Flow Switches

About our Flow Switches

Flow switches are critical safety and monitoring devices used across numerous industries to regulate and control the flow of liquids or gases through pipes, channels, and systems. These versatile switches play a vital role in ensuring proper flow rates, preventing system damage, and triggering alarms or actions in case of flow disruptions.

What are Flow Switches?

Flow switches are electromechanical devices that detect and respond to changes in the flow rate of a fluid (liquid or gas) passing through a designated channel or pipe. They act as sentinels, continuously monitoring the flow and activating when the flow rate exceeds or falls below predetermined thresholds.

How Do Flow Switches Work?

At the core of a flow switch is a sensing mechanism, often a paddle or vane, that is displaced by the flowing fluid. This displacement triggers an electrical signal, which is then sent to a control system, such as a Programmable Logic Controller (PLC) or other electronic controller. Depending on the application and the flow rate detected, the control system can initiate various actions, such as sounding an alarm, shutting down a pump, or activating a backup system.

Applications of Flow Switches:

Flow switches are indispensable in a wide range of applications where monitoring and controlling fluid flow is crucial. Some common applications include:

  • Pump Protection: Flow switches are used to protect pumps from damage caused by dry running or excessive flow rates, which can lead to cavitation and premature wear.
  • HVAC Systems: In heating, ventilation, and air conditioning (HVAC) systems, flow switches ensure proper airflow and detect blockages or leaks in the ductwork.
  • Water Treatment: Flow switches are employed in water treatment facilities to monitor and control the flow of water through various stages of the treatment process, ensuring efficient and consistent operations.
  • Chemical Processing: In the chemical industry, flow switches are used to regulate the flow of hazardous or corrosive fluids, preventing accidents and maintaining safe operating conditions.
  • Fire Suppression Systems: Flow switches are crucial components in fire suppression systems, detecting water flow and activating alarms or suppression mechanisms in the event of a fire.
  • Swimming Pool and Spa Systems: Flow switches are used to monitor and control the flow of water in swimming pool and spa systems, ensuring proper circulation and chlorination.

At Applications Engineering, we offer a comprehensive range of high-quality flow switches, including plastic-bodied and metal-bodied models, designed to meet the diverse requirements of various industries and applications. Our flow switches are engineered for reliability, accuracy, and durability, providing peace of mind and ensuring the safe and efficient operation of your critical systems.


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