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Flow Switches

132 Results Found that Include 132 Products

Results per page:  16 | 32 | 48
1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
3/4 FNPT General Purpose Liquid Flow Switch,
  • MCDONNELL & MILLER
  • 3/4 FNPT General Purpose Liquid Flow Switch, 3/4 FNPT General Purpose Liquid Flow Switch,
  • 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

3/4 FNPT x 3/4 FNPT Low Flow Flow Switch, 0.
1 MNPT Standard Flow Flow Switch, 2.5 gpm to 760
1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm
1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm
1 MNPT   General Purpose Switch,
  • MCDONNELL & MILLER
  • 1 MNPT General Purpose Switch, 1 MNPT General Purpose Switch,
  • 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  Industrial Flow Switch, Flow Increase 4.5 to 9.5&#x
1 1/4 MNPT Industrial/Heavy-duty Liquid Flow Flow Swit
3/4 FNPT Heavy-duty, High Sensitivity Flow Switch,
1 MNPT   General Purpose Switch,
  • MCDONNELL & MILLER
  • 1 MNPT General Purpose Switch, 1 MNPT General Purpose Switch,
  • 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

1 FNPT 1/3 HP, General Purpose, Electrically Operated
  • MCDONNELL & MILLER
  • 1 FNPT 1/3 HP, General Purpose, Electrically Operated Flow Switch, 1 FNPT 1/3 HP, General Purpose, Electrically Operated Flow Switch,
  • 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

1 MNPT Paddle Liquid Flow Switch, 15 to 48 gpm
  • GEMS SENSORS
  • 1 MNPT Paddle Liquid Flow Switch, 15 to 48 gpm 1 MNPT Paddle Liquid Flow Switch, 15 to 48 gpm
  • Item # 1AKZ4
  • Mfr. Model # FS-550 29609
  • Liquid Flow Switch, Paddle, Flow Rate 15-48 GPM, Connection Size (In.) 1 MNPT, Min. Ambient Temp. -30 F, Max....More

1 FNPT Slip PVC   Flow Protector,
  • TM

    Grainger Choice

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

1 1/4 MNPT Industrial/Heavy-duty Flow Switch,
  • MCDONNELL & MILLER
  • 1 1/4 MNPT Industrial/Heavy-duty Flow Switch, 1 1/4 MNPT Industrial/Heavy-duty Flow Switch,
  • Item # 4RC73
  • Mfr. Model # FS7-4SW
  • Industrial/Heavy-duty Switch, Min. Flow Rate 4.8 GPM, Max. Flow GPM 7.7, Connection Size (In.) 1 1/4 NPT,...More

3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm
  • GEMS SENSORS
  • 3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm 3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm
  • 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

1/4 FNPT Rotor Liquid Flow Switch, 0.1 to 5 gpm
  • GEMS SENSORS
  • 1/4 FNPT Rotor Liquid Flow Switch, 0.1 to 5 gpm 1/4 FNPT Rotor Liquid Flow Switch, 0.1 to 5 gpm
  • 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

1/4 FNPT Piston Liquid Flow Switch, 0.25 gpm
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 0.25 gpm 1/4 FNPT Piston Liquid Flow Switch, 0.25 gpm
  • Item # 1ALG3
  • Mfr. Model # FS-927 70821
  • Liquid Flow Switch, Piston, Flow Rate 0.25 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F,...More

3/8 MNPT Piston Liquid Flow Switch, 1 gpm
  • GEMS SENSORS
  • 3/8 MNPT Piston Liquid Flow Switch, 1 gpm 3/8 MNPT Piston Liquid Flow Switch, 1 gpm
  • Item # 1ALY1
  • Mfr. Model # FS-380 168434
  • Liquid Flow Switch, Piston, Flow Rate 1 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F, Max....More

