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Flow Switches

134 results found that include 134 products

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,
    1 MNPT   General Purpose Switch,
    • MCDONNELL & MILLER
    • Item # 2RUL3
    • Mfr. Model # FS251
    • General Purpose Switch, Min. Flow Rate 5.8 GPM, Max. Flow GPM 131, Connection Size (In.) 1 NPT, Switch...More

  • 3/4 FNPT General Purpose Liquid Flow Switch,
    3/4 FNPT General Purpose Liquid Flow Switch,
    • MCDONNELL & MILLER
    • Item # 4RC67
    • Mfr. Model # FS5-3/4
    • General Purpose Switch, Min. Flow Rate 1.5 GPM, Max. Flow GPM 15, Connection Size (In.) 3/4 FNPT, Switch...More

  • 1 MNPT   General Purpose Switch,
    1 MNPT   General Purpose Switch,
    • MCDONNELL & MILLER
    • Item # 2RUL4
    • Mfr. Model # FS254
    • General Purpose Switch, Min. Flow Rate 5.8 GPM, Max. Flow GPM 131, Connection Size (In.) 1 NPT, Switch...More

  • 1/4 FNPT Piston Liquid Flow Switch, 0.1 gpm
    1/4 FNPT Piston Liquid Flow Switch, 0.1 gpm
    • GEMS SENSORS
    • Item # 1ALG2
    • Mfr. Model # FS-927 70820
    • Liquid Flow Switch, Piston, Flow Rate 0.1 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F, Max....More

  • 1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
    1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
    • JOHNSON CONTROLS
    • Item # 35LZ21
    • Mfr. Model # F261MAH-V01C
    • Flow Switch

  • 1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm
    1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm
    • TACO
    • Item # 29YM30
    • Mfr. Model # IFS01BF-1
    • Flow Switch, Industrial, Max. HP 120VAC, 1/8 HP, 240VAC, 1/4 HP, 1 Phase, 60 Hz, Min. Flow Rate (GPM) 4.5,...More

  • Flow Switch,
    Flow Switch,
    • MCDONNELL & MILLER
    • Item # 4RC76
    • Mfr. Model # AF-1
    • Switch Enclosure NEMA1, Min. Ambient Temp. 32 F, Max. Ambient Temp. 300 F, Operating Velocity Range 910 to...More

  • 1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
    1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
    • JOHNSON CONTROLS
    • Item # 35LZ20
    • Mfr. Model # F261MAL-V01C
    • Flow Switch

  • 1/4 FNPT Rotor Liquid Flow Switch, 0.1 to 5 gpm
    1/4 FNPT Rotor Liquid Flow Switch, 0.1 to 5 gpm
    • GEMS SENSORS
    • Item # 1AMB2
    • Mfr. Model # RFS 155425
    • Liquid Flow Switch, Rotor, Flow Rate 0.1 to 5.0 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20...More

  • 1  Industrial Flow Switch, Flow Increase 4.5 to 9.5&#x
    1  Industrial Flow Switch, Flow Increase 4.5 to 9.5&#x
    • TACO
    • Item # 29YM36
    • Mfr. Model # IFS01BR-1
    • Flow Switch, Industrial, Max. HP 120VAC, 1/8 HP, 240VAC, 1/4 HP, 1 Phase, 60 Hz, Min. Flow Rate (GPM) 4.5,...More

  • 1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm
    1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm
    • GEMS SENSORS
    • Item # 4JPH9
    • Mfr. Model # FS-150 NO 0.5GPM
    • Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 1/2 MNPT, Switch Enclosure...More

  • 1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
    1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
    • JOHNSON CONTROLS
    • Item # 35LZ18
    • Mfr. Model # F261KAH-V01C
    • Flow Switch

  • 1/2 FNPT Rotor Liquid Flow Switch, 1.5 to 20 gpm
    1/2 FNPT Rotor Liquid Flow Switch, 1.5 to 20 gpm
    • GEMS SENSORS
    • Item # 1AMB5
    • Mfr. Model # RFS 156268
    • Liquid Flow Switch, Rotor, Flow Rate 1.5 to 20.0 GPM, Connection Size (In.) 1/2 FNPT, Min. Ambient Temp. -20...More

  • 1 FNPT 7.4 Amps, High Sensitivity Flow Switch,
    1 FNPT 7.4 Amps, High Sensitivity Flow Switch,
    • MCDONNELL & MILLER
    • Item # 4RC68
    • Mfr. Model # FS6-1
    • 7.4 Amps, High Sensitivity Switch, Min. Flow Rate 0.12 GPM, Max. Flow GPM 2.5, Connection Size (In.) 1 NPT,...More

  • 1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm
    1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm
    • TACO
    • Item # 29YM34
    • Mfr. Model # IFSWSBF-1
    • Flow Switch, Industrial, Max. HP 1/3 HP, 1 Phase, 60 Hz, Min. Flow Rate (GPM) 4.5, Max. Flow GPM 1500, Flow...More

  • 1 MNPT Paddle Liquid Flow Switch, 15 to 48 gpm
    1 MNPT Paddle Liquid Flow Switch, 15 to 48 gpm
    • GEMS SENSORS
    • Item # 1AKZ6
    • Mfr. Model # FS-550 29608
    • Liquid Flow Switch, Paddle, Flow Rate 15-48 GPM, Connection Size (In.) 1 MNPT, Min. Ambient Temp. -30 F, Max....More

  • 3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm
    3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm
    • GEMS SENSORS
    • Item # 1ALV9
    • Mfr. Model # FS-380 168433
    • Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F, Max....More

