McDonnell & Miller FS7-4W Insertion-Style Flow Switch for Liquids
The MCDONNELL & MILLER FS7-4W is a paddle-type insertion-style flow switch for liquids, designed for pipe sizes from 1-1/4 in to 16 in. It features a brass body with a 1-1/4 in NPT connection and an SPDT switch rated…
SKU 3G-OTH-93930
Also listed as: FS74W · FS7 4W
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The MCDONNELL & MILLER FS7-4W is a paddle-type insertion-style flow switch for liquids, designed for pipe sizes from 1-1/4 in to 16 in. It features a brass body with a 1-1/4 in NPT connection and an SPDT switch rated at 7.4 A @ 120V (Full Load). This switch carries a hazardous location rating of Class I, Div 1 and 2, Group C, D.
Frequently Asked Questions
What is the McDonnell & Miller FS7-4W flow switch used for?
The McDonnell & Miller FS7-4W is a paddle-type insertion flow switch for liquids. It detects flow or no-flow conditions in pipes from 1-1/4 in to 16 in, commonly used in industrial process control, HVAC, and water treatment systems to protect pumps and equipment.
What are the specifications of the McDonnell & Miller FS7-4W?
The FS7-4W has a brass body with a 1-1/4 in NPT connection, SPDT switch rated at 7.4 A @ 120V (Full Load), and a hazardous location rating of Class I, Div 1 and 2, Group C, D. It fits pipe sizes from 1-1/4 in to 16 in.
Where to buy the McDonnell & Miller FS7-4W worldwide?
3G Electric supplies the McDonnell & Miller FS7-4W flow switch worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this item.
How to install a McDonnell & Miller paddle flow switch?
Install the FS7-4W in a horizontal pipe section with the paddle oriented against flow direction. Ensure the pipe is fully drained and the NPT connection is sealed with thread tape. Wire the SPDT switch per your control circuit, typically for pump start/stop or alarm.
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3G Electric supplies McDonnell & Miller insertion-style switches for liquids. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.