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Flow Switches

  • FS251, General Purpose Flow Switch w/ NEMA 1 Encl. Product Image
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    FS251, General Purpose Flow Switch w/ NEMA 1 Encl. 120611 FS251, General Purpose Flow Switch w/ NEMA 1 Encl.
    SKU: 120611
    Brand: Mcdonnell & Miller
    (13)
    $98.99 each
    258
    Wed, Mar 4
    258
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    258 Wed, Mar 4
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  • FS4-3, 1" General Purpose Flow Switch - Paddle Style Product Image
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    FS4-3, 1" General Purpose Flow Switch - Paddle Style 114400 FS4-3, 1" General Purpose Flow Switch - Paddle Style
    Contains Lead
    SKU: 114400
    Brand: Mcdonnell & Miller
    (4)
    $115.99 each
    805
    Wed, Mar 4
    805
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    805 Wed, Mar 4
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  • FS254, General Purpose Flow Switch w/ NEMA 4 Encl. (Replaces FS8-W) Product Image
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    FS254, General Purpose Flow Switch w/ NEMA 4 Encl. (Replaces FS8-W) 120610 FS254, General Purpose Flow Switch w/ NEMA 4 Encl. (Replaces FS8-W)
    SKU: 120610
    Brand: Mcdonnell & Miller
    (6)
    $186.99 each
    143
    Wed, Mar 4
    143
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    143 Wed, Mar 4
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  • Brass Flow Switch w/ Flexible Paddles<br>(Single Switch) Product Image
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    Brass Flow Switch w/ Flexible Paddles (Single Switch) IFS01BF-1 Brass Flow Switch w/ Flexible Paddles (Single Switch)
    SKU: IFS01BF-1
    Brand: Taco
    (4)
    $109.99 each
    33
    Wed, Mar 4
    49
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    33 Wed, Mar 4
    16 Fri, Mar 6 – Mon, Mar 9
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  • 1" Liquid Flow Switch<br>(Set of 4 Paddles) Product Image
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    1" Liquid Flow Switch (Set of 4 Paddles) F261KAH-V01C 1" Liquid Flow Switch (Set of 4 Paddles)
    SKU: F261KAH-V01C
    Brand: Johnson Controls
    $112.99 each
    109
    Wed, Mar 4
    109
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    109 Wed, Mar 4
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  • OEM Pressure Sensing Switch (.25/1.0" W.C.) Product Image
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    OEM Pressure Sensing Switch (.25/1.0" W.C.) RSS-495-011 OEM Pressure Sensing Switch (.25/1.0" W.C.)
    SKU: RSS-495-011
    Brand: Cleveland Controls
    (4)
    $23.99 each
    200
    Wed, Mar 4
    200
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    200 Wed, Mar 4
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  • Air Flow Pressure Sensing Switch (.1/10"W.C.) Product Image
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    Air Flow Pressure Sensing Switch (.1/10"W.C.) NS2-0000-00 Air Flow Pressure Sensing Switch (.1/10"W.C.)
    SKU: NS2-0000-00
    Brand: Cleveland Controls
    (1)
    $19.99 each
    52
    Wed, Mar 4
    52
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    52 Wed, Mar 4
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  • 1" NPT Flow Switch<br>(SS Paddles) Product Image
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    1" NPT Flow Switch (SS Paddles) F261MAH-V01C 1" NPT Flow Switch (SS Paddles)
    SKU: F261MAH-V01C
    Brand: Johnson Controls
    (3)
    $154.99 each
    73
    Wed, Mar 4
    73
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    73 Wed, Mar 4
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  • SPDT Adj. Differential<br>Air Pressure Switch<br>(.05"-12.0" W.C.) Product Image
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    SPDT Adj. Differential Air Pressure Switch (.05"-12.0" W.C.) AFS-222-112 SPDT Adj. Differential Air Pressure Switch (.05"-12.0" W.C.)
    SKU: AFS-222-112
    Brand: Cleveland Controls
    (4)
    $29.19 each
    84
    Wed, Mar 4
    84
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    84 Wed, Mar 4
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  • JD-2 Vacuum/Pressure Switch w/ Auto Reset Air Differential, 1-4" W.C. (Grey) Product Image
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    JD-2 Vacuum/Pressure Switch w/ Auto Reset Air Differential, 1-4" W.C. (Grey) JD-2-GREY JD-2 Vacuum/Pressure Switch w/ Auto Reset Air Differential, 1-4" W.C. (Grey)
    SKU: JD-2-GREY
    Brand: Antunes
    $58.49 each
    206
    Wed, Mar 4
    206
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    206 Wed, Mar 4
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  • JD-2 Air Pressure Switch, .07 to 1.7" W.C. (Blue) Product Image
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    JD-2 Air Pressure Switch, .07 to 1.7" W.C. (Blue) JD-2-BLUE JD-2 Air Pressure Switch, .07 to 1.7" W.C. (Blue)
    SKU: JD-2-BLUE
    Brand: Antunes
    (1)
    $66.99 each
    143
    Wed, Mar 4
    143
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    143 Wed, Mar 4
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  • Pressure Switch .05" WC Product Image
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    Pressure Switch .05" WC DFS-221-347 Pressure Switch .05" WC
    SKU: DFS-221-347
    Brand: Cleveland Controls
    (1)
    $32.49 each
    32
    Wed, Mar 4
    32
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    32 Wed, Mar 4
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  • SPDT Air Pressure Sensing Switch<br>(.05" - 12.0" W.C.) Product Image
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    SPDT Air Pressure Sensing Switch (.05" - 12.0" W.C.) AFS-A SPDT Air Pressure Sensing Switch (.05" - 12.0" W.C.)
    SKU: AFS-A
    Brand: Cleveland Controls
    $30.99 each
    60
    Wed, Mar 4
    60
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    60 Wed, Mar 4
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  • FS5-3/4, 3/4" Flow Switch Product Image
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    FS5-3/4, 3/4" Flow Switch 114760 FS5-3/4, 3/4" Flow Switch
