processes and improves overall system performance.

Limitations of a Floating Level Switch

However, it is important to note that the Floating Level Switch does have a few limitations. One limitation is its reliance on the buoyancy of the float.  If the liquid being measured has high viscosity or contains particles that can interfere with the float’s movement, accurate readings might be compromised.  In such cases, alternative-level sensing technologies such as ultrasonic or capacitive sensors may be more suitable.

Another consideration is the size and weight of the float.  Depending on the application, the size of the tank or container, and the desired level range, the float’s dimensions and buoyancy must be carefully chosen to ensure optimal performance.

Overall, the Floating Level Switch is a reliable and efficient solution for liquid-level sensing.  Its simplicity, versatility, and cost-effectiveness make it a popular choice in various industries.  Additionally, with its ability to monitor both high and low levels, it ensures the safe and efficient operation of systems that rely on precise liquid level control.

Advantages of a Floating Level Switch


Floating level switches have a straightforward design, making them easy to install and operate.  They typically require minimal wiring and can be quickly integrated into existing systems or incorporated into new installations.


Floating-level switches are versatile and can be used in a wide range of applications.  In addition, they are compatible with various liquids, including clean water, chemicals, oils, and wastewater, making them suitable for different industries and environments.


Floating level switches provide reliable and accurate measurements of liquid levels.  Moreover, the use of magnets and reed switches ensures precise detection, allowing for precise control and monitoring of liquid levels in tanks or containers.


Floating level switches are cost-effective compared to other level sensing technologies.  They are relatively inexpensive to purchase and require minimal maintenance, leading to cost savings over time.

Adjustable switch point

Many floating-level switches come with an adjustable switch point, allowing users to set the desired liquid level at which the switch should be activated.  Also, this flexibility enables customization to specific applications and level requirements.

Disadvantages of a Floating Level Switch

Limited to liquid media

Floating level switches are designed for liquid level monitoring and may not be suitable for other mediums such as solids or gases.  Also, if the substance being measured is not liquid or if it has properties that hinder the float’s movement, alternative-level sensing technologies may be required.

Sensitivity to turbulence

If the liquid being measured experiences turbulence or agitation, it may interfere with the floating level switch’s operation.  Furthermore, turbulence can cause the float to move erratically, leading to inaccurate readings.  Additionally, in such cases, additional measures may be needed to stabilize the liquid to ensure reliable level detection.

Size limitations

The size and weight of the float may impose limitations on the application.  Moreover, if the tank or container is too small or if the desired level range is outside the float’s capabilities, alternative level sensing methods may need to be considered.

Maintenance in corrosive environments

While floating-level switches are generally durable, exposure to corrosive liquids or harsh environments may lead to degradation over time.  Also, in such cases, selecting a float made from corrosion-resistant materials or implementing protective measures may be necessary.

Single-point detection

Floating-level switches typically provide single-point detection, indicating when the liquid level reaches a specified threshold.  In addition, if more granular or continuous level monitoring is needed, alternative level sensing technologies like ultrasonic or pressure sensors may be more suitable.

In conclusion, floating-level switches offer simplicity, versatility, accuracy, cost-effectiveness, and adjustable switch points for liquid-level monitoring.  However, they may have limitations in terms of the medium being measured, sensitivity to turbulence, size constraints, maintenance in corrosive environments, and single-point detection capability. Consideration of these advantages and disadvantages will help determine whether a floating-level switch is the most suitable choice for a specific application.

There are several types of floating-level switches available, each offering unique features and functionalities to suit different applications.  Here are some common types:

Vertical Float Switches

Vertical float switches are simple and commonly used for liquid-level measurement.  In addition to this, they consist of a buoyant float that moves up and down along a vertical stem or guide tube.  As the liquid level changes, the float rises or falls, actuating a switch at a specific predetermined level.  Vertical float switches can be either normally open (NO) or normally closed (NC) based on the desired configuration.

Horizontal Float Switches

Horizontal float switches are similar to vertical float switches but have a different orientation.  Also, instead of moving vertically, they move horizontally along a guide tube.  Additionally, this type of float switch is suitable for applications where vertical space is limited or for detecting the presence or absence of liquids at a certain level.

Magnetic Float Switches

Magnetic float switches use a magnet embedded in the float to actuate a reed switch external to the tank or container.  As the liquid level rises or falls, the magnet moves accordingly, triggering the switch.  Besides, magnetic float switches offer reliable performance and are often used in applications where maintenance-free operation is essential.

