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Showing Results For: Float Switches

Float Switches

Float switches are a type of level sensor that integrates a float with inbuilt sensor probes to detect and adjust the liquid levels in various systems and devices. These switches primarily control the operation of pumps, valves, or other electrical devices based on fluid levels. The basic design of a float switch consists of a buoyant float attached to a lever arm or stem. The float is usually made of a low-density material, such as foam or plastic, making the device easily float on the liquid's surface. The lever arm or stem is connected to a switch mechanism or sensor assembly. Due to the versatility, simple design, reliability, and reduced costs of float switches, they are widely used by professionals and DIYers in multiple settings.

Understanding the Working Principle of Float Switches

Float switches operate based on the principle of buoyancy. The liquid's buoyant force causes the integrated float of the switch to rise or fall, depending on the liquid levels. This transition in a liquid level triggers to activate the switch, send alarms to a control system, and turn ON or OFF the float switch by making or breaking the circuit. The float switch type depends on the requirements and applications and might include a magnetic reed switch, solid-state switch, or mechanical switch.

Special Features and Benefits of Float Switches

Float switches offer numerous benefits with their unique features, such as:

  • They are reliable, cost-effective, and used in different liquids.
  • Simple design with low maintenance needs.
  • Different configurations and easy integration.
  • Wide operating temperature range with high energy efficiency.
  • Resist corrosion and shock and rupture-proof. 
  • Automatic pump control, preventing overflow and drying.
  • Highly flexible and made of durable materials.

Most Popular Types of Float Switches

There are various float switch types available on the market based on their configurations and designs. The most common ones include:

  • Vertical Float Switches: These switches are designed to operate vertically, and the float moves up and down along a vertical stem.
  • Horizontal Float Switches: They operate in a horizontal position, and the float moves back and forth along a horizontal stem.
  • Miniature Float Switches: These small float switches are suitable for tight spaces or small tanks, such as coffee machines and humidifiers.
  • Wide-Angle Float Switch: This type of float switch has a wide-angle pivot, controlling the pump or device over a broader range of liquid levels. 
  • Tilt Float Switches: These switches feature tilt configuration and tilt when the liquid level rises or falls, activating the switch.
  • Cable Float Switches: These switches use a wire or cable (typically suspended in the liquid) to connect the float to the switch.
  • Tethered Float Switches: These switches have a float attached to the end of a flexible tether or cable. The float moves up and down with the liquid level, and the tether pulls or releases a lever to activate the switch.
  • Magnetic Float Switches: These switches use a magnet inside the float and a reed switch or Hall effect sensor outside the float chamber. As the float moves with the liquid level, the magnet activates the sensor to open or close the switch.
  • Electronic Float Switches: Unlike traditional mechanical float switches, electronic float switches use solid-state sensors or conductive probes to detect liquid levels and trigger the switch electronically. They are often more reliable and have no moving parts.
  • Multi-Level Float Switches: These switches comprise multiple floats at different levels on a common shaft or cable. Each float corresponds to a specific liquid level, allowing for control at various points.

Typical Applications of Float Switches

Due to their versatility and effective performance, Float switches are mostly employed in a range of industrial, commercial, and residential environments. They are found in multiple equipment and facilities, including: 

  • Water Tanks: To detect the water level and control the water pump.
  • Sump Pumps/Pits: Float switches are used in sump pits to detect the water level and turn it on or off.
  • Sewage Systems: Float switches are used in sewage systems to control the water level in the sewage tank.
  • Industrial Applications: Float switches are used in various industrial applications, including chemicals and food and beverages, to control liquid levels in tanks, washers, containers, and machines.
  • Refrigerators and air conditioning units: Controlling and adjusting water levels.
  • Coolant and Fuel Tanks: To detect and adjust liquids at optimum levels.

