Flow Switches

  • FS251, General Purpose Flow Switch w/ NEMA 1 Encl.
    SKU: 120611
    Brand: Mcdonnell & Miller
    (11)
    $97.95 each
    $284.85 box of 3
    $94.95 each
    54
    Wed, May 1
    169
    QtyArrives
    54 Wed, May 1
    115 Thu, May 2
    Questions? Call 1-888-757-4774
  • FS4-3, 1" General Purpose Flow Switch - Paddle Style
    SKU: 114400
    Brand: Mcdonnell & Miller
    (4)
    $115.95 each
    $335.85 box of 3
    $111.95 each
    91
    Wed, May 1
    358
    QtyArrives
    91 Wed, May 1
    267 Thu, May 2
    Questions? Call 1-888-757-4774
  • $168.95 each
    $488.85 box of 3
    $162.95 each
    29
    Wed, May 1
    92
    QtyArrives
    29 Wed, May 1
    63 Thu, May 2
    Questions? Call 1-888-757-4774
  • 1" Liquid Flow Switch (Set of 4 Paddles)
    SKU: F261KAH-V01C
    Brand: Johnson Controls
    $105.95 each
    $299.85 box of 3
    $99.95 each
    29
    Wed, May 1
    75
    QtyArrives
    29 Wed, May 1
    46 Thu, May 2
    Questions? Call 1-888-757-4774
  • $131.95 each
    $380.85 box of 3
    $126.95 each
    25
    Wed, May 1
    36
    QtyArrives
    25 Wed, May 1
    11 Fri, May 3 – Mon, May 6
    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
    22
    Wed, May 1
    22
    QtyArrives
    22 Wed, May 1
    Questions? Call 1-888-757-4774
  • 1" NPT Flow Switch (SS Paddles)
    SKU: F261MAH-V01C
    Brand: Johnson Controls
    (3)
    $149.95 each
    $431.85 box of 3
    $143.95 each
    11
    Wed, May 1
    25
    QtyArrives
    11 Wed, May 1
    14 Thu, May 2
    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
    23
    Wed, May 1
    27
    QtyArrives
    23 Wed, May 1
    4 Thu, May 2
    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
    23
    Wed, May 1
    23
    QtyArrives
    23 Wed, May 1
    Questions? Call 1-888-757-4774
  • 2-1/2" NPT Liquid Level Float Switch
    SKU: 9037HG33
    Brand: Square D
    (1)
    $97.95 each
    18
    Wed, May 1
    58
    QtyArrives
    18 Wed, May 1
    40 Thu, May 2
    Questions? Call 1-888-757-4774
  • Pressure Switch .05" WC
    SKU: DFS-221-347
    Brand: Cleveland Controls
    (1)
    $33.95 each
    14
    Wed, May 1
    15
    QtyArrives
    14 Wed, May 1
    1 Thu, May 2
    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
    9
    Wed, May 1
    32
    QtyArrives
    9 Wed, May 1
    23 Thu, May 2
    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
    18
    Wed, May 1
    29
    QtyArrives
    18 Wed, May 1
    11 Thu, May 2
    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
    15
    Wed, May 1
    49
    QtyArrives
    15 Wed, May 1
    34 Thu, May 2
    Questions? Call 1-888-757-4774
  • Alternator Liquid Level Switch (NEMA 1)
    SKU: 9038CG36
    Brand: Square D
    $273.95 each
    20
    Wed, May 1
    26
    QtyArrives
    20 Wed, May 1
    6 Thu, May 2
    Questions? Call 1-888-757-4774
  • FS-200-W NEMA-1 Paddle-Type Flow Switch
    SKU: 00063067
    Brand: Watts
    $191.95 each
    $367.90 box of 2
    $183.95 each
    10
    Wed, May 1
    10
    QtyArrives
    10 Wed, May 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)
    $16.25 each
    $77.75 box of 5
    $15.55 each
    24
    Wed, May 1
    52
    QtyArrives
    24 Wed, May 1
    28 Thu, May 2
    Questions? Call 1-888-757-4774
  • $33.95 each
    22
    Wed, May 1
    23
    QtyArrives
    22 Wed, May 1
    1 Thu, May 2
    Questions? Call 1-888-757-4774
  • JD-2 Air Pressure Switch, .07 to 1.7" W.C. (Blue)
    SKU: JD-2-BLUE
    Brand: Antunes
    (1)
    $62.95 each
    575
    Thu, May 2
    575
    QtyArrives
    575 Thu, May 2
    Questions? Call 1-888-757-4774
  • FS5-3/4, 3/4" Flow Switch
    SKU: 114760
    Brand: Mcdonnell & Miller
    (2)
    $192.95 each
    $557.85 box of 3
    $185.95 each
    11
    Wed, May 1
    21
    QtyArrives
    11 Wed, May 1
    10 Thu, May 2
    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
    8
    Wed, May 1
    36
    QtyArrives
    8 Wed, May 1
    28 Thu, May 2
    Questions? Call 1-888-757-4774
  • $55.95 each
    604
    Thu, May 2
    604
    QtyArrives
    604 Thu, May 2
    Questions? Call 1-888-757-4774
  • SPDT General Purpose Air Sensing Switch (.05" to 12.0" W.C.)
    SKU: AFS-222-121
    Brand: Cleveland Controls
    (1)
    $29.95 each
    23
    Wed, May 1
    34
    QtyArrives
    23 Wed, May 1
    11 Thu, May 2
    Questions? Call 1-888-757-4774
  • $34.15 each
    15
    Wed, May 1
    18
    QtyArrives
    15 Wed, May 1
    3 Thu, May 2
    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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