Filter Results By

Flow Rate
  • View MoreView Less
Operating Velocity Range (FPM)
Switch Type
  • View MoreView Less
Material of Construction
  • View MoreView Less
Voltage
  • View MoreView Less
For Drinking Water Applications
For Drinking Water Applications in CA, VT, MD, LA
Brand
Price
  • View MoreView Less
Shop By
Ratings

Flow Switches

129 Results Found that Include 129 Products 

 |  Results per page: 16 | 32 | 48

General Purpose Flow Switch, NEMA1

MCDONNELL & MILLER

Grainger Item # 2RUL3 | Mfr. Model # FS251

Catalog Page # 3752 (PDF)

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

Grainger Item # 2RUL4 | Mfr. Model # FS254

Catalog Page # 3752 (PDF)

General Purpose Switch, Min. Flow Rate 5.8 GPM, Max. Flow GPM 131, Connection Size (In.) 1 NPT, Switch...More

Switch, Liquid Flow

MCDONNELL & MILLER

Grainger Item # 4RC67 | Mfr. Model # FS5-3/4

Catalog Page # 3752 (PDF)

General Purpose Switch, Min. Flow Rate 1.5 GPM, Max. Flow GPM 15, Connection Size (In.) 3/4 FNPT, Switch...More

Flow Switch, 1 In MNPT

JOHNSON CONTROLS

Grainger Item # 40G308 | Mfr. Model # F61KB-11C

Catalog Page # 4243 (PDF)

Liquid Flow Switch, General Purpose Switch, Max. HP 1, 1 Phase, 60 Hz, Min. Flow Rate (GPM) 2.5, Max. Flow...More

Switch, Flow

MCDONNELL & MILLER

Grainger Item # 1RF63 | Mfr. Model # FS5-1

Catalog Page # 3752 (PDF)

1/3 HP, General Purpose, Electrically Operated, Max. HP -, - Phase, - Hz, Min. Flow Rate (GPM) 1.5, Max. Flow...More

Flow Switch, 1 In MNPT

JOHNSON CONTROLS

Grainger Item # 40G311 | Mfr. Model # F61MB-1C

Catalog Page # 4243 (PDF)

Liquid Flow Switch, General Purpose Switch, Max. HP 1, 1 Phase, 60 Hz, Min. Flow Rate (GPM) 2.5, Max. Flow...More

Switch, Liquid Flow

MCDONNELL & MILLER

Grainger Item # 4RC70 | Mfr. Model # FS7-4

Catalog Page # 3752 (PDF)

Industrial/Heavy-duty Liquid Flow Switch, Min. Flow Rate 4.8 GPM, Max. Flow GPM 7.7, Connection Size (In.) 1...More

Flow Switch, 1 In MNPT

JOHNSON CONTROLS

Grainger Item # 40G312 | Mfr. Model # F61MG-1C

Catalog Page # 4243 (PDF)

Liquid Flow Switch, General Purpose Switch, Max. HP 1, 1 Phase, 60 Hz, Min. Flow Rate (GPM) 2.5, Max. Flow...More

Liquid Flow Switch, Shuttle, SPDT, 20VA

GEMS SENSORS

Grainger Item # 1ALD5 | Mfr. Model # FS-200 26615

Catalog Page # 3760 (PDF)

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

Grainger Item # 1RF64 | Mfr. Model # FS6-3/4

Catalog Page # 3752 (PDF)

Heavy-duty, High Sensitivity Switch, Min. Flow Rate 0.12 GPM, Max. Flow GPM 2.5, Connection Size (In.) 3/4...More

Liquid Flow Switch, Rotor, SPDT, 35mA/95mA

GEMS SENSORS

Grainger Item # 1AMB3 | Mfr. Model # RFS 155485

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Rotor, Flow Rate 1.5 to 20.0 GPM, Connection Size (In.) 1/2 FNPT, Min. Ambient Temp. -20...More

Liquid Flow Switch, Shuttle, SPST, NO, 20VA

GEMS SENSORS

Grainger Item # 1ALA3 | Mfr. Model # FS-500 170233

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Shuttle, Flow Rate 1 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F, Max....More

Liquid Flow Switch, Piston, SPST, 20VA

GEMS SENSORS

Grainger Item # 1ALV9 | Mfr. Model # FS-380 168433

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F, Max....More

Liquid Flow Switch, Shuttle, SPDT, 20VA

GEMS SENSORS

Grainger Item # 1ALD6 | Mfr. Model # FS-200 26616

Catalog Page # 3760 (PDF)

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, Piston, SPST, 20VA

GEMS SENSORS

Grainger Item # 1ALY1 | Mfr. Model # FS-380 168434

Catalog Page # NA

Liquid Flow Switch, Piston, Flow Rate 1 GPM, Connection Size (In.) 3/8 MNPT, Min. Ambient Temp. -20 F, Max....More

