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Flow Switches

134 products found

An efficient flow switch from Grainger can accurately monitor the flow of air, steam or liquid, then send a signal to a pump to turn itself on or itself shut off. Liquid flow switches can be used to help regulate systems such hydronic heating, plumbing, water cooling equipment, liquid transfer, water treatment and more. Air flow switches can be used to help operate cleanroom filter systems, duct type heating, air ventilating and more. Shop Grainger for dependable flow switches!Close

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  • 1 MNPT General Purpose Switch,

    Brand
    MCDONNELL & MILLER
    Item #
    2RUL3
    Mfr. Model #
    FS251
    1 MNPT   General Purpose Switch,
    Web Price $138.50 / each
  • 3/4 FNPT General Purpose Liquid Flow Switch,

    Brand
    MCDONNELL & MILLER
    Item #
    4RC67
    Mfr. Model #
    FS5-3/4
    3/4 FNPT General Purpose Liquid Flow Switch,
    Web Price $222.50 / each
  • 1 MNPT General Purpose Switch,

    Brand
    MCDONNELL & MILLER
    Item #
    2RUL4
    Mfr. Model #
    FS254
    1 MNPT   General Purpose Switch,
    Web Price $193.50 / each
  • 1/4 FNPT Piston Liquid Flow Switch, 0.1 gpm

    Brand
    GEMS SENSORS
    Item #
    1ALG2
    Mfr. Model #
    FS-927 70820
    1/4 FNPT Piston Liquid Flow Switch, 0.1 gpm
    Web Price $102.00 / each
  • 1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760 gpm

    Brand
    JOHNSON CONTROLS
    Item #
    35LZ21
    Mfr. Model #
    F261MAH-V01C
    1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
    Web Price $187.00 / each
  • 1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760 gpm

    Brand
    JOHNSON CONTROLS
    Item #
    35LZ18
    Mfr. Model #
    F261KAH-V01C
    1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
    Web Price $148.00 / each
  • 1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760 gpm

    Brand
    JOHNSON CONTROLS
    Item #
    35LZ20
    Mfr. Model #
    F261MAL-V01C
    1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
    Web Price $207.00 / each
  • 1/2 FNPT Rotor Liquid Flow Switch, 1.5 to 20 gpm

    Brand
    GEMS SENSORS
    Item #
    1AMB5
    Mfr. Model #
    RFS 156268
    1/2 FNPT Rotor Liquid Flow Switch, 1.5 to 20 gpm
    Web Price $286.00 / each
  • 1 FNPT 7.4 Amps, High Sensitivity Flow Switch,

    Brand
    MCDONNELL & MILLER
    Item #
    4RC68
    Mfr. Model #
    FS6-1
    1 FNPT 7.4 Amps, High Sensitivity Flow Switch,
    Web Price $366.00 / each
  • 1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm, Flow Decrease 3.5 to 7 gpm

    Brand
    TACO
    Item #
    29YM30
    Mfr. Model #
    IFS01BF-1
    1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm
    Web Price $135.50 / each
  • 1/4 FNPT Rotor Liquid Flow Switch, 0.1 to 5 gpm

    Brand
    GEMS SENSORS
    Item #
    1AMB2
    Mfr. Model #
    RFS 155425
    1/4 FNPT Rotor Liquid Flow Switch, 0.1 to 5 gpm
    Web Price $208.00 / each
  • 1 FNPT Shuttle Liquid Flow Switch, 1 to 6 gpm

    Brand
    GEMS SENSORS
    Item #
    1ALD5
    Mfr. Model #
    FS-200 26615
    1 FNPT Shuttle Liquid Flow Switch, 1 to 6 gpm
    Web Price $217.00 / each
  • 1 MNPT Paddle Liquid Flow Switch, 15 to 48 gpm

    Brand
    GEMS SENSORS
    Item #
    1AKZ6
    Mfr. Model #
    FS-550 29608
    1 MNPT Paddle Liquid Flow Switch, 15 to 48 gpm
    Web Price $331.50 / each
  • 1 FNPT 1/3 HP, General Purpose, Electrically Operated Flow Switch,

    Brand
    MCDONNELL & MILLER
    Item #
    1RF63
    Mfr. Model #
    FS5-1
    1 FNPT 1/3 HP, General Purpose, Electrically Operated
    Web Price $246.50 / each
  • Flow Switch,

    Brand
    MCDONNELL & MILLER
    Item #
    4RC76
    Mfr. Model #
    AF-1
    Flow Switch,
    Web Price $207.00 / each
  • 3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm

    Brand
    GEMS SENSORS
    Item #
    1ALV7
    Mfr. Model #
    FS-380 181130
    3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm
    Web Price $111.00 / each
  • 3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm

    Brand
    GEMS SENSORS
    Item #
    1ALV9
    Mfr. Model #
    FS-380 168433
    3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm
    Web Price $111.50 / each
  • 1 1/4 MNPT Industrial/Heavy-duty Flow Switch,

    Brand
    MCDONNELL & MILLER
    Item #
    4RC72
    Mfr. Model #
    FS7-4W
    1 1/4 MNPT Industrial/Heavy-duty Flow Switch,
    Web Price $483.50 / each
  • 1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm, Flow Decrease 3.5 to 7 gpm

    Brand
    TACO
    Item #
    29YM34
    Mfr. Model #
    IFSWSBF-1
    1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm
    Web Price $177.50 / each
  • 1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm

    Brand
    GEMS SENSORS
    Item #
    4JPH9
    Mfr. Model #
    FS-150 NO 0.5GPM
    1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm
    Web Price $90.50 / each
  • 3/4 FNPT Shuttle Liquid Flow Switch, 0.5 gpm

    Brand
    GEMS SENSORS
    Item #
    1ALA1
    Mfr. Model #
    FS-500 170232
    3/4 FNPT Shuttle Liquid Flow Switch, 0.5 gpm
    Web Price $74.50 / each
  • 1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm, Flow Decrease 3.5 to 7 gpm

    Brand
    TACO
    Item #
    29YM36
    Mfr. Model #
    IFS01BR-1
    1  Industrial Flow Switch, Flow Increase 4.5 to 9.5&#x
    Web Price $160.00 / each
  • 1 FNPT Slip PVC Flow Protector,

    Brand
    DAYTON
    Item #
    1DGZ7
    Mfr. Model #
    1DGZ7
    1 FNPT Slip PVC   Flow Protector,
    Web Price $256.50 / each
  • 3/4 FNPT Rotor Liquid Flow Switch, 5 to 30 gpm

    Brand
    GEMS SENSORS
    Item #
    1AMB6
    Mfr. Model #
    RFS 180395
    3/4 FNPT Rotor Liquid Flow Switch, 5 to 30 gpm
    Web Price $286.00 / each
  • 3/4 NPT Flow Switch, 26.4

    Brand
    IFM
    Item #
    24JZ10
    Mfr. Model #
    SBN333
    3/4 NPT Flow Switch, 26.4
    Web Price $326.50 / each
  • 1 FNPT High Sensitivity Flow Switch,

    Brand
    MCDONNELL & MILLER
    Item #
    4RC69
    Mfr. Model #
    FS6-W-1
    1 FNPT High Sensitivity Flow Switch,
    Web Price $429.00 / each
  • 1/2 FNPT Rotor Liquid Flow Switch, 1.5 to 20 gpm

    Brand
    GEMS SENSORS
    Item #
    1AMB3
    Mfr. Model #
    RFS 155485
    1/2 FNPT Rotor Liquid Flow Switch, 1.5 to 20 gpm
    Web Price $208.00 / each
  • 1/4 FNPT Rotor Liquid Flow Switch, 0.1 to 5 gpm

    Brand
    GEMS SENSORS
    Item #
    1AMB4
    Mfr. Model #
    RFS 156265
    1/4 FNPT Rotor Liquid Flow Switch, 0.1 to 5 gpm
    Web Price $288.50 / each
  • 3/4 FNPT Shuttle Liquid Flow Switch, 0.25 gpm

    Brand
    GEMS SENSORS
    Item #
    1AKZ8
    Mfr. Model #
    FS-500 170231
    3/4 FNPT Shuttle Liquid Flow Switch, 0.25 gpm
    Web Price $75.25 / each
  • Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm, Flow Decrease 3.5 to 7 gpm

    Brand
    TACO
    Item #
    29YM40
    Mfr. Model #
    IFSWSBR-1
    Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm,
    Web Price $187.50 / each
  • 1 FNPT Shuttle Liquid Flow Switch, 5 to 15 gpm

    Brand
    GEMS SENSORS
    Item #
    1ALD6
    Mfr. Model #
    FS-200 26616
    1 FNPT Shuttle Liquid Flow Switch, 5 to 15 gpm
    Web Price $217.50 / each
  • 1 1/4 MNPT Industrial/Heavy-duty Liquid Flow Flow Switch,

    Brand
    MCDONNELL & MILLER
    Item #
    4RC70
    Mfr. Model #
    FS7-4
    1 1/4 MNPT Industrial/Heavy-duty Liquid Flow Flow Swit
    Web Price $400.00 / each
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Note: Product availability is real-time basis and adjusted continuously. The product will be reserved for you when you complete your order. More