McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch
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McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch
Used for starting or stopping electrically operated equipment. Sealed Monel Bellow. Four stainless steel paddles included: 1, 2, 3 & 6.
McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch
зүйлийн дугаар: 402234

McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch

зүйлийн дугаар: 402234

MNT 863613

Price Details

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

*All items will import from АНУ

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Яг одоо захиалаад ойрын хугацаанд хүлээн аваарай Мягмар гараг, 8 дугаар сар 11
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Used for starting or stopping electrically operated equipment. Sealed Monel Bellow. Four stainless steel paddles included: 1, 2, 3 & 6.
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What Stands Out

Reliable Performance
Ensures consistent operation by accurately detecting liquid flow rates, preventing potential system failures and maintaining efficient process control across various applications.
Versatile Compatibility
Designed to work seamlessly with multiple liquids, making it suitable for diverse industrial applications while reducing the need for various switches.
Durable Construction
Built with high-quality materials that withstand tough environments, providing long-lasting durability and reducing maintenance costs over time.

Бүтээгдэхүүний дэлгэрэнгүй мэдээлэл

Get the McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch at Ubuy Mongolia. Perfect for electrically operated equipment. Shop now!
Package Weight2.16 Pound

Who Should Buy?

Suitable For
  • HVAC Systems

    Ideal for HVAC professionals needing reliable flow detection to optimize system performance and prevent equipment damage.

  • Industrial Applications

    Well-suited for various industrial processes where liquid flow monitoring is crucial for operational efficiency and safety.

  • Water Treatment

    Effective for water treatment facilities requiring precise flow measurement to ensure proper chemical dosing and system integrity.

Not Suitable For
  • High Viscosity Fluids

    Not suitable for fluids with high viscosity that could impede the functionality of the flow switch.

БАРААНЫ ТАЙЛБАР

McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch

Асуулга байна уу? Бидэнтэй чатлаарай

Хэрэглэгчийн асуулт ба хариултууд

  • Асуулт: What is the McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch used for?

    Хариулт: The McDonnell & Miller FS4-3 Liquid Flow Switch is designed for monitoring liquid flow in a variety of applications. It triggers alarms or controls equipment when the flow rate drops below a predetermined threshold, making it vital for systems that require precise liquid management. Industries such as HVAC, water treatment, and boiler systems frequently utilize this device to ensure proper functionality and prevent damage caused by inadequate flow.
  • Асуулт: What types of liquids can the McDonnell & Miller FS4-3 accommodate?

    Хариулт: The FS4-3 is suitable for use with water and various other non-corrosive liquids. Using it in applications with fluids that match its compatibility specifications is essential to ensure safe and effective operation. It is commonly used in cooling towers, boilers, and industrial processes where monitoring of liquid flow is critical.
  • Асуулт: How does the McDonnell & Miller FS4-3 work?

    Хариулт: The FS4-3 operates using a paddle that detects liquid flow within a pipeline. When the flow rate is adequate, the paddle remains in a designated position, keeping the electrical contacts closed. If the flow diminishes below a set level, the paddle moves, opening the contacts and triggering alarms or control actions. This simple yet effective mechanism provides real-time monitoring and enhances operational safety.
  • Асуулт: Can the FS4-3 be used in outdoor applications?

    Хариулт: Yes, the McDonnell & Miller FS4-3 can be installed outdoors if it is properly housed in a weatherproof enclosure. This ensures protection from environmental elements, prolonging its lifespan and maintaining its reliability. Common applications include outdoor cooling systems and irrigation setups, where monitoring flow is crucial for system efficiency.
  • Асуулт: What is the fitting size for the FS4-3 Liquid Flow Switch?

    Хариулт: The FS4-3 features a standard 3/4-inch NPT (National Pipe Thread) fitting size. This compatibility allows for easy integration into existing pipework systems without the need for specialized adapters. Its universal fitting makes it ideal for various industrial and commercial applications requiring straightforward installation.
  • Асуулт: Is the FS4-3 adjustable for different flow rates?

    Хариулт: Yes, the McDonnell & Miller FS4-3 allows for adjustable settings to cater to different flow rates. The adjustment process is straightforward, typically involving a screw mechanism that you can calibrate to meet specific operational needs. This enables users to customize the switch for particular systems, ensuring efficient operation based on varying flow requirements.
  • Асуулт: What safety features does the FS4-3 provide?

