We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
Mcdonnell & Miller Series FS5 General Purpose Liquid Flow Switches
Mcdonnell & MillerFlow Switches

Mcdonnell & Miller Series FS5 General Purpose Liquid Flow Switches

McDonnell & Miller Flow Switches.

SKU 3G-OTH-02755

Brand
Mcdonnell & Miller
Item
Series FS5 General Purpose Liquid Flow Switches
Part Number
FS5
Category
Flow Switches
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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.

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

McDonnell & Miller Flow Switches.

Frequently Asked Questions

What is the McDonnell & Miller FS5 flow switch used for?

The McDonnell & Miller FS5 flow switch is used to detect liquid flow or no-flow conditions in industrial piping systems. It is commonly applied in HVAC, boiler, and process control applications to protect equipment by interlocking pumps, alarms, or burners when flow is lost.

What are the specifications of the McDonnell & Miller FS5 flow switch?

The FS5 flow switch features an in-line configuration that eliminates the need for a pipe tee. Available sizes are 3/4 NPT and 1 NPT. Materials of construction include brass, carbon steel, and EPDM elastomer. It is designed for liquid service and is manufactured by McDonnell & Miller.

Where to buy the McDonnell & Miller FS5 flow switch in Singapore?

You can source the McDonnell & Miller FS5 flow switch in Singapore through 3G Electric. We handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this item.

How to install the McDonnell & Miller FS5 flow switch?

Install the FS5 flow switch in a horizontal pipe section with the paddle oriented correctly for the flow direction. Ensure the pipe is fully filled with liquid and free of air pockets. Follow standard wiring practices for the switch contacts and verify operation after installation.

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
Not sure this is the right part? Photo-identify it

Mcdonnell & Miller Products

3G Electric supplies Mcdonnell & Miller flow switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from McDonnell & Miller

View all McDonnell & Miller parts
In-line configuration eliminates need for a pipe tee High flow capacity 1 2 NPT Single pole, double throw snap switch Switch compartment is completely
McDonnell & Miller
In-line configuration eliminates need for a pipe tee High flow capacity 1 2 NPT Single pole, double throw snap switch Switch compartment is completely
In-line configuration eliminates need for a pipe tee Sizes available 3 4 NPT 1 NPT Paddles available for low, medium or high flow Two electrical
McDonnell & Miller
In-line configuration eliminates need for a pipe tee Sizes available 3 4 NPT 1 NPT Paddles available for low, medium or high flow Two electrical
For low velocity applications Paddle fits 8 (203mm) minimum duct size Two electrical knock-outs allow connection from either end Brass, steel and aluminum
McDonnell & Miller
For low velocity applications Paddle fits 8 (203mm) minimum duct size Two electrical knock-outs allow connection from either end Brass, steel and aluminum
For general purpose applications with medium and high velocity requirements Paddle fits 8 (203mm) minimum duct size, or 6 (152mm) if trimmed Brass
McDonnell & Miller
For general purpose applications with medium and high velocity requirements Paddle fits 8 (203mm) minimum duct size, or 6 (152mm) if trimmed Brass
For general purpose low velocity applications where the most economical flow switch is desired Paddle fits 8 (203mm) minimum duct size Two electrical
McDonnell & Miller
For general purpose low velocity applications where the most economical flow switch is desired Paddle fits 8 (203mm) minimum duct size Two electrical
1 1 4 NPT Brass with sealed tube construction Single pole, double throw snap switch Magnetic switching mechanism eliminates need for
McDonnell & Miller
1 1 4 NPT Brass with sealed tube construction Single pole, double throw snap switch Magnetic switching mechanism eliminates need for
1 NPT Two electrical knock-outs allows connection from either end Sensitivity adjusting screw makes flow adjustment easy Single pole, double throw snap
McDonnell & Miller
1 NPT Two electrical knock-outs allows connection from either end Sensitivity adjusting screw makes flow adjustment easy Single pole, double throw snap

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first