Flow Switches

  • FS251, General Purpose Flow Switch w/ NEMA 1 Encl.
    SKU: 120611
    Brand: Mcdonnell & Miller
    (9)
    $97.95 each
    $281.85 box of 3
    $93.95 each
    89
    Tue, Jul 31 – Wed, Aug 1
    162
    QtyArrives
    89 Tue, Jul 31 – Wed, Aug 1
    73 Wed, Aug 1
    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
    68
    Tue, Jul 31 – Wed, Aug 1
    446
    QtyArrives
    68 Tue, Jul 31 – Wed, Aug 1
    378 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • $143.95 each
    $413.85 box of 3
    $137.95 each
    35
    Tue, Jul 31 – Wed, Aug 1
    93
    QtyArrives
    35 Tue, Jul 31 – Wed, Aug 1
    58 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • $128.95 each
    $371.85 box of 3
    $123.95 each
    30
    Tue, Jul 31 – Wed, Aug 1
    49
    QtyArrives
    30 Tue, Jul 31 – Wed, Aug 1
    19 Fri, Aug 3 – Mon, Aug 6
    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
    28
    Tue, Jul 31 – Wed, Aug 1
    112
    QtyArrives
    28 Tue, Jul 31 – Wed, Aug 1
    84 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • 1" NPT Flow Switch (SS Paddles)
    SKU: F261MAH-V01C
    Brand: Johnson Controls
    $139.95 each
    $401.85 box of 3
    $133.95 each
    22
    Tue, Jul 31 – Wed, Aug 1
    55
    QtyArrives
    22 Tue, Jul 31 – Wed, Aug 1
    33 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • SPDT Adj. Differential Air Pressure Switch (.05"-12.0" W.C.)
    SKU: AFS-222-112
    Brand: Cleveland Controls
    (3)
    $28.95 each
    14
    Tue, Jul 31 – Wed, Aug 1
    25
    QtyArrives
    14 Tue, Jul 31 – Wed, Aug 1
    11 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • OEM Pressure Sensing Switch (.25/1.0" W.C.)
    SKU: RSS-495-011
    Brand: Cleveland Controls
    $24.95 each
    21
    Tue, Jul 31 – Wed, Aug 1
    33
    QtyArrives
    21 Tue, Jul 31 – Wed, Aug 1
    12 Wed, Aug 1
    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
    29
    Tue, Jul 31 – Wed, Aug 1
    62
    QtyArrives
    29 Tue, Jul 31 – Wed, Aug 1
    33 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • Air Flow Pressure Sensing Switch (.1/10"W.C.)
    SKU: NS2-0000-00
    Brand: Cleveland Controls
    $21.15 each
    13
    Tue, Jul 31 – Wed, Aug 1
    47
    QtyArrives
    13 Tue, Jul 31 – Wed, Aug 1
    34 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • 2-1/2" NPT Liquid Level Float Switch
    SKU: 9037HG33
    Brand: Square D
    $97.95 each
    11
    Tue, Jul 31 – Wed, Aug 1
    32
    QtyArrives
    11 Tue, Jul 31 – Wed, Aug 1
    21 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • FS-200-W NEMA-1 Paddle-Type Flow Switch
    SKU: 00063067
    Brand: Watts
    $144.95 each
    $277.90 box of 2
    $138.95 each
    10
    Tue, Jul 31 – Wed, Aug 1
    10
    QtyArrives
    10 Tue, Jul 31 – Wed, Aug 1
    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
    22
    Tue, Jul 31 – Wed, Aug 1
    53
    QtyArrives
    22 Tue, Jul 31 – Wed, Aug 1
    31 Wed, Aug 1
    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
    17
    Tue, Jul 31 – Wed, Aug 1
    39
    QtyArrives
    17 Tue, Jul 31 – Wed, Aug 1
    22 Wed, Aug 1
    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
    10
    Tue, Jul 31 – Wed, Aug 1
    33
    QtyArrives
    10 Tue, Jul 31 – Wed, Aug 1
    23 Wed, Aug 1
    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
    10
    Tue, Jul 31 – Wed, Aug 1
    25
    QtyArrives
    10 Tue, Jul 31 – Wed, Aug 1
    15 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • Alternator Liquid Level Switch (NEMA 1)
    SKU: 9038CG36
    Brand: Square D
    $273.95 each
    6
    Tue, Jul 31 – Wed, Aug 1
    22
    QtyArrives
    6 Tue, Jul 31 – Wed, Aug 1
    16 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • 3/4" NPT Flow Switch Low Flow
    SKU: F261KFH-V01C
    Brand: Johnson Controls
    $117.95 each
    $338.85 box of 3
    $112.95 each
    6
    Tue, Jul 31 – Wed, Aug 1
    23
    QtyArrives
    6 Tue, Jul 31 – Wed, Aug 1
    17 Wed, Aug 1
    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
    10
    Tue, Jul 31 – Wed, Aug 1
    38
    QtyArrives
    10 Tue, Jul 31 – Wed, Aug 1
    28 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • Air Pressure Sensing Switch w/ 0.52" WC
    SKU: RSS-495-421
    Brand: Cleveland Controls
    $54.95 each
    4
    Tue, Jul 31 – Wed, Aug 1
    13
    QtyArrives
    4 Tue, Jul 31 – Wed, Aug 1
    9 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • $251.95 each
    7
    Wed, Aug 1
    7
    QtyArrives
    7 Wed, Aug 1
    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
    3
    Tue, Jul 31 – Wed, Aug 1
    36
    QtyArrives
    3 Tue, Jul 31 – Wed, Aug 1
    33 Wed, Aug 1
    Questions? Call 1-888-757-4774
  • $55.95 each
    Thu, Aug 9 – Tue, Aug 14
    Arrives
    Thu, Aug 9 – Tue, Aug 14
    Questions? Call 1-888-757-4774 or LiveChat Img Live Chat
  • FS5-1, 1" Flow Switch
    SKU: 114780
    Brand: Mcdonnell & Miller
    (3)
    $192.95 each
    $554.85 box of 3
    $184.95 each
    11
    Tue, Jul 31 – Wed, Aug 1
    32
    QtyArrives
    11 Tue, Jul 31 – Wed, Aug 1
    21 Wed, Aug 1
    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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