Best Flow Switches of 2025

The McDonnell & Miller FS4-3 Flow Switch is a versatile device designed for starting or stopping various electrically operated equipment. With a 1" NPT connection, this flow switch is suitable for a wide range of applications. It has a temperature range of 32 degrees F to 300 degrees F, allowing it to operate in different environments. The sensitivity adjusting screw makes flow adjustment easy, ensuring precise control. The flow switch comes with four stainless steel paddles in different sizes, allowing users to choose the most suitable one for their specific needs. Whether you need to control signal lights, alarms, motors, or metering devices, the McDonnell & Miller FS4-3 Flow Switch provides convenience and reliability.

The General Pump Flow Switch is a reliable and efficient device designed to control the flow of liquids. With a maximum switch voltage of 250 VAC and a maximum switching current of 5 AMPS, this flow switch can handle high-pressure systems with ease. It has a low resistance of 30 OHM with leads, ensuring accurate and responsive performance. The electrical service life of 200,000 cycles and mechanical service life of 10,000,000 cycles guarantee long-lasting durability. Whether you need to control the flow of water, chemicals, or other liquids, the General Pump Flow Switch is a dependable choice. Its high-quality construction and impressive performance make it an ideal solution for various applications.

The Grid Controls Flow Switch is a reliable device designed to manage fluid flow in your plumbing system. With a robust amperage rating of 10A, it ensures safe and efficient operation. The 2-inch spigot connection makes installation straightforward, allowing you to integrate it easily into your existing setup. This flow switch is especially useful for maintaining optimal flow rates, preventing potential damage to your system. By using this product, you can enhance the performance and longevity of your plumbing, providing peace of mind for your daily operations.

The McDonnell & Miller Flow Switch is an essential electronic component designed for reliable performance. With compact dimensions of 9.1 cm in length, 10.4 cm in width, and 21.3 cm in height, it can easily fit into various setups without taking up much space. Weighing just 1 pound, its lightweight design allows for easier installation and handling. Proudly made in the United States, this flow switch ensures quality and durability. Whether you need it for industrial applications or home use, it offers the convenience of consistent flow monitoring, helping you maintain efficient operation.

The Dwyer Vane Flow Switch is a versatile and cost-effective solution for monitoring flow in various applications. With its field adjustable set point and paddle design, this flow switch allows you to easily customize and control the flow rate. The wetted materials, including tin-bronze bellow and stainless steel vane, ensure durability and reliability even in harsh conditions. The forged brass body provides excellent resistance to corrosion. With a temperature limit of 230°F and pressure limit of 145 psig, this flow switch can handle demanding environments. Equipped with a SPDT snap switch and NEMA 4 enclosure rating, the Dwyer Vane Flow Switch offers precise and reliable flow monitoring.

The Niiyen Water Flow Switch, also known as the Niiyen Flow Switch, is an automatic element designed to control the flow in pipes. It is widely applicable in various industries such as water treatment systems, central air-conditioning, and water-cooled chillers. This flow switch is suitable for use with fluids like water, ethylene glycol, oil, or other non-hazardous and non-corrosive liquids, as well as air. One of its key features is the adjustable flow control value, which allows users to set the desired flow rate. The Niiyen Flow Switch also offers a stable repeat action point, ensuring reliable performance. With a protection grade of IP54, it provides durability and longevity, with the contactor life reaching up to 100,000 times. Additionally, the Niiyen Flow Switch features a circuit that connects or disconnects based on the flow rate. This feature ensures efficient operation and helps prevent any potential damage or issues.

The YWBL-WH HFS-25 Flow Switch is a high-quality stainless steel switch designed to measure the fluid dynamics of liquids passing through pipes. It is suitable for various applications such as water treatment systems, central air conditioning, water cooling units, and fire protection systems. With its corrosion-resistant properties, this flow switch ensures a long service life. The SPDT contacts of the switch allow for interlocking or "cut" protection when the flow exceeds the set value. This feature provides convenience and safety by connecting or disconnecting circuits as needed. The YWBL-WH HFS-25 Flow Switch is a reliable and efficient solution for fluid control in different fields.

The Chazcool Flow Switch is a reliable device for monitoring fluid flow in pipes. It operates within a range of 0 to 60°C, making it suitable for various liquids like water and ethylene dilution. The adjustable flow control feature allows you to customize the switch for different pipe sizes and flow rates, ensuring precise measurement. Additionally, the switch activates when the flow exceeds a set threshold, allowing you to manage your systems effectively. This flexibility and responsiveness help improve your operational efficiency and prevent potential issues.

The Hayward Flow Switch is designed specifically for the Saltron Reliant application, ensuring optimal performance for your swimming pool system. With a plumbing connection size of 3/4", it easily integrates into various setups, providing a reliable connection. The male pipe thread connection type further enhances compatibility, making installation straightforward for users. This flow switch helps maintain proper water flow, ensuring your pool equipment operates efficiently and effectively, giving you peace of mind while you enjoy your pool experience.

The DIGITEN Flow Switch is a reliable device designed to enhance safety in your water systems. Made from durable brass, it ensures that your equipment, like heaters and pumps, automatically shuts off when there is no water flow, preventing potential damage. Its 3/4" BSP male thread design allows for easy connections, offering versatility in installation. Additionally, the flow switch is built to withstand harsh conditions, being waterproof and heat-resistant, making it suitable for various applications. With a voltage range of 0-220V and a flow capacity of 1-30L/min, it meets the needs of many users.