1 FNPT Shuttle Liquid Flow Switch, 2 to 8 gpm
  • GEMS SENSORS
  • 1 FNPT Shuttle Liquid Flow Switch, 2 to 8 gpm 1 FNPT Shuttle Liquid Flow Switch, 2 to 8 gpm
  • Item # 1ALD7
  • Mfr. Model # FS-200 26838
  • Liquid Flow Switch, Shuttle, Flow Rate 2.0 to 8.0 GPM, Connection Size (In.) 1 FNPT, Min. Ambient Temp. -20...More

1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • GEMS SENSORS
  • 1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm 1/2 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • Item # 4JPJ1
  • Mfr. Model # FS-150 NC 0.5GPM
  • Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 1/2 MNPT, Switch Enclosure...More

Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm,
1 MNPT Paddle Liquid Flow Switch, 15 to 48 gpm
  • GEMS SENSORS
  • 1 MNPT Paddle Liquid Flow Switch, 15 to 48 gpm 1 MNPT Paddle Liquid Flow Switch, 15 to 48 gpm
  • 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

1/2 FNPT Rotor Liquid Flow Switch, 1.5 to 20 gpm
  • GEMS SENSORS
  • 1/2 FNPT Rotor Liquid Flow Switch, 1.5 to 20 gpm 1/2 FNPT Rotor Liquid Flow Switch, 1.5 to 20 gpm
  • 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

1 NPT Flow Switch, 26.4
  • IFM
  • 1 NPT Flow Switch, 26.4 1 NPT Flow Switch, 26.4
  • Item # 24JZ11
  • Mfr. Model # SBN346
  • Flow Switch, Min. Flow Rate (GPM) 1.32, Max. Flow GPM 26.4, Flow Rate 26.4, Connection Size (In.) 1 NPT,...More

3/8 MNPT Piston Liquid Flow Switch, 1.5 gpm
  • GEMS SENSORS
  • 3/8 MNPT Piston Liquid Flow Switch, 1.5 gpm 3/8 MNPT Piston Liquid Flow Switch, 1.5 gpm
  • Item # 1ALY8
  • Mfr. Model # FS-380 179995
  • Liquid Flow Switch, Piston, Flow Rate 1.5 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F, Max....More

1/2 FNPT x 1/2 FNPT Low Flow Flow Switch, 0.
3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm
  • GEMS SENSORS
  • 3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm 3/8 MNPT Piston Liquid Flow Switch, 0.15 gpm
  • Item # 1ALY4
  • Mfr. Model # FS-380 193482
  • Liquid Flow Switch, Piston, Flow Rate 0.15 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F,...More

3/4 FNPT Shuttle Liquid Flow Switch, 5 gpm
  • GEMS SENSORS
  • 3/4 FNPT Shuttle Liquid Flow Switch, 5 gpm 3/4 FNPT Shuttle Liquid Flow Switch, 5 gpm
  • Item # 1ALA7
  • Mfr. Model # FS-500 170235
  • Liquid Flow Switch, Shuttle, Flow Rate 5 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F, Max....More

3/8 MNPT Piston Liquid Flow Switch, 0.25 gpm
  • GEMS SENSORS
  • 3/8 MNPT Piston Liquid Flow Switch, 0.25 gpm 3/8 MNPT Piston Liquid Flow Switch, 0.25 gpm
  • Item # 1ALY5
  • Mfr. Model # FS-380 179992
  • Liquid Flow Switch, Piston, Flow Rate 0.25 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F,...More

1 FNPT Shuttle Liquid Flow Switch, 1 to 6 gpm
  • GEMS SENSORS
  • 1 FNPT Shuttle Liquid Flow Switch, 1 to 6 gpm 1 FNPT Shuttle Liquid Flow Switch, 1 to 6 gpm
  • 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

Flow Switch,
  • MCDONNELL & MILLER
  • Flow Switch, Flow Switch,
  • 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

Results per page:  16 | 32 | 48

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!

Note: Product availability is real-time basis and adjusted continuously. The product will be reserved for you when you complete your order. More