Skip Content

Filter Results By

Flow Rate
Operating Velocity Range (FPM)
Switch Type
Voltage
Material of Construction
For Drinking Water Applications
For Drinking Water Applications in CA, VT, MD, LA
Connection Size (In.)
Brand
Price
Shop By
Ratings

Flow Switches

133 Results Found that Include 133 Products

Product availability based on selecting either shipping or pick up and a location. Dismiss
Results per page:  16 | 32 | 48
General Purpose Flow Switch,NEMA1
  • MCDONNELL & MILLER
  • General Purpose Flow Switch, NEMA1 General Purpose Flow Switch,NEMA1
  • 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

General Purpose Flow Switch,NEMA4
  • MCDONNELL & MILLER
  • General Purpose Flow Switch, NEMA4 General Purpose Flow Switch,NEMA4
  • 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

Flow Switch, 3.5 to 600,SPDT
  • TACO
  • Flow Switch, 3.5 to 600, SPDT Flow Switch, 3.5 to 600,SPDT
  • 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

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

Liquid Flow Switch,Piston,SPST,20VA
  • GEMS SENSORS
  • Liquid Flow Switch, Piston, SPST, 20VA Liquid Flow Switch,Piston,SPST,20VA
  • Item # 1ALY2
  • Mfr. Model # FS-380 168435
  • Liquid Flow Switch, Piston, Flow Rate 1.5 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F, Max....More

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

Flow Switch
Liquid Flow Switch,Paddle,SPDT,20VA
  • GEMS SENSORS
  • Liquid Flow Switch, Paddle, SPDT, 20VA Liquid Flow Switch,Paddle,SPDT,20VA
  • 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

Liquid Flow Switch,Piston,SPST,20VA
  • GEMS SENSORS
  • Liquid Flow Switch, Piston, SPST, 20VA Liquid Flow Switch,Piston,SPST,20VA
  • 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
Switch,Flow
  • MCDONNELL & MILLER
  • Switch, Flow Switch,Flow
  • Item # 1RF64
  • Mfr. Model # FS6-3/4
  • Heavy-duty, High Sensitivity Switch, Min. Flow Rate 0.12 GPM, Max. Flow GPM 2.5, Connection Size (In.) 3/4...More

Flow Switch
Liquid Flow Switch,Shuttle,SPDT,20VA
  • GEMS SENSORS
  • Liquid Flow Switch, Shuttle, SPDT, 20VA Liquid Flow Switch,Shuttle,SPDT,20VA
  • 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

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

Flow Switch, 3.5 to 600 fpm,SPDT
  • TACO
  • Flow Switch, 3.5 to 600 fpm, SPDT Flow Switch, 3.5 to 600 fpm,SPDT
  • 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

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

Flow Switch, 3.5 to 600 fpm,SPDT
  • TACO
  • Flow Switch, 3.5 to 600 fpm, SPDT Flow Switch, 3.5 to 600 fpm,SPDT
  • 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

Liquid Flow Switch,Rotor,SPDT,35mA/95mA
  • GEMS SENSORS
  • Liquid Flow Switch, Rotor, SPDT, 35mA/95mA Liquid Flow Switch,Rotor,SPDT,35mA/95mA
  • 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

Liquid Flow Switch,Paddle,SPDT,20VA
  • GEMS SENSORS
  • Liquid Flow Switch, Paddle, SPDT, 20VA Liquid Flow Switch,Paddle,SPDT,20VA
  • 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

Liquid Flow Switch,Shuttle,SPDT,20VA
  • GEMS SENSORS
  • Liquid Flow Switch, Shuttle, SPDT, 20VA Liquid Flow Switch,Shuttle,SPDT,20VA
  • 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

Liquid Flow Switch,Rotor,SPDT,35mA/95mA
  • GEMS SENSORS
  • Liquid Flow Switch, Rotor, SPDT, 35mA/95mA Liquid Flow Switch,Rotor,SPDT,35mA/95mA
  • 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

Liquid Flow Switch,Piston,SPST,20VA
  • GEMS SENSORS
  • Liquid Flow Switch, Piston, SPST, 20VA Liquid Flow Switch,Piston,SPST,20VA
  • 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

Flow Switch,,5 cm/sec,1 In FNPT
  • GEMS SENSORS
  • Flow Switch, , 5 cm/sec, 1 In FNPT Flow Switch,,5 cm/sec,1 In FNPT
  • Item # 20X871
  • Mfr. Model # 20X871
  • Flow Switch, Thermal Dispersion, Flow Rate 5 cm/sec, Connection Size 1 In FNPT, Max. Ambient Temp. 140...More

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

Liquid Flow Switch,Shuttle,SPST, NO,20VA
  • GEMS SENSORS
  • Liquid Flow Switch, Shuttle, SPST, NO, 20VA Liquid Flow Switch,Shuttle,SPST, NO,20VA
  • Item # 1AKZ8
  • Mfr. Model # FS-500 170231
  • Liquid Flow Switch, Shuttle, Flow Rate 0.25 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F,...More

Liquid Flow Switch,Piston,SPST,10VA
  • GEMS SENSORS
  • Liquid Flow Switch, Piston, SPST, 10VA Liquid Flow Switch,Piston,SPST,10VA
  • 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

Liquid Flow Switch,Piston,SPDT,20VA
  • GEMS SENSORS
  • Liquid Flow Switch, Piston, SPDT, 20VA Liquid Flow Switch,Piston,SPDT,20VA
  • Item # 1ALD8
  • Mfr. Model # FS-10798 25364
  • Liquid Flow Switch, Piston, Flow Rate 0.5 to 20.0 GPM, Connection Size (In.) 1/2 FNPT, Min. Ambient Temp. -20...More

Switch,Liquid Flow
  • MCDONNELL & MILLER
  • Switch, Liquid Flow Switch,Liquid Flow
  • Item # 4RC74
  • Mfr. Model # FS7-4E
  • Industrial/Heavy-duty Switch, Min. Flow Rate 4.8 GPM, Max. Flow GPM 7.7, Connection Size (In.) 1 1/4 NPT,...More

Liquid Flow Switch,Piston,SPST,20VA
  • GEMS SENSORS
  • Liquid Flow Switch, Piston, SPST, 20VA Liquid Flow Switch,Piston,SPST,20VA
  • 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

Flow Switch
Liquid Flow Switch, 1.0 GPM, NO
  • GEMS SENSORS
  • Liquid Flow Switch, 1.0 GPM, NO Liquid Flow Switch, 1.0 GPM, NO
  • Item # 4JPJ2
  • Mfr. Model # FS-150 NO 1.0GPM
  • Liquid Flow Switch, Piston, Flow Rate 1.0 GPM, Connection Size (In.) 1/2 MNPT, Switch Enclosure...More

Flow Switch, 3.5 to 600 fpm,SPDT
  • TACO
  • Flow Switch, 3.5 to 600 fpm, SPDT Flow Switch, 3.5 to 600 fpm,SPDT
  • 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

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