MCDONNELL & MILLER Flow Switch: Paddle, 1 1/4 in/16 in For Pipe Size, Brass
The MCDONNELL & MILLER FS7-4SW is a paddle-type flow switch for liquids, designed as an insertion-style switch for pipe sizes up to 16 inches. It features a brass body with a 1 1/4 inch NPT connection and an SPDT…
SKU 3G-OTH-93327
Also listed as: FS74SW · FS7 4SW
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.
Need installation or engineering help?
Ask a question
Product Description
The MCDONNELL & MILLER FS7-4SW is a paddle-type flow switch for liquids, designed as an insertion-style switch for pipe sizes up to 16 inches. It features a brass body with a 1 1/4 inch NPT connection and an SPDT contact rated at 7.4 A @ 120V (Full Load). This switch carries a hazardous location rating of Class II, Div 1 and 2, Group E, F, G.
Frequently Asked Questions
What is the MCDONNELL & MILLER FS7-4SW flow switch used for?
The MCDONNELL & MILLER FS7-4SW is a paddle-type flow switch for liquids, used to detect flow or no-flow conditions in pipes up to 16 inches. It is suitable for industrial applications requiring hazardous location ratings, such as Class II, Div 1 and 2, Group E, F, G environments.
What are the specifications of the MCDONNELL & MILLER FS7-4SW?
The FS7-4SW has a brass body with a 1 1/4 in NPT connection, SPDT contacts, and a contact rating of 7.4 A @ 120V (Full Load). It is rated for pipe sizes from 1 1/4 in to 16 in and carries a hazardous location rating of Class II, Div 1 and 2, Group E, F, G.
Where to buy the MCDONNELL & MILLER FS7-4SW worldwide?
3G Electric supplies the MCDONNELL & MILLER FS7-4SW flow switch worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.
How to install a MCDONNELL & MILLER paddle flow switch?
Install the FS7-4SW by inserting the paddle into the pipe through a 1 1/4 in NPT fitting, ensuring the paddle is sized for the pipe diameter. Orient the switch vertically or horizontally per manufacturer guidelines, and wire the SPDT contacts according to your control circuit. Always follow local electrical codes.
Used in
Common applications for McDonnell & MillerMcDonnell & Miller Products
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.
