McDonnell & Miller FS4-3T3-1 Inline Paddle Flow Switch for Liquids, 1 in NPT
The MCDONNELL & MILLER FS4-3T3-1 is a paddle-type flow switch for liquids, designed for inline installation in 1-inch pipe systems. It features a 1-inch NPT connection and an AC contact rating of 3.7 A at 240V full load.
SKU 3G-OTH-88606
Also listed as: FS43T31 · FS4 3T3 1
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 FS4-3T3-1 is a paddle-type flow switch for liquids, designed for inline installation in 1-inch pipe systems. It features a 1-inch NPT connection and an AC contact rating of 3.7 A at 240V full load.
Frequently Asked Questions
What is the McDonnell & Miller FS4-3T3-1 flow switch used for?
The McDonnell & Miller FS4-3T3-1 is a paddle-type flow switch for liquids, used to detect flow or no-flow conditions in 1-inch pipe systems. Common applications include pump protection, boiler low-water cutoff, and cooling water monitoring in industrial HVAC, process, and power generation systems.
What are the specifications of the McDonnell & Miller FS4-3T3-1?
The FS4-3T3-1 is a 1-inch NPT inline paddle flow switch for liquids. It has a 1-inch pipe size, 1-inch NPT connection, and an AC contact rating of 3.7 A at 240V full load. The manufacturer part number is FS4-3T3-1, and it is designed for 1-inch pipe systems.
Where to buy the McDonnell & Miller FS4-3T3-1 worldwide?
3G Electric supplies the McDonnell & Miller FS4-3T3-1 flow switch to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this genuine McDonnell & Miller part.
How to install a McDonnell & Miller FS4-3T3-1 paddle flow switch?
Install the FS4-3T3-1 in a horizontal pipe section with the paddle oriented against flow direction. Use thread sealant on the 1-inch NPT connection and ensure the pipe is fully drained before installation. Wire the switch per the contact rating (3.7 A at 240V AC) and test for proper actuation at desired flow rate.
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3G Electric supplies McDonnell & Miller inline switches for liquids. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.