Description
McDonnell & Miller 113200 FS1 – ½" NPT High Sensitivity Flow Switch
Compact Inline Flow Switch for Low to Moderate Flow Rates
The McDonnell & Miller FS1 is a ½" NPT high sensitivity flow switch designed for general purpose liquid flow applications requiring precise detection at low to moderate flow rates. Ideal for HVAC, hydronic heating, water, fuel oil, and various viscous liquids, this inline switch eliminates the need for a pipe tee and offers a compact, space-saving design.
Featuring a sealed switch compartment to protect internal components from liquid exposure, the FS1 includes an adjustable sensitivity screw for easy flow adjustment and a reliable single pole, double throw (SPDT) snap switch. Optional features include BSPT threaded connections and gold-plated contacts for enhanced performance.
Key Benefits:
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Inline design for easy installation without pipe tees
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High sensitivity for accurate flow detection at low rates
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Sealed switch compartment safeguards against liquid ingress
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Adjustable sensitivity for precise calibration
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Suitable for a variety of liquids including fuel oil and viscous fluids
Applications:
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HVAC and hydronic heating systems
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Water flow monitoring
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Fuel oil and process liquids
Specifications
| Attribute | Details |
|---|---|
| Part Number | 113200 FS1 |
| Product Type | High Sensitivity Liquid Flow Switch |
| Connection Size | ½" NPT Threaded |
| Flow Range | 0.41 to 1.81 GPM (Gallons per Minute) |
| Switch Type | Single Pole Double Throw (SPDT) |
| Amperage | 7.4A (240V), 3.7A (120V) |
| Voltage | 120V / 240V |
| Frequency | 50 / 60 Hz |
| Max Pressure | 100 PSI (7 kg/cm²) |
| Temperature Range | 32°F to 225°F (0°C to 107°C) |
| Optional Features | BSPT threads, gold plated contacts |