Cable Float Switches

Cable float switches consist of a buoyant float attached to a flexible cable or wire.  As the liquid level changes, the float moves up or down, causing the cable to unwind or wind onto a drum.  In addition, this mechanical movement is converted into an electrical signal through a pulley and connected to a control system.  Finally, the cable float switches are commonly used in large tanks or reservoirs and can provide continuous level monitoring.

Displacer Float Switches

Displacer float switches use the Archimedes principle to detect liquid levels.  A displacer, which is a heavy object, is suspended by a spring or cable and immersed in the liquid.  Also, as the liquid level changes, the force acting on the displacer changes, causing it to move.  Along with this change in position is then used to trigger a switch, indicating the liquid level.  Finally, displacer float switches are commonly used in hazardous or aggressive environments.

Multi-level Floating Level Switches

Multi-level float switches are designed to detect multiple liquid levels within a tank or container.  Additionally, they consist of multiple floats with different buoyancy levels, each corresponding to specific liquid levels.  Also, as the liquid level rises or falls, the floats move accordingly, activating switches at different set points.  Multi-level float switches are often used in complex systems where precise control of multiple levels is required.

These are just a few examples of the types of floating-level switches available.  In addition, each type offers different benefits and is suitable for specific applications, so it’s important to select the appropriate type based on the requirements and operating conditions of the system.

Floating-level switches find application in various industries and sectors due to their versatility.  Some of the industries served by floating level switches include:

Water and wastewater treatment

Floating-level switches are widely used in water and wastewater treatment plants.  This is to monitor and control liquid levels in tanks, basins, and reservoirs.  As well as that, they ensure proper water level management, preventing overflow or low levels that could disrupt treatment processes.

Chemical processing

Floating-level switches are utilized in chemical processing plants to monitor liquid levels in storage tanks, mixing vessels, and reactors.  Besides, they play a crucial role in maintaining optimal volumes for efficient and safe chemical production.

Oil and gas

Floating-level switches are essential in the oil and gas industry for monitoring liquid levels in storage tanks, separators, and pipelines.  Also, they help prevent overfilling or underfilling, ensuring operational efficiency and safety.

Food and beverages

Floating level switches are used to monitor liquid levels in tanks and vessels.  This is used during the production of beverages, dairy products, and processed foods. Additionally, they contribute to maintaining consistent production and preventing overflow or product contamination.


Floating-level switches find application in pharmaceutical manufacturing facilities to monitor liquid levels.  Monitoring that is needed in reaction vessels, storage tanks, and other critical equipment.  Moreover, they help maintain process integrity and ensure product quality.

HVAC and refrigeration

Floating-level switches are employed in heating, ventilation, and air conditioning (HVAC) systems and refrigeration units.  This is to control liquid levels in condensate pans, drainage systems, and coolant reservoirs.  They prevent overflow and ensure the proper functioning of the equipment.

Power generation

Floating-level switches are used in power plants to monitor liquid levels in fuel storage tanks, cooling towers, and wastewater treatment systems.  They help prevent equipment damage and optimize energy generation processes.

Agriculture and irrigation

Floating-level switches play a role in agricultural applications, including irrigation systems and water storage tanks.  Also, they help monitor water levels, ensuring efficient water usage and preventing over-watering or water shortages.

Marine and maritime

Floating level switches find application in marine and maritime industries for monitoring fuel levels in tanks, bilge water levels, and ballast tanks of ships and vessels.  They contribute to safe and efficient operation at sea.

These are just a few examples of the industries where floating-level switches are widely used.  Their versatility, reliability, and cost-effectiveness make them essential components in a range of applications that require accurate liquid level control and monitoring.

The durable construction of these magnetic reed switches ensures long, trouble-free service.  In addition, when the effects of shock, wear, and vibration are minimized, these hermetically reed-sealed switches provide precise repeatability with no more than 1% deviation.  The sensor actuation points remain constant over the life of the float switch.

Customers typically choose float switches and magnetic reed switches because they are hyper-reliable, simple, and are an economical way of determining the liquid level.

These sensors can be made of a variety of material options and are compatible with most liquid media. These sensors are intended to actuate when media is at a single set high or low point.

If this sensor does not meet your application requirements, pls view SRS’s other types of sensors

Tuning Fork Level Switch

Capacitance level switch

Additional information

Weight 5 lbs
Dimensions 16 × 12 × 12 in

24VDC, 120VAC/220VAC


Non-Hazardous, Explosion Proof, Intrinsically Safe

Connection End

Flanged, NPT, Triclamp



Floating Level Switch Floating Level Switch Floating Level Switch Floating Level Switch


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

You may also like