Mcdonnell & Miller Flow Switches

The flow of liquids in pipelines plays an important role in industry and commerce. Under most circumstances it is essential to know whether or not there is a flow in a pipeline, and to act upon that knowledge. That is the reason for, and the function of, McDonnell & Miller Flow Switches. A complete line of Liquid Mcdonnell & Miller Flow Switches has been developed for a wide range of applications and literally hundreds of uses.

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  • FS1-J, High Sensitivity Flow Switch, 1/2" NPT (w/ BSPT Threads) View Specs

    $179.95 / each

    In Stock! (1 Available) Ships in 24-48 Hrs
  • FS1, 1/2" Flow Switch View Specs
    • SKU: 113200
    • Brand: Mcdonnell & Miller

    $171.95 / each

    $497.85 / box
    3 x $165.95

    In Stock! (18 Available) Ships in 24-48 Hrs
  • FS1-G, 1/2" Flow Switch w/ Gold Plated Contacts View Specs
    • SKU: 113250
    • Brand: Mcdonnell & Miller

    $175.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • FS1-W, 1/2" Flow Switch w/ NEMA 4X enclosure View Specs
    • SKU: 113601
    • Brand: Mcdonnell & Miller

    $189.95 / each

    In Stock! (3 Available) Ships in 24-48 Hrs
  • FS4-3D, 1" Flow Switch 4-3 W/2 SPDT Switches View Specs
    • SKU: 114550
    • Brand: Mcdonnell & Miller

    $168.95 / each

    In Stock! (8 Available) Ships in 24-48 Hrs
  • FS4-3S, 1" Flow Switch w/Stainless Steel Body, monel bellows View Specs
    • SKU: 114641
    • Brand: Mcdonnell & Miller

    $329.95 / each

    In Stock! (5 Available) Ships in 24-48 Hrs
  • FS4-3DS, 1" Flow Switch w/Stainless Steel Body and 2 SPDT switches View Specs

    $382.95 / each

    In Stock! (1 Available) Ships in 24-48 Hrs
  • FS4-3Z, 1" Flow Switch w/ ANSI terminal connections View Specs
    • SKU: 114410
    • Brand: Mcdonnell & Miller

    $105.55 / each

    $305.55 / box
    3 x $101.85

    In Stock! (3 Available) Ships in 24-48 Hrs
  • FS4-3T1-3/4, 3/4" Flow Switch w/NPT body (High Flow Rate) View Specs
    • SKU: 114800
    • Brand: Mcdonnell & Miller

    $161.75 / each

    In Stock! (6 Available) Ships in 24-48 Hrs
  • FS4-3T2-3/4, 3/4" Flow Switch w/ NPT body (Medium Flow Rate) View Specs
    • SKU: 114900
    • Brand: Mcdonnell & Miller

    $161.75 / each

    In Stock! (7 Available) Ships in 24-48 Hrs
  • FS4-3T3-3/4, 3/4" Flow Switch w/NPT body (Low Flow Rate) View Specs
    • SKU: 115000
    • Brand: Mcdonnell & Miller

    $161.75 / each

    In Stock! (8 Available) Ships in 24-48 Hrs
  • FS4-3T1-1, 1" Flow Switch w/ NPT body (High Flow Rate) View Specs
    • SKU: 115100
    • Brand: Mcdonnell & Miller

    $161.75 / each

    In Stock! (4 Available) Ships in 24-48 Hrs
  • FS4-3T2-1, 1" Flow Switch w/ NPT body (Medium Flow Rate) View Specs
    • SKU: 115200
    • Brand: Mcdonnell & Miller

    $161.75 / each

    In Stock! (3 Available) Ships in 24-48 Hrs
  • FS4-3T3-1, 1" Flow Switch w/ NPT body (Low Flow Rate) View Specs
    • SKU: 115300
    • Brand: Mcdonnell & Miller

    $161.75 / each

    $467.85 / box
    3 x $155.95

    In Stock! (15 Available) Ships in 24-48 Hrs
  • FS5-3/4, 3/4" Flow Switch View Specs
    • SKU: 114760
    • Brand: Mcdonnell & Miller

    $175.95 / each

    $509.25 / box
    3 x $169.75

    In Stock! (31 Available) Ships in 24-48 Hrs
  • FS4-3, 1" General Purpose Flow Switch - Paddle Style View Specs
    • SKU: 114400
    • Brand: Mcdonnell & Miller

    $91.95 / each

    $265.95 / box
    3 x $88.65

    In Stock! (153 Available) Ships in 24-48 Hrs
  • FS5-1, 1" Flow Switch View Specs
    • SKU: 114780
    • Brand: Mcdonnell & Miller

    $175.95 / each

    $509.25 / box
    3 x $169.75

    In Stock! (30 Available) Ships in 24-48 Hrs
  • FS5-D-1, 1" Flow Switch w/2 SPDT switches View Specs
    • SKU: 114783
    • Brand: Mcdonnell & Miller

    $231.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out
  • FS5-D-3/4, 3/4 Flow Switch w/2 SPDT switches View Specs
    • SKU: 114763
    • Brand: Mcdonnell & Miller

    $231.95 / each

    In Stock! (1 Available) Ships in 24-48 Hrs
  • FS5-DS-1, 1" Flow Switch w/Stainless Steel body, 2 SPDT switches View Specs

    $745.95 / each

    Non-Stock Item Allow 2-3 Weeks to Ship Out