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Thread: Most reliable Mechanical Flow switch

  1. #1
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    Most reliable Mechanical Flow switch

    I have been having a lot of failures with the Penn F261 flow switch recently. Can someone recommend a more reliable mechanical flow switch?

    Not looking for electronic flow switch.

  2. #2
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    Personally I've used United electric flow switch.
    UE
    From there you can select either differential or other switches

    Envoyé de mon moto g power en utilisant Tapatalk

  3. #3
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    For paddle there is mcdonnell flow switch.
    I do prefer differential pressure

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  4. #4
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    McDonnell is what I see around here for flow switches usually. Pretty reliable it seems.

    Sent from my SM-G965W using Tapatalk

  5. #5
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    Paddle style flow switches are old news!!

    I would be installing a differential pressure switch. Much easier to set, easier to replace and more accurate!!

  6. #6
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    Dp switches are fail unsafe.

    Paddle if installed correctly & calibrated are fail safe.

    Correctly selected and installed electronic are more reliable & fail safe.

  7. #7
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    McDonnell Miller FS8-W
    Its the only kind I can get from the most convenient place, so I don't have a lot of opinions on other options. But they seem to hold up a lot better than that kind you're talking about. Those Penn ones always seem to be full of water under the cover when I open it up.


  8. #8
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    IFM Efector u40100

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  10. #9
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    McDonnell Miller FS8-W listed as water tight, dust tight, nema 4x

    Penn F261 only listed as dust tight, nema 3r-4

  11. #10
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    Thread Starter
    Quote Originally Posted by CHAINIK View Post
    McDonnell Miller FS8-W
    Its the only kind I can get from the most convenient place, so I don't have a lot of opinions on other options. But they seem to hold up a lot better than that kind you're talking about. Those Penn ones always seem to be full of water under the cover when I open it up.

    I've had the seal leak on the Penn's, the glycol ended up in the control panel.

  12. #11
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    I suggest using the IFM

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  14. #12
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    Just install IFM

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  16. #13
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    Quote Originally Posted by HYP1278 View Post
    IFM Efector u40100
    I've installed probably 100 of these and have replaced maybe 4 for various failures. They are the most reliable solution out there for fluid flow proving. They are virtually maintenance free.
    The key to happiness is lower expectations.

    Don't pick the fly crap out of the pepper.

    A vote is like a rifle; it's usefulness depends on the character of the user.

  17. #14
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    Definitely agree with the others on here regarding the IFM Efector.


    Sent from my iPhone using Tapatalk

  18. #15
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    I've heard several different options here. I agree that the IFR would be the best. But, dollar for dollar the McDonald / Miller would be the best option. As far as condensation is concerned you can put oil in the body and use duct plug to fill the incoming electrical, never had an issue !
    Once in a while everything falls into place and I am able to move forward, most of the time it just falls all over the place and I can't go anywhere-GEO

  19. #16
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    If customer doesn’t want to spend the money a Harwill Q5 is an excellent flow switch, more durable than McDonnell Miller for large applications.

  20. #17
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    IFM
    no signature blast'em man blast'em
    !!!KILL THE TERRORIST!!!

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