    Хариулт: The FS4-3 includes several safety features designed to prevent equipment damage and ensure reliable operation. These features include automatic shut-off control for essential systems and alarm outputs that alert operators when flow levels are insufficient. This makes it a valuable component in safeguarding sensitive equipment like pumps and boilers from potential failures.
  • Асуулт: How do I install the McDonnell & Miller FS4-3?

    Хариулт: Installation of the FS4-3 involves connecting it into the pipeline at the desired location. It is crucial to follow manufacturer instructions, ensuring that the flow switch is oriented correctly according to the flow direction. Tools required include basic plumbing tools for cutting and sealing. Proper installation minimizes leaks and maintains the efficiency of the liquid monitoring system.
  • Асуулт: Where can I buy the McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch?

    Хариулт: You can purchase the McDonnell & Miller FS4-3 General Purpose Liquid Flow Switch from Ubuy. Ubuy provides a convenient platform to explore, select, and acquire the FS4-3, ensuring a seamless shopping experience. With product information and details readily available, you can make informed decisions for your liquid flow monitoring needs.

Mcdonnell&Miller Flow Switches Editorial Review

The 3/4" Water Flow Switch is an essential component that has become popular among commercial water heaters and boilers. The switch is quite sensitive, so it should be installed at a distance of 1/2" to 1" from the bottom of the water flow. When installed correctly, it works great and saves time. The product is highly efficient, with a 120VAC switch rating of 7.4 Full Load Amps and 240VAC is 3.7 Full Load Amp. The pricing is competitive, and the switch has a long lifespan of 5-7 years, especially in areas with very hard water.

Customer Reviews & Ratings

5.0
1 Хэрэглэгчийн үнэлгээ
  • 5 од
    100%
  • 4 од
    0%
  • 3 од
    0%
  • 2 од
    0%
  • 1 од
    0%

Энэ бараанд шүүмж өгөх

Бусад хэрэглэгчидтэй санал бодлоо хуваалцана уу

Давуу тал

  • Highly efficient
  • Good value for money
  • Easy to install
  • Works great when installed correctly

Сул талууд

  • Sensitive, and can trip if not installed at the correct distance from the bottom of the water flow.

Platform Trust & Buyer Confidence

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4.3/5 9200 + reviews
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Mohammad
Verified buyer

“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”

23 July 2026 · via Trustpilot
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”

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“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”

23-Jul-26 · via Trustpilot
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“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”

22 July 2026 · via Trustpilot
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SAO JOHN
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“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”

23 July 2026 · via Trustpilot
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Product Price History

Чухал мэдээлэл

  • Хязгаарлалт : Олон улсын хүргэлтээр илгээгдсэн барааны тохиолдолд, үйлдвэрлэгчийн баталгаа хүчингүй байх, үйлдвэрлэгчийн үйлчилгээ хүргэх боломжгүй, барааны заавар, гарын авлага болон анхааруулга очих улсын хэлдээр биш байх магадлалтай гэдгийг анхаарна уу. Мөн бараа болон дагалдах хэрэгсэл нь тухайн улсын стандартыг мөрдөөгүй, чанарын заалт болон шошгын шаардлагыг хангаагүй байх магадлалтай бөгөөд, тухайн улсын цахилгааны вольтод тохирохгүй байж болзошгүй (тохирох адаптер болон хувиргагч шаардлагатай) юм. Хүлээн авагч нь барааг тухайн улс уруу хуулийн дагуу импортлогдохыг батлах ёстой. Ubuy болон түүний холбоот түншүүдээс худалдан авсан тохиолдолд худалдан авагч нь хүлээн авах улсын бүх хууль болон заалтуудыг мөрдөх ёстой.
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MNT 863613

Яг одоо захиалаад ойрын хугацаанд хүлээн аваарай Мягмар гараг, 8 дугаар сар 11

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PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

Our Top Logistics Partners
  • fedex
  • dhl
Fastest cross-border delivery

Онцлог & Давуу талууд

  • For starting or stopping electrically operated equipment
  • Sealed Monel Bellow
  • Sensitivity adjusting screw makes flow adjustment easy
  • Four stainless steel paddles included: 1, 2, 3 & 6.

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