McDonnell & Miller FS7-4E Insertion-Style Flow Switch for Liquids
The MCDONNELL & MILLER FS7-4E is a paddle-type flow switch for liquids, designed for pipe sizes from 1 1/4 in to 16 in. It features a NEMA 7/9 enclosure and is rated for hazardous locations Class I, Div 1 and 2…
SKU 3G-OTH-93340
Also listed as: FS74E · FS7 4E
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Product Description
The MCDONNELL & MILLER FS7-4E is a paddle-type flow switch for liquids, designed for pipe sizes from 1 1/4 in to 16 in. It features a NEMA 7/9 enclosure and is rated for hazardous locations Class I, Div 1 and 2, Group C, D. The switch has a SPDT contact with a full-load AC rating of 7.4 A @ 120V and a 1 1/4 in NPT connection.
Frequently Asked Questions
What is the McDonnell & Miller FS7-4E flow switch used for?
The McDonnell & Miller FS7-4E is a paddle-type flow switch for liquids, used to detect flow or no-flow conditions in pipes from 1 1/4 in to 16 in. It is suitable for hazardous locations rated Class I, Div 1 and 2, Group C, D, such as oil refineries and chemical plants.
What are the specifications of the McDonnell & Miller FS7-4E?
The FS7-4E has a brass body with a 1 1/4 in NPT connection, a NEMA 7/9 enclosure, and a SPDT contact rated at 7.4 A full load at 120V AC. It is designed for pipe sizes up to 16 in and carries a hazardous location rating of Class I, Div 1 and 2, Group C, D.
Where to buy the McDonnell & Miller FS7-4E worldwide?
3G Electric supplies the McDonnell & Miller FS7-4E flow switch worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source and deliver this item to any country.
How to install a McDonnell & Miller paddle flow switch?
Install the FS7-4E in a horizontal pipe with the paddle oriented against flow direction. Ensure the pipe is fully filled and the switch is wired per the SPDT diagram. For hazardous locations, follow Class I, Div 1, Group C, D wiring practices. Always consult the manufacturer's manual for torque and clearance.
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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.