Description
McDonnell & Miller 120610 FS-254 – 1" NPT General Purpose Flow Switch with NEMA 4 Enclosure
Reliable Liquid Flow Detection with Weatherproof Protection
The McDonnell & Miller FS-254 is a 1" NPT general purpose liquid flow switch featuring a durable NEMA 4 enclosure for water-tight, dust-tight, and corrosion-resistant protection. Designed to reliably start or stop electrically operated equipment such as alarms, motors, signal lights, and automatic burners, this flow switch is a trusted replacement for popular models from Johnson/Penn, Potter/Taco, Watts, Hydrolevel, and others.
Equipped with an adjustable sensitivity screw and four stainless steel paddles (1", 2", 3", and 6"), the FS-254 provides versatile flow sensing with easy customization. The EPDM O-ring seal ensures long-lasting durability in a variety of applications.
Key Benefits:
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NEMA 4 enclosure protects against water and dust ingress
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Adjustable sensitivity for precise flow detection
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Includes four stainless steel paddles for multiple pipe sizes
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Single pole, double throw (SPDT) snap switch for reliable electrical switching
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Compatible with a wide range of industrial and HVAC applications
Applications:
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Industrial and commercial liquid flow monitoring
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Equipment control based on flow presence
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Replacement for NEMA 4 flow switches such as FS8-W
Specifications
| Attribute | Details |
|---|---|
| Part Number | 120610 FS-254 |
| Product Type | General Purpose Liquid Flow Switch |
| Connection Size | 1" NPT Threaded |
| Switch Type | Single Pole Double Throw (SPDT) |
| Amperage | 3.7A (120V), 7.4A (240V) |
| Voltage | 120V / 240V |
| Frequency | 50 / 60 Hz |
| Max Pressure | 160 PSI (11.2 kg/cm²) |
| Temperature Range | 32°F to 250°F (0°C to 121°C) |
| Material | Stainless Steel Paddles, EPDM O-ring Seal |
| Paddle Sizes Included | 1", 2", 3", 6" (25, 50, 80, 150 mm) |
| Enclosure Rating | NEMA 4 (Water and Dust Tight) |
