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MCDONNELL & MILLER Flow Switches

14 results found that include 14 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

  • 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

  • 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 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

  • 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 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

  • 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 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 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 Heavy-duty, High Sensitivity Flow Switch,
    3/4 FNPT Heavy-duty, High Sensitivity Flow Switch,
    • MCDONNELL & MILLER
    • 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

  • 1 1/4 MNPT Industrial/Heavy-duty Flow Switch,
    1 1/4 MNPT Industrial/Heavy-duty Flow Switch,
    • MCDONNELL & MILLER
    • Item # 4RC71
    • Mfr. Model # FS7-4S
    • Industrial/Heavy-duty, Min. Flow Rate 4.8 GPM, Max. Flow GPM 7.7, Connection Size (In.) 1 1/4 NPT, Switch...More

  • 1 1/4 MNPT Industrial/Heavy-duty Flow Switch,
    1 1/4 MNPT Industrial/Heavy-duty Flow Switch,
    • MCDONNELL & MILLER
    • 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

  • 1 1/4 MNPT Industrial/Heavy-duty Flow Switch,
    1 1/4 MNPT Industrial/Heavy-duty Flow Switch,
    • MCDONNELL & MILLER
    • 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

  • 3/4 FNPT High Sensitivity Flow Switch,
    3/4 FNPT High Sensitivity Flow Switch,
    • MCDONNELL & MILLER
    • Item # 1RF65
    • Mfr. Model # FS6-W-3/4
    • High Sensitivity Switch, Min. Flow Rate 0.12 GPM, Max. Flow GPM 2.5, Connection Size (In.) 3/4 NPT, Switch...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