Flow Switches

  • FS251, General Purpose Flow Switch w/ NEMA 1 Encl.
    SKU: 120611
    Brand: Mcdonnell & Miller
    (10)
    $97.95 each
    $281.85 box of 3
    $93.95 each
    79
    Mon, Nov 5
    79
    QtyArrives
    79 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • FS4-3, 1" General Purpose Flow Switch - Paddle Style
    SKU: 114400
    Brand: Mcdonnell & Miller
    (4)
    $113.95 each
    $326.85 box of 3
    $108.95 each
    513
    Mon, Nov 5
    513
    QtyArrives
    513 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • $143.95 each
    $413.85 box of 3
    $137.95 each
    120
    Mon, Nov 5
    120
    QtyArrives
    120 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • $131.95 each
    $380.85 box of 3
    $126.95 each
    13
    Mon, Nov 5
    15
    QtyArrives
    13 Mon, Nov 5
    2 Tue, Nov 6 – Wed, Nov 7
    Questions? Call 1-888-757-4774
  • 1" Liquid Flow Switch (Set of 4 Paddles)
    SKU: F261KAH-V01C
    Brand: Johnson Controls
    $105.95 each
    $305.85 box of 3
    $101.95 each
    117
    Mon, Nov 5
    117
    QtyArrives
    117 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • 1" NPT Flow Switch (SS Paddles)
    SKU: F261MAH-V01C
    Brand: Johnson Controls
    (2)
    $139.95 each
    $401.85 box of 3
    $133.95 each
    57
    Mon, Nov 5
    57
    QtyArrives
    57 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • SPDT Adj. Differential Air Pressure Switch (.05"-12.0" W.C.)
    SKU: AFS-222-112
    Brand: Cleveland Controls
    (4)
    $28.95 each
    48
    Mon, Nov 5
    48
    QtyArrives
    48 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • OEM Pressure Sensing Switch (.25/1.0" W.C.)
    SKU: RSS-495-011
    Brand: Cleveland Controls
    (3)
    $24.95 each
    38
    Mon, Nov 5
    38
    QtyArrives
    38 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • SPDT Adj. Differential Air Pressure Switch (.05"-12.0" W.C.)
    SKU: AFS-145
    Brand: Cleveland Controls
    (1)
    $28.75 each
    64
    Mon, Nov 5
    64
    QtyArrives
    64 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • Air Flow Pressure Sensing Switch (.1/10"W.C.)
    SKU: NS2-0000-00
    Brand: Cleveland Controls
    (1)
    $21.15 each
    73
    Mon, Nov 5
    73
    QtyArrives
    73 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • 2-1/2" NPT Liquid Level Float Switch
    SKU: 9037HG33
    Brand: Square D
    $97.95 each
    3
    Mon, Nov 5
    3
    QtyArrives
    3 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • FS1, 1/2" Flow Switch
    SKU: 113200
    Brand: Mcdonnell & Miller
    (3)
    $179.95 each
    $518.85 box of 3
    $172.95 each
    38
    Mon, Nov 5
    38
    QtyArrives
    38 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • FS4-15SS, Stainless Steel Paddle Kit w/ 1", 2" 3", & 6" Paddle
    SKU: 310451
    Brand: Mcdonnell & Miller
    (1)
    $14.15 each
    $67.75 box of 5
    $13.55 each
    50
    Mon, Nov 5
    50
    QtyArrives
    50 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • FS5-3/4, 3/4" Flow Switch
    SKU: 114760
    Brand: Mcdonnell & Miller
    (2)
    $192.95 each
    $554.85 box of 3
    $184.95 each
    32
    Mon, Nov 5
    32
    QtyArrives
    32 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • FS-200-W NEMA-1 Paddle-Type Flow Switch
    SKU: 00063067
    Brand: Watts
    $159.95 each
    $307.90 box of 2
    $153.95 each
    4
    Mon, Nov 5
    4
    QtyArrives
    4 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • Alternator Liquid Level Switch (NEMA 1)
    SKU: 9038CG36
    Brand: Square D
    $273.95 each
    36
    Mon, Nov 5
    36
    QtyArrives
    36 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • SPDT Air Pressure Sensing Switch (.05" - 12.0" W.C.)
    SKU: AFS-A
    Brand: Cleveland Controls
    $31.95 each
    27
    Mon, Nov 5
    27
    QtyArrives
    27 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • 3/4" NPT Flow Switch Low Flow
    SKU: F261KFH-V01C
    Brand: Johnson Controls
    (6)
    $117.95 each
    $338.85 box of 3
    $112.95 each
    15
    Mon, Nov 5
    15
    QtyArrives
    15 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • $251.95 each
    13
    Mon, Nov 5
    13
    QtyArrives
    13 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • FS5-1, 1" Flow Switch
    SKU: 114780
    Brand: Mcdonnell & Miller
    (3)
    $192.95 each
    $554.85 box of 3
    $184.95 each
    15
    Mon, Nov 5
    15
    QtyArrives
    15 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • $34.15 each
    2
    Mon, Nov 5
    2
    QtyArrives
    2 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • $33.95 each
    9
    Mon, Nov 5
    9
    QtyArrives
    9 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • 1" Liquid Flow Switch (SS Paddles)
    SKU: F261MAL-V01C
    Brand: Johnson Controls
    $159.95 each
    $461.85 box of 3
    $153.95 each
    34
    Mon, Nov 5
    34
    QtyArrives
    34 Mon, Nov 5
    Questions? Call 1-888-757-4774
  • SPDT Air Pressure Switch Barbed Connector (.05" W.C.)
    SKU: DFS-221-112
    Brand: Cleveland Controls
    $22.95 each
    67
    Mon, Nov 5
    67
    QtyArrives
    67 Mon, Nov 5
    Questions? Call 1-888-757-4774

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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