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MCDONNELL & MILLER Flow Switch: Paddle, 1 in For Pipe Size, 1 in BSP, 1 in Connection Size - Inline Switches for Liquids
McDonnell & MillerInline Switches for Liquids

MCDONNELL & MILLER Flow Switch: Paddle, 1 in For Pipe Size, 1 in BSP, 1 in Connection Size

The MCDONNELL & MILLER FS8-WJ is a paddle-type flow switch for liquids, designed for inline installation in 1-inch pipes with a 1-inch BSP connection. It features a contact rating of 7.4 A at 120V AC (full load)…

SKU 3G-OTH-88455

Also listed as: FS8WJ · FS8 WJ

Brand
McDonnell & Miller
Item
Flow Switch: Paddle, 1 in For Pipe Size, 1 in BSP, 1 in Connection Size
Category
Inline Switches for Liquids
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

McDonnell & Miller
Manufacturer Part Number
FS8-WJ
Type
BSP
BSP
1 in
For Pipe Size
1 in
Connection Size
1 in
Contact Rating (AC)
7.4 A @ 120V (Full Load)

Technical Documents

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McDonnell & Miller Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The MCDONNELL & MILLER FS8-WJ is a paddle-type flow switch for liquids, designed for inline installation in 1-inch pipes with a 1-inch BSP connection. It features a contact rating of 7.4 A at 120V AC (full load). This switch is used to detect liquid flow in piping systems.

Frequently Asked Questions

What is the MCDONNELL & MILLER FS8-WJ flow switch used for?

The MCDONNELL & MILLER FS8-WJ is a paddle-type flow switch that detects liquid flow in piping systems. It is commonly used in HVAC, boiler, and industrial process applications to monitor flow and trigger alarms or control equipment when flow starts or stops.

What are the specifications of the MCDONNELL & MILLER FS8-WJ?

The FS8-WJ is a paddle flow switch for 1-inch pipes with a 1-inch BSP connection. It has a contact rating of 7.4 A at 120V AC (full load). The switch is designed for inline installation in liquid systems and is manufactured by MCDONNELL & MILLER.

Where to buy the MCDONNELL & MILLER FS8-WJ worldwide?

3G Electric supplies the MCDONNELL & MILLER FS8-WJ 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 the MCDONNELL & MILLER FS8-WJ flow switch?

Install the FS8-WJ in a horizontal pipe section with the paddle oriented correctly for flow direction. Ensure the pipe is 1-inch BSP threaded. Follow standard electrical safety practices for wiring the 7.4 A contact rating. Always consult the manufacturer's manual for torque and positioning details.

Used in

Common applications for McDonnell & Miller
Steam boiler low-water cutoff — McDonnell & Miller inline flow switches (e.g., FS-1) for automatic burner shutdown
Cooling water flow monitoring — McDonnell & Miller insertion-style switches (e.g., FS4-3D) in large-diameter pipes
Hazardous-area process lines — McDonnell & Miller FS7-4E with NEMA 7/9 enclosure for Class I, Div 1 locations
HVAC chilled water systems — McDonnell & Miller FS6-1 inline switch for pump flow verification
Industrial wastewater treatment — McDonnell & Miller FS4-3S stainless steel switch for corrosive fluid flow detection
Boiler feedwater control — McDonnell & Miller FS8-WJ with BSP connections for international installations

McDonnell & Miller Products

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.

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