Liquid Flow Switch, Piston, SPST, 20VA

GEMS SENSORS

Grainger Item # 1ALG2 | Mfr. Model # FS-927 70820

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Piston, Flow Rate 0.1 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F, Max....More

Liquid Flow Switch, Piston, SPST, 20VA

GEMS SENSORS

Grainger Item # 1ALG4 | Mfr. Model # FS-927 70822

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 1/4 FNPT, Min. Ambient Temp. -20 F, Max....More

Switch, Flow

MCDONNELL & MILLER

Grainger Item # 1RF65 | Mfr. Model # FS6-W-3/4

Catalog Page # 3752 (PDF)

High Sensitivity Switch, Min. Flow Rate 0.12 GPM, Max. Flow GPM 2.5, Connection Size (In.) 3/4 NPT, Switch...More

Liquid Flow Switch, Shuttle, SPST, NO, 20VA

GEMS SENSORS

Grainger Item # 1AKZ8 | Mfr. Model # FS-500 170231

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Shuttle, Flow Rate 0.25 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F,...More

Liquid Flow Switch, Paddle, SPDT, 20VA

GEMS SENSORS

Grainger Item # 1AKZ4 | Mfr. Model # FS-550 29609

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Paddle, Flow Rate 15-48 GPM, Connection Size (In.) 1 MNPT, Min. Ambient Temp. -30 F, Max....More

Liquid Flow Switch, Rotor, SPDT, 35mA/95mA

GEMS SENSORS

Grainger Item # 1AMB2 | Mfr. Model # RFS 155425

Catalog Page # 3759 (PDF)

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, 0.5 GPM, NO

GEMS SENSORS

Grainger Item # 4JPH9 | Mfr. Model # FS-150 NO 0.5GPM

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 1/2 MNPT, Switch Enclosure...More

Flow Protector, Booster Pump, 230 V

DAYTON

Grainger Item # 1DGZ8 | Mfr. Model # 1DGZ8

Catalog Page # NA

Flow Protector, Max. HP 2, 1 Phase, 50/60 Hz, Min. Flow Rate 1 GPM, Connection Size (In.) 1 FNPT Slip PVC,...More

Liquid Flow Switch, Piston, SPST, 10VA

GEMS SENSORS

Grainger Item # 1ALV3 | Mfr. Model # FS-380P 197082

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Piston, Flow Rate 0.5 GPM, Connection Size (In.) 3/8 MNPT, Max. Ambient Temp. 212 F, Max....More

Switch, Liquid Flow

MCDONNELL & MILLER

Grainger Item # 4RC68 | Mfr. Model # FS6-1

Catalog Page # 3752 (PDF)

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

Grainger Item # 1ALA1 | Mfr. Model # FS-500 170232

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Shuttle, Flow Rate 0.5 GPM, Connection Size (In.) 3/4 FNPT, Max. Ambient Temp. 212 F,...More

Liquid Flow Switch, Piston, SPDT, 20VA

GEMS SENSORS

Grainger Item # 1ALD8 | Mfr. Model # FS-10798 25364

Catalog Page # 3760 (PDF)

Liquid Flow Switch, Piston, Flow Rate 0.5 to 20.0 GPM, Connection Size (In.) 1/2 FNPT, Min. Ambient Temp. -20...More

Liquid Flow Switch, 1.0 GPM, NO

GEMS SENSORS

Grainger Item # 4JPJ2 | Mfr. Model # FS-150 NO 1.0GPM

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Piston, Flow Rate 1.0 GPM, Connection Size (In.) 1/2 MNPT, Switch Enclosure...More

Liquid Flow Switch, Piston, SPST, 10VA

GEMS SENSORS

Grainger Item # 1ALV1 | Mfr. Model # FS-380P 209876

Catalog Page # 3759 (PDF)

Liquid Flow Switch, Piston, Flow Rate 0.15 GPM, Connection Size (In.) 3/8 MNPT, Max. Ambient Temp. 212 F,...More

Switch, Liquid Flow

MCDONNELL & MILLER

Grainger Item # 4RC72 | Mfr. Model # FS7-4W

Catalog Page # 3752 (PDF)

Industrial/Heavy-duty Switch, Min. Flow Rate 4.8 GPM, Max. Flow GPM 7.7, Connection Size (In.) 1 1/4 NPT,...More

Flow Switch, Max GPM 9

JOHNSON CONTROLS

Grainger Item # 40G310 | Mfr. Model # F61KD-4C

Catalog Page # 4243 (PDF)

Liquid Flow Switch, General Purpose Switch, Max. HP 1, 1 Phase, 60 Hz, Min. Flow Rate (GPM) 0.3, Max. Flow...More

Flow Protector, Booster Pump, 115 V

DAYTON

Grainger Item # 1DGZ7 | Mfr. Model # 1DGZ7

Catalog Page # NA

Flow Protector, Max. HP 3/4, 1 Phase, 50/60 Hz, Min. Flow Rate 1 GPM, Connection Size (In.) 1 FNPT Slip PVC,...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!

loader image