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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
Category
Flow Switches
Available to Order
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Documents

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

Product Description

McDonnell & Miller Flow Switches.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

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

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.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
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
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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
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
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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 High flow capacity 1 2 NPT Single pole, double throw snap switch Switch compartment is completely
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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
1 NPT Two electrical knock-outs allows connection from either end Sensitivity adjusting screw makes flow adjustment easy Single pole, double throw snap
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1 NPT Two electrical knock-outs allows connection from either end Sensitivity adjusting screw makes flow adjustment easy Single pole, double throw snap
Paddle-type flow switch for liquids, installed inline in 1-inch pipe systems. Detects flow or no-flow conditions for pump protection, boiler low-water cutoff, and cooling water monitoring. Features 1-inch NPT connection and AC contact rating of 3.7 A at 240V full load
McDonnell & Miller
Paddle-type flow switch for liquids, installed inline in 1-inch pipe systems. Detects flow or no-flow conditions for pump protection, boiler low-water cutoff, and cooling water monitoring. Features 1-inch NPT connection and AC contact rating of 3.7 A at 240V full load
Brass inline flow switch for detecting liquid flow or no-flow conditions in piping systems. Features a 1 in NPT connection and SPDT switch rated at 22.2 A @ 240V (locked rotor). Suitable for use in HVAC, boiler, and industrial process lines to interlock pumps, alarms, or burners
McDonnell & Miller
Brass inline flow switch for detecting liquid flow or no-flow conditions in piping systems. Features a 1 in NPT connection and SPDT switch rated at 22.2 A @ 240V (locked rotor). Suitable for use in HVAC, boiler, and industrial process lines to interlock pumps, alarms, or burners

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In-line configuration eliminates need for a pipe tee Very high flow capacity Actuates at extremely low flow rate Sizes available 3 4 NPT 1
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1 NPT Connection Two electrical knock-outs allows connection from either end Sensitivity adjusting screw makes flow adjustment easy Single pole, double
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For general purpose low velocity applications where the most economical flow switch is desired Paddle fits 8 (203mm) minimum duct size Two electrical
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For industrial hazardous environment applications requiring a NEMA 7 (Class I, Division I, Group C and D) or NEMA 9 (Class II, Division I, Group E, F, and G)
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