  • 1 FNPT 1/3 HP, General Purpose, Electrically Operated
    1 FNPT 1/3 HP, General Purpose, Electrically Operated
    • MCDONNELL & MILLER
    • Item # 1RF63
    • Mfr. Model # FS5-1
    • 1/3 HP, General Purpose, Electrically Operated, Max. HP -, - Phase, - Hz, Min. Flow Rate (GPM) 1.5, Max. Flow...More

  • 3/4 FNPT Shuttle Liquid Flow Switch, 0.5 gpm
    3/4 FNPT Shuttle Liquid Flow Switch, 0.5 gpm
    • GEMS SENSORS
    • Item # 1ALA1
    • Mfr. Model # FS-500 170232
    • Liquid Flow Switch, Shuttle, Flow Rate 0.5 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F,...More

  • 1 1/4 MNPT Industrial/Heavy-duty Flow Switch,
    1 1/4 MNPT Industrial/Heavy-duty Flow Switch,
    • MCDONNELL & MILLER
    • Item # 4RC72
    • Mfr. Model # FS7-4W
    • Industrial/Heavy-duty Switch, Min. Flow Rate 4.8 GPM, Max. Flow GPM 7.7, Connection Size (In.) 1 1/4 NPT,...More

  • 1 FNPT Shuttle Liquid Flow Switch, 1 to 6 gpm
    1 FNPT Shuttle Liquid Flow Switch, 1 to 6 gpm
    • GEMS SENSORS
    • Item # 1ALD5
    • Mfr. Model # FS-200 26615
    • Liquid Flow Switch, Shuttle, Flow Rate 1.0 to 6.0 GPM, Connection Size (In.) 1 FNPT, Min. Ambient Temp. -20...More

  • 1 FNPT Slip PVC   Flow Protector,
    1 FNPT Slip PVC   Flow Protector,
    • TM

      Grainger Choice

    • DAYTON
    • Item # 1DGZ7
    • Mfr. Model # 1DGZ7
    • Flow Protector, Max. HP 3/4, 1 Phase, 50/60 Hz, Min. Flow Rate 1 GPM, Connection Size (In.) 1 FNPT Slip PVC,...More

  • 3/4 FNPT Rotor Liquid Flow Switch, 5 to 30 gpm
    3/4 FNPT Rotor Liquid Flow Switch, 5 to 30 gpm
    • GEMS SENSORS
    • Item # 1AMB6
    • Mfr. Model # RFS 180395
    • Liquid Flow Switch, Rotor, Flow Rate 5.0 to 30.0 GPM, Connection Size (In.) 3/4 FNPT, Min. Ambient Temp. -20...More

  • 1 FNPT High Sensitivity Flow Switch,
    1 FNPT High Sensitivity Flow Switch,
    • MCDONNELL & MILLER
    • Item # 4RC69
    • Mfr. Model # FS6-W-1
    • High Sensitivity Switch, Min. Flow Rate 0.12 GPM, Max. Flow GPM 2.5, Connection Size (In.) 1 NPT, Switch...More

  • 1/4 FNPT Rotor Liquid Flow Switch, 0.1 to 5 gpm
    1/4 FNPT Rotor Liquid Flow Switch, 0.1 to 5 gpm
    • GEMS SENSORS
    • Item # 1AMB4
    • Mfr. Model # RFS 156265
    • Liquid Flow Switch, Rotor, Flow Rate 0.1 to 5.0 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20...More

  • 3/4 NPT Flow Switch, 26.4
    3/4 NPT Flow Switch, 26.4
    • IFM
    • Item # 24JZ10
    • Mfr. Model # SBN333
    • Flow Switch, Min. Flow Rate (GPM) 0.26, Max. Flow GPM 6.6, Flow Rate 26.4, Connection Size (In.) 3/4 NPT,...More

  • 1/2 FNPT Rotor Liquid Flow Switch, 1.5 to 20 gpm
    1/2 FNPT Rotor Liquid Flow Switch, 1.5 to 20 gpm
    • GEMS SENSORS
    • Item # 1AMB3
    • Mfr. Model # RFS 155485
    • Liquid Flow Switch, Rotor, Flow Rate 1.5 to 20.0 GPM, Connection Size (In.) 1/2 FNPT, Min. Ambient Temp. -20...More

  • 3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm
    3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm
    • GEMS SENSORS
    • Item # 1ALV7
    • Mfr. Model # FS-380 181130
    • Liquid Flow Switch, Piston, Flow Rate 0.15 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F,...More

  • 1 1/4 MNPT Industrial/Heavy-duty Liquid Flow Flow Swit
    1 1/4 MNPT Industrial/Heavy-duty Liquid Flow Flow Swit
    • MCDONNELL & MILLER
    • Item # 4RC70
    • Mfr. Model # FS7-4
    • Industrial/Heavy-duty Liquid Flow Switch, Min. Flow Rate 4.8 GPM, Max. Flow GPM 7.7, Connection Size (In.) 1...More

  • 3/4 FNPT Shuttle Liquid Flow Switch, 1 gpm
    3/4 FNPT Shuttle Liquid Flow Switch, 1 gpm
    • GEMS SENSORS
    • Item # 1ALA3
    • Mfr. Model # FS-500 170233
    • Liquid Flow Switch, Shuttle, Flow Rate 1 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F, Max....More

  • 3/4 FNPT x 3/4 FNPT Low Flow Flow Switch, 0.
    3/4 FNPT x 3/4 FNPT Low Flow Flow Switch, 0.
    • JOHNSON CONTROLS
    • Item # 35LZ13
    • Mfr. Model # F261KFH-V01C
    • Flow Switch

  • Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm,
    Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm,
    • TACO
    • Item # 29YM40
    • Mfr. Model # IFSWSBR-1
    • Flow Switch, Industrial, Max. HP 1/3 HP, 1 Phase, 60 Hz, Min. Flow Rate (GPM) 4.5, Max. Flow GPM 1500, Flow...More

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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