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New Items
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FLPVA50A250, Cynergy3

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The Cynergy3 FLPV series is a flameproof vertical float switch range which has been designed to give the user a long reach float switch with a number of switching options, to cater for a wide variety of system requirements. Manufactured in Stainless Steel 316L material, these switches are suitable for use in many aggressive liquids or hygienic applications. The switches are screw mounted vertically via a 1 ” BSP thread, and does not require access to the inside of the tank. Dual switch point for high/low indication Stainless Steel 316L material PED Approved (10 Bar) G1 ” mounting thread (optional flange mount)
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FLPVA50A100, Cynergy3

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The Cynergy3 FLPV series is a flameproof vertical float switch range which has been designed to give the user a long reach float switch with a number of switching options, to cater for a wide variety of system requirements. Manufactured in Stainless Steel 316L material, these switches are suitable for use in many aggressive liquids or hygienic applications. The switches are screw mounted vertically via a 1 ” BSP thread, and does not require access to the inside of the tank. Dual switch point for high/low indication Stainless Steel 316L material PED Approved (10 Bar) G1 ” mounting thread (optional flange mount)
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RSF77YNP/RS, Sensata/Cynergy 3

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Cynergy3 Horizontal Float Switch - Compression Seal Cynergy3 horizontal float switches are compact in size and available in a range of materials and gasket choices to suit a broad range of applications. Horizontal level switches offer long-term reliability from a simple and trusted design that requires no complex setup or calibration procedures. Switch function can be easily changed from normally open to normally closed by simply rotating through 180° during installation. Features and Benefits • Compression seal fitting • Flying lead or M12 plug connection • 25VA or 100VA versions Applications Cynergy3 vertical float switches are suitable for a wide range of applications including • Vending machines • Commercial dishwashers • Auxiliary tanks on vehicles
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Cynergy3 Vertical Float Switch - M12 Connection A range of Cynergy3 single switching point, vertical fluid level switches. These level switches can be mounted on the top or bottom of the tank but requires access to the tanks interior. Vertical level switches offer long-term reliability and minimal maintenance due to the simplistic construction. The switch can be changed from normally open to normally closed simply by removing and inverting the float. Features and Benefits • Compact Design • Available in Nylon, Polypropylene, PPS and PVDF • 25VA and 100VA • M12 Connector • Viton or Nitrile Gasket Applications Cynergy3 vertical float switches are suitable for a wide range of applications including • Vending machines • Printing systems • Chemical dosing equipment
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The LLF40 series is designed as a compact internal fitting device, with a wide range of options, making this ideal for size sensitive applications. Mounting of this series requires access to the inside of the tank. These devices are particularly suitable for detecting low levels of liquids in the bottom of tanks and containers, and for lower SG liquids. Typical applications include vending machines, commercial washing machines and evaporator units. They are manufactured in a variety of materials with a choice of gasket materials, to suit most commonly used liquids. The switch action may be reversed by rotating the device through 180º. Available with flying leads or M12 socket for electrical connection. Cable sets with M12 plugs are also available. Suitable for low specific gravity liquids (0.7 S.G.) Very low level sensing Class leading compact design Flying Lead or M12 plug connection Available in Nylon, Polypropylene, PPS or PVDF 25VA & 100VA versions
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LLF46HFP, Sensata/Cynergy 3

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LLF77HNP, Sensata/Cynergy 3

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RSF84H100R, Sensata/Cynergy 3

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LLF59Y100JC, Sensata/Cynergy 3

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LLF Series Vertical Fast Lift Float Switches The LLF series has been designed for applications where extremely low levels are needed to be detected. The LLF uses a Buna float which has a large diameter and allows the sensor to pick up very low levels of liquid (as little as 6mm). Ideal for use in hatch alarms and drip tanks. Extremely Low Level Detection System For Use Where Sensitive Fluid Detection is Required Vertically Mounted 10 mm Switch Actuation Level Low SG Operation of 0.45
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FAQs
We offer free shipping for orders over £200 if delivery is in the UK. All other orders in the UK, shipping from £7.99 depending on the weight and measurement. Mainland Europe shipping charges start from £25. For all other countries shipping charges start from £50 for products like Float Switches and all others.
You can email us directly at sales@enrgtech.co.uk or via our website for any queries regarding Float Switches or any other product.
This depends on the Float Switches individual product and information that can be found on our website.
Yes, we offer special discounts on orders above £200 for Float Switches and all other products.
UK orders normally take between 2/3 working days. International orders normally take between 3/5 working days for all products including Float Switches.
Yes. We keep updating our stock frequently and if a product like Float Switches is not in stock then we will let you know.