    SKU: 114760
    Brand: Mcdonnell & Miller
    (3)
    $193.99 each
    52
    Wed, Mar 4
    52
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    52 Wed, Mar 4
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  • FS1, 1/2" Flow Switch Product Image
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    FS1, 1/2" Flow Switch 113200 FS1, 1/2" Flow Switch
    SKU: 113200
    Brand: Mcdonnell & Miller
    (3)
    $174.99 each
    74
    Wed, Mar 4
    74
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    74 Wed, Mar 4
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  • Brass Flow Switch NEMA4 Flexible w/ Paddles<br>(Small Turning Radius) Product Image
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    Brass Flow Switch NEMA4 Flexible w/ Paddles (Small Turning Radius) IFSWSBF-1 Brass Flow Switch NEMA4 Flexible w/ Paddles (Small Turning Radius)
    SKU: IFSWSBF-1
    Brand: Taco
    (1)
    $156.99 each
    22
    Wed, Mar 4
    22
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    22 Wed, Mar 4
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  • 2-1/2" NPT Liquid Level Float Switch Product Image
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    2-1/2" NPT Liquid Level Float Switch 9037HG33 2-1/2" NPT Liquid Level Float Switch
    SKU: 9037HG33
    Brand: Square D
    (2)
    $93.99 each
    56
    Wed, Mar 4
    56
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    56 Wed, Mar 4
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  • SPDT General Purpose<br>Air Sensing Switch<br>(.05" to 12.0" W.C.) Product Image
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    SPDT General Purpose Air Sensing Switch (.05" to 12.0" W.C.) AFS-222-121 SPDT General Purpose Air Sensing Switch (.05" to 12.0" W.C.)
    SKU: AFS-222-121
    Brand: Cleveland Controls
    (1)
    $28.69 each
    123
    Wed, Mar 4
    123
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    123 Wed, Mar 4
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  • Packard Field Adjustable SPDT Switch Kit Product Image
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    Packard Field Adjustable SPDT Switch Kit PS000 Packard Field Adjustable SPDT Switch Kit
    SKU: PS000
    Brand: Cleveland Controls
    $19.99 each
    56
    Wed, Mar 4
    56
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    56 Wed, Mar 4
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  • FS5-1, 1" Flow Switch Product Image
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    FS5-1, 1" Flow Switch 114780 FS5-1, 1" Flow Switch
    SKU: 114780
    Brand: Mcdonnell & Miller
    (6)
    $198.99 each
    56
    Wed, Mar 4
    56
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    56 Wed, Mar 4
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  • SPDT Adj. Differential<br>Air Pressure Switch<br>(.05"-12.0" W.C.) Product Image
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    SPDT Adj. Differential Air Pressure Switch (.05"-12.0" W.C.) AFS-145 SPDT Adj. Differential Air Pressure Switch (.05"-12.0" W.C.)
    SKU: AFS-145
    Brand: Cleveland Controls
    (1)
    $27.59 each
    76
    Wed, Mar 4
    76
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    76 Wed, Mar 4
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  • Air Flow Pressure Sensing Switch w/ Bleed Hole (.1/10"W.C.) Product Image
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    Air Flow Pressure Sensing Switch w/ Bleed Hole (.1/10"W.C.) NS2-0000-01 Air Flow Pressure Sensing Switch w/ Bleed Hole (.1/10"W.C.)
    SKU: NS2-0000-01
    Brand: Cleveland Controls
    $19.99 each
    58
    Wed, Mar 4
    58
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    58 Wed, Mar 4
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  • Air Sensing Switch Kit Product Image
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    Air Sensing Switch Kit RSS-498-13 Air Sensing Switch Kit
    SKU: RSS-498-13
    Brand: Cleveland Controls
    (1)
    $23.99 each
    65
    Wed, Mar 4
    65
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    65 Wed, Mar 4
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  • Alternator Liquid Level Switch, 2.63" Hinge Post, 5-1/8" Tank Connection Product Image
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    Alternator Liquid Level Switch, 2.63" Hinge Post, 5-1/8" Tank Connection 9038DG8 Alternator Liquid Level Switch, 2.63" Hinge Post, 5-1/8" Tank Connection
    SKU: 9038DG8
    Brand: Square D
    $235.99 each
    26
    Wed, Mar 4
    26
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    26 Wed, Mar 4
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Resources

Articles

  • A flow switch is an instrument that monitors the flow of steam, air, or liquid. The flow switch sends a signal to a device, such as a pump, to turn on or shut off. Flow switches can be used for air conditioning, heating and hydronic systems, among other applications.

    Air flow switches are used in applications that require low to high velocity, providing an economical way to detect change or loss of air flow velocity. This change or loss may be caused by a closed damper or fan inlet, loose fan wheel, slipped or broken fan belt, dirty or clogged filter, or an overload on a fan motor switch.

    Liquid flow switches have a universal design and serve a wider range of applications, such as starting or stopping electrically operated equipment like signal lights, alarms, motors, and automatic burners. In addition, liquid flow switches are used for general purpose applications with environmental exposure or applications requiring a water-tight or dust-tight flow switch. The liquid-flow F61 Series flow switch, manufactured by Johnson Controls, responds to fluid flow in lines carrying water, ethylene glycol, or other nonhazardous fluids. It also responds to low fluid flow rates in applications with pipe sizes under 1" trade size.

    Our website offers a vast selection of McDonnell & Miller Johnson Controls, Watts. and Taco flow switches that suit a wide range of residential, commercial, and industrial applications.

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