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  • Home
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  • Sight Flow Indicators
  • Products
    Calibration Services
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Pressure
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Air Quality
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Air Velocity
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Flow
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Level
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Temperature
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Test Equipment
    1. DEMO 1
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    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Valves
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    3. DEMO 3
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    Miscellaneous
    1. DEMO 1
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    5. DEMO 5
    Hazardous Rated
    1. DEMO 1
    2. DEMO 2
    3. DEMO 3
    4. DEMO 4
    5. DEMO 5
    Series SFI-100 & SFI-300
    Inexpensive Protection for Expensive Equipment and Systems MIDWEST Sight Flow Indicator are a dependable service at economical prices. All types feature a removable window for easy service.
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    Series 500
    Shows Level or Contents of Tanks, Pipelines; Tempered, Replaceable Glass Window Sight Window has a tough tempered glass window that resists chemical attacks and abrasions. Applications include pressure vessels, coolant tanks, and oil reservoirs.
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    Series 550
    Shows Level or Contents of Tanks, Pipelines; Fused Glass and Steel Construction Sight Window has fused glass style sight windows which feature glass to metal bond for reliability. Windows are clear and flush with front face.
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    Series SFI-300F
    Inexpensive Protection for Expensive Equipment and Systems MIDWEST Sight Flow Indicator has a double window with no moving indicator and the window is removable for easy service and replacement.
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    Series SFI-400
    Inexpensive Protection for Expensive Equipment and Systems MIDWEST Sight Flow Indicator has a glass tube construction offering easy flow viewing. These models are manufactured of quality materials and safety tested to assure long, dependable service at economical prices.
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    Series SFI-700
    Inexpensive Protection for Expensive Equipment and Systems MIDWEST Sight Flow Indicator offer threaded process connections. Maintenance is simple with internal wipers. Economical.
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    • Most Popular
    • Questions

    Most Popular

    Series SFI-100 & SFI-300
    Series 550
    Series SFI-700
    Series 500

    Questions

    Question
    If a customer complains the impeller in his sight flow indicator is not turning, what is most likely the problem?
    Answer
    Usually the impeller is fouled or the indicator is doing its job and actually indicating no flow.
    Related
    Series SFI-100 & SFI-300
    Series SFI-700
    Question
    If a customer claims the plastic impeller dissolved in plain water, what probably happened?
    Answer
    The customer exposed the sight flow indicator to fluid temperatures of 400-500 degrees Fahrenheit, considerably in excess of the published temperature specification.
    Related
    Series SFI-100 & SFI-300
    Series SFI-700
    Question
    I see that the SFI-300 MIDWEST Sight Flow Indicator has a flow direction shown as an arrow. What will happen if water flows in the opposite direction? Will the rotating impeller rotate in both directions? I want to use the indicator on a wakeboard boat to show water being pumped in both directions on a wake ballast system.
    Answer
    The inlets and outlets for SFI-300 are designed for flow to only be in one direction. You could physically push flow in the opposite direction, but you would risk damaging the impeller, and you would not get a true indication of flow.
    Related
    Series SFI-700
    Series SFI-100 & SFI-300
    Series SFI-400
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