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Flow Switches

132 Results Found that Include 132 Products

Results per page:  16 | 32 | 48
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 # 1ALV8
  • Mfr. Model # FS-380 168432
  • Liquid Flow Switch, Piston, Flow Rate 0.25 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F,...More

3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • GEMS SENSORS
  • 3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm 3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • Item # 1ALV3
  • Mfr. Model # FS-380P 197082
  • Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 3/8 MNPT, Max. Ambient Temp. 212 F, Max....More

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

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

1/2 FNPT x 1/2 FNPT Low Flow Flow Switch, 0.
3/4 FNPT Shuttle Liquid Flow Switch, 1 gpm
  • GEMS SENSORS
  • 3/4 FNPT Shuttle Liquid Flow Switch, 1 gpm 3/4 FNPT Shuttle Liquid Flow Switch, 1 gpm
  • 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 Thermal Dispersion Flow Switch, 5 cm/sec
  • GEMS SENSORS
  • 3/4 FNPT Thermal Dispersion Flow Switch, 5 cm/sec 3/4 FNPT Thermal Dispersion Flow Switch, 5 cm/sec
  • Item # 20X867
  • Mfr. Model # 230500-2-5
  • Flow Switch, Thermal Dispersion, Flow Rate 5 cm/sec, Connection Size 3/4 In FNPT, Max. Ambient Temp. 140...More

1 FNPT Shuttle Liquid Flow Switch, 5 to 15 gpm
  • GEMS SENSORS
  • 1 FNPT Shuttle Liquid Flow Switch, 5 to 15 gpm 1 FNPT Shuttle Liquid Flow Switch, 5 to 15 gpm
  • Item # 1ALD6
  • Mfr. Model # FS-200 26616
  • Liquid Flow Switch, Shuttle, Flow Rate 5.0 to 15.0 GPM, Connection Size (In.) 1 FNPT, Min. Ambient Temp. -20...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 # 1ALV1
  • Mfr. Model # FS-380P 209876
  • Liquid Flow Switch, Piston, Flow Rate 0.15 GPM, Connection Size (In.) 3/8 MNPT, Max. Ambient Temp. 212 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 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

1-1/2 FNPT Thermal Dispersion Flow Switch, 20 cm/sec
  • GEMS SENSORS
  • 1-1/2 FNPT Thermal Dispersion Flow Switch, 20 cm/sec 1-1/2 FNPT Thermal Dispersion Flow Switch, 20 cm/sec
  • Item # 20X876
  • Mfr. Model # 230500-4-20
  • Flow Switch, Thermal Dispersion, Flow Rate 20 cm/sec, Connection Size 1-1/2 In FNPT, Max. Ambient Temp. 140...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 # 1ALY7
  • Mfr. Model # FS-380 179994
  • Liquid Flow Switch, Piston, Flow Rate 1 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F, Max....More

1/4 FNPT Piston Liquid Flow Switch, 50 cc/min
  • GEMS SENSORS
  • 1/4 FNPT Piston Liquid Flow Switch, 50 cc/min 1/4 FNPT Piston Liquid Flow Switch, 50 cc/min
  • Item # 1ALU2
  • Mfr. Model # FS-926 26951
  • Liquid Flow Switch, Piston, Flow Rate 50 cc/min, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F,...More

9/16-18 UNF Piston Liquid Flow Switch, 0.25 gpm
  • GEMS SENSORS
  • 9/16-18 UNF Piston Liquid Flow Switch, 0.25 gpm 9/16-18 UNF Piston Liquid Flow Switch, 0.25 gpm
  • Item # 1ALB8
  • Mfr. Model # FS-4 122353
  • Liquid Flow Switch, Piston, Flow Rate 0.25 GPM, Connection Size (In.) 9/16-18 UNF, Max. Ambient Temp. 225 F,...More

1 Industrial Flow Switch, Flow Increase 4.5 to 9.5 gpm
1 FNPT 7.4 Amps, High Sensitivity Flow Switch,
  • MCDONNELL & MILLER
  • 1 FNPT 7.4 Amps, High Sensitivity Flow Switch, 1 FNPT 7.4 Amps, High Sensitivity Flow Switch,
  • 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 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

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

3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • GEMS SENSORS
  • 3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm 3/8 MNPT Piston Liquid Flow Switch, 0.5 gpm
